install asio headers separately to the root include

include/asio/CMakeLists.txt

@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.10.2)
+project(asio)
+
+# ascent library
+add_library(asio INTERFACE)
+target_compile_definitions(asio INTERFACE "-DASIO_STANDALONE")
+target_include_directories(asio INTERFACE
+	$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+	$<INSTALL_INTERFACE:include>)

include/asio/COPYING

@@ -0,0 +1,4 @@
+Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+
+Distributed under the Boost Software License, Version 1.0. (See accompanying
+file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

include/asio/INSTALL

@@ -0,0 +1,5 @@
+See doc/index.html for information on:
+  - External dependencies
+  - Using asio
+  - Supported platforms
+  - How to build the tests and examples

include/asio/LICENSE_1_0.txt

@@ -0,0 +1,23 @@
+Boost Software License - Version 1.0 - August 17th, 2003
+
+Permission is hereby granted, free of charge, to any person or organization
+obtaining a copy of the software and accompanying documentation covered by
+this license (the "Software") to use, reproduce, display, distribute,
+execute, and transmit the Software, and to prepare derivative works of the
+Software, and to permit third-parties to whom the Software is furnished to
+do so, all subject to the following:
+
+The copyright notices in the Software and this entire statement, including
+the above license grant, this restriction and the following disclaimer,
+must be included in all copies of the Software, in whole or in part, and
+all derivative works of the Software, unless such copies or derivative
+works are solely in the form of machine-executable object code generated by
+a source language processor.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

include/asio/Makefile.am

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include/asio/Makefile.in

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+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+	@list='$(DIST_SUBDIRS)'; for subdir in $$list; do \
+	  if test "$$subdir" = .; then :; else \
+	    $(am__make_dryrun) \
+	      || test -d "$(distdir)/$$subdir" \
+	      || $(MKDIR_P) "$(distdir)/$$subdir" \
+	      || exit 1; \
+	    dir1=$$subdir; dir2="$(distdir)/$$subdir"; \
+	    $(am__relativize); \
+	    new_distdir=$$reldir; \
+	    dir1=$$subdir; dir2="$(top_distdir)"; \
+	    $(am__relativize); \
+	    new_top_distdir=$$reldir; \
+	    echo " (cd $$subdir && $(MAKE) $(AM_MAKEFLAGS) top_distdir="$$new_top_distdir" distdir="$$new_distdir" \\"; \
+	    echo "     am__remove_distdir=: am__skip_length_check=: am__skip_mode_fix=: distdir)"; \
+	    ($(am__cd) $$subdir && \
+	      $(MAKE) $(AM_MAKEFLAGS) \
+	        top_distdir="$$new_top_distdir" \
+	        distdir="$$new_distdir" \
+		am__remove_distdir=: \
+		am__skip_length_check=: \
+		am__skip_mode_fix=: \
+	        distdir) \
+	      || exit 1; \
+	  fi; \
+	done
+	-test -n "$(am__skip_mode_fix)" \
+	|| find "$(distdir)" -type d ! -perm -755 \
+		-exec chmod u+rwx,go+rx {} \; -o \
+	  ! -type d ! -perm -444 -links 1 -exec chmod a+r {} \; -o \
+	  ! -type d ! -perm -400 -exec chmod a+r {} \; -o \
+	  ! -type d ! -perm -444 -exec $(install_sh) -c -m a+r {} {} \; \
+	|| chmod -R a+r "$(distdir)"
+dist-gzip: distdir
+	tardir=$(distdir) && $(am__tar) | eval GZIP= gzip $(GZIP_ENV) -c >$(distdir).tar.gz
+	$(am__post_remove_distdir)
+dist-bzip2: distdir
+	tardir=$(distdir) && $(am__tar) | BZIP2=$${BZIP2--9} bzip2 -c >$(distdir).tar.bz2
+	$(am__post_remove_distdir)
+
+dist-lzip: distdir
+	tardir=$(distdir) && $(am__tar) | lzip -c $${LZIP_OPT--9} >$(distdir).tar.lz
+	$(am__post_remove_distdir)
+
+dist-xz: distdir
+	tardir=$(distdir) && $(am__tar) | XZ_OPT=$${XZ_OPT--e} xz -c >$(distdir).tar.xz
+	$(am__post_remove_distdir)
+
+dist-tarZ: distdir
+	@echo WARNING: "Support for distribution archives compressed with" \
+		       "legacy program 'compress' is deprecated." >&2
+	@echo WARNING: "It will be removed altogether in Automake 2.0" >&2
+	tardir=$(distdir) && $(am__tar) | compress -c >$(distdir).tar.Z
+	$(am__post_remove_distdir)
+
+dist-shar: distdir
+	@echo WARNING: "Support for shar distribution archives is" \
+	               "deprecated." >&2
+	@echo WARNING: "It will be removed altogether in Automake 2.0" >&2
+	shar $(distdir) | eval GZIP= gzip $(GZIP_ENV) -c >$(distdir).shar.gz
+	$(am__post_remove_distdir)
+dist-zip: distdir
+	-rm -f $(distdir).zip
+	zip -rq $(distdir).zip $(distdir)
+	$(am__post_remove_distdir)
+
+dist dist-all:
+	$(MAKE) $(AM_MAKEFLAGS) $(DIST_TARGETS) am__post_remove_distdir='@:'
+	$(am__post_remove_distdir)
+
+# This target untars the dist file and tries a VPATH configuration.  Then
+# it guarantees that the distribution is self-contained by making another
+# tarfile.
+distcheck: dist
+	case '$(DIST_ARCHIVES)' in \
+	*.tar.gz*) \
+	  eval GZIP= gzip $(GZIP_ENV) -dc $(distdir).tar.gz | $(am__untar) ;;\
+	*.tar.bz2*) \
+	  bzip2 -dc $(distdir).tar.bz2 | $(am__untar) ;;\
+	*.tar.lz*) \
+	  lzip -dc $(distdir).tar.lz | $(am__untar) ;;\
+	*.tar.xz*) \
+	  xz -dc $(distdir).tar.xz | $(am__untar) ;;\
+	*.tar.Z*) \
+	  uncompress -c $(distdir).tar.Z | $(am__untar) ;;\
+	*.shar.gz*) \
+	  eval GZIP= gzip $(GZIP_ENV) -dc $(distdir).shar.gz | unshar ;;\
+	*.zip*) \
+	  unzip $(distdir).zip ;;\
+	esac
+	chmod -R a-w $(distdir)
+	chmod u+w $(distdir)
+	mkdir $(distdir)/_build $(distdir)/_build/sub $(distdir)/_inst
+	chmod a-w $(distdir)
+	test -d $(distdir)/_build || exit 0; \
+	dc_install_base=`$(am__cd) $(distdir)/_inst && pwd | sed -e 's,^[^:\\/]:[\\/],/,'` \
+	  && dc_destdir="$${TMPDIR-/tmp}/am-dc-$$$$/" \
+	  && am__cwd=`pwd` \
+	  && $(am__cd) $(distdir)/_build/sub \
+	  && ../../configure \
+	    $(AM_DISTCHECK_CONFIGURE_FLAGS) \
+	    $(DISTCHECK_CONFIGURE_FLAGS) \
+	    --srcdir=../.. --prefix="$$dc_install_base" \
+	  && $(MAKE) $(AM_MAKEFLAGS) \
+	  && $(MAKE) $(AM_MAKEFLAGS) dvi \
+	  && $(MAKE) $(AM_MAKEFLAGS) check \
+	  && $(MAKE) $(AM_MAKEFLAGS) install \
+	  && $(MAKE) $(AM_MAKEFLAGS) installcheck \
+	  && $(MAKE) $(AM_MAKEFLAGS) uninstall \
+	  && $(MAKE) $(AM_MAKEFLAGS) distuninstallcheck_dir="$$dc_install_base" \
+	        distuninstallcheck \
+	  && chmod -R a-w "$$dc_install_base" \
+	  && ({ \
+	       (cd ../.. && umask 077 && mkdir "$$dc_destdir") \
+	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" install \
+	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" uninstall \
+	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" \
+	            distuninstallcheck_dir="$$dc_destdir" distuninstallcheck; \
+	      } || { rm -rf "$$dc_destdir"; exit 1; }) \
+	  && rm -rf "$$dc_destdir" \
+	  && $(MAKE) $(AM_MAKEFLAGS) dist \
+	  && rm -rf $(DIST_ARCHIVES) \
+	  && $(MAKE) $(AM_MAKEFLAGS) distcleancheck \
+	  && cd "$$am__cwd" \
+	  || exit 1
+	$(am__post_remove_distdir)
+	@(echo "$(distdir) archives ready for distribution: "; \
+	  list='$(DIST_ARCHIVES)'; for i in $$list; do echo $$i; done) | \
+	  sed -e 1h -e 1s/./=/g -e 1p -e 1x -e '$$p' -e '$$x'
+distuninstallcheck:
+	@test -n '$(distuninstallcheck_dir)' || { \
+	  echo 'ERROR: trying to run $@ with an empty' \
+	       '$$(distuninstallcheck_dir)' >&2; \
+	  exit 1; \
+	}; \
+	$(am__cd) '$(distuninstallcheck_dir)' || { \
+	  echo 'ERROR: cannot chdir into $(distuninstallcheck_dir)' >&2; \
+	  exit 1; \
+	}; \
+	test `$(am__distuninstallcheck_listfiles) | wc -l` -eq 0 \
+	   || { echo "ERROR: files left after uninstall:" ; \
+	        if test -n "$(DESTDIR)"; then \
+	          echo "  (check DESTDIR support)"; \
+	        fi ; \
+	        $(distuninstallcheck_listfiles) ; \
+	        exit 1; } >&2
+distcleancheck: distclean
+	@if test '$(srcdir)' = . ; then \
+	  echo "ERROR: distcleancheck can only run from a VPATH build" ; \
+	  exit 1 ; \
+	fi
+	@test `$(distcleancheck_listfiles) | wc -l` -eq 0 \
+	  || { echo "ERROR: files left in build directory after distclean:" ; \
+	       $(distcleancheck_listfiles) ; \
+	       exit 1; } >&2
+check-am: all-am
+check: check-recursive
+all-am: Makefile
+installdirs: installdirs-recursive
+installdirs-am:
+install: install-recursive
+install-exec: install-exec-recursive
+install-data: install-data-recursive
+uninstall: uninstall-recursive
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-recursive
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+	-test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES)
+clean: clean-recursive
+
+clean-am: clean-generic mostlyclean-am
+
+distclean: distclean-recursive
+	-rm -f $(am__CONFIG_DISTCLEAN_FILES)
+	-rm -f Makefile
+distclean-am: clean-am distclean-generic distclean-tags
+
+dvi: dvi-recursive
+
+dvi-am:
+
+html: html-recursive
+
+html-am:
+
+info: info-recursive
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-recursive
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-recursive
+
+install-html-am:
+
+install-info: install-info-recursive
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-recursive
+
+install-pdf-am:
+
+install-ps: install-ps-recursive
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-recursive
+	-rm -f $(am__CONFIG_DISTCLEAN_FILES)
+	-rm -rf $(top_srcdir)/autom4te.cache
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-recursive
+
+mostlyclean-am: mostlyclean-generic
+
+pdf: pdf-recursive
+
+pdf-am:
+
+ps: ps-recursive
+
+ps-am:
+
+uninstall-am:
+
+.MAKE: $(am__recursive_targets) install-am install-strip
+
+.PHONY: $(am__recursive_targets) CTAGS GTAGS TAGS all all-am \
+	am--refresh check check-am clean clean-cscope clean-generic \
+	cscope cscopelist-am ctags ctags-am dist dist-all dist-bzip2 \
+	dist-gzip dist-lzip dist-shar dist-tarZ dist-xz dist-zip \
+	distcheck distclean distclean-generic distclean-tags \
+	distcleancheck distdir distuninstallcheck dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs installdirs-am maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-generic pdf \
+	pdf-am ps ps-am tags tags-am uninstall uninstall-am
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:

include/asio/compile

@@ -0,0 +1,347 @@
+#! /bin/sh
+# Wrapper for compilers which do not understand '-c -o'.
+
+scriptversion=2012-10-14.11; # UTC
+
+# Copyright (C) 1999-2013 Free Software Foundation, Inc.
+# Written by Tom Tromey <tromey@cygnus.com>.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+nl='
+'
+
+# We need space, tab and new line, in precisely that order.  Quoting is
+# there to prevent tools from complaining about whitespace usage.
+IFS=" ""	$nl"
+
+file_conv=
+
+# func_file_conv build_file lazy
+# Convert a $build file to $host form and store it in $file
+# Currently only supports Windows hosts. If the determined conversion
+# type is listed in (the comma separated) LAZY, no conversion will
+# take place.
+func_file_conv ()
+{
+  file=$1
+  case $file in
+    / | /[!/]*) # absolute file, and not a UNC file
+      if test -z "$file_conv"; then
+	# lazily determine how to convert abs files
+	case `uname -s` in
+	  MINGW*)
+	    file_conv=mingw
+	    ;;
+	  CYGWIN*)
+	    file_conv=cygwin
+	    ;;
+	  *)
+	    file_conv=wine
+	    ;;
+	esac
+      fi
+      case $file_conv/,$2, in
+	*,$file_conv,*)
+	  ;;
+	mingw/*)
+	  file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'`
+	  ;;
+	cygwin/*)
+	  file=`cygpath -m "$file" || echo "$file"`
+	  ;;
+	wine/*)
+	  file=`winepath -w "$file" || echo "$file"`
+	  ;;
+      esac
+      ;;
+  esac
+}
+
+# func_cl_dashL linkdir
+# Make cl look for libraries in LINKDIR
+func_cl_dashL ()
+{
+  func_file_conv "$1"
+  if test -z "$lib_path"; then
+    lib_path=$file
+  else
+    lib_path="$lib_path;$file"
+  fi
+  linker_opts="$linker_opts -LIBPATH:$file"
+}
+
+# func_cl_dashl library
+# Do a library search-path lookup for cl
+func_cl_dashl ()
+{
+  lib=$1
+  found=no
+  save_IFS=$IFS
+  IFS=';'
+  for dir in $lib_path $LIB
+  do
+    IFS=$save_IFS
+    if $shared && test -f "$dir/$lib.dll.lib"; then
+      found=yes
+      lib=$dir/$lib.dll.lib
+      break
+    fi
+    if test -f "$dir/$lib.lib"; then
+      found=yes
+      lib=$dir/$lib.lib
+      break
+    fi
+    if test -f "$dir/lib$lib.a"; then
+      found=yes
+      lib=$dir/lib$lib.a
+      break
+    fi
+  done
+  IFS=$save_IFS
+
+  if test "$found" != yes; then
+    lib=$lib.lib
+  fi
+}
+
+# func_cl_wrapper cl arg...
+# Adjust compile command to suit cl
+func_cl_wrapper ()
+{
+  # Assume a capable shell
+  lib_path=
+  shared=:
+  linker_opts=
+  for arg
+  do
+    if test -n "$eat"; then
+      eat=
+    else
+      case $1 in
+	-o)
+	  # configure might choose to run compile as 'compile cc -o foo foo.c'.
+	  eat=1
+	  case $2 in
+	    *.o | *.[oO][bB][jJ])
+	      func_file_conv "$2"
+	      set x "$@" -Fo"$file"
+	      shift
+	      ;;
+	    *)
+	      func_file_conv "$2"
+	      set x "$@" -Fe"$file"
+	      shift
+	      ;;
+	  esac
+	  ;;
+	-I)
+	  eat=1
+	  func_file_conv "$2" mingw
+	  set x "$@" -I"$file"
+	  shift
+	  ;;
+	-I*)
+	  func_file_conv "${1#-I}" mingw
+	  set x "$@" -I"$file"
+	  shift
+	  ;;
+	-l)
+	  eat=1
+	  func_cl_dashl "$2"
+	  set x "$@" "$lib"
+	  shift
+	  ;;
+	-l*)
+	  func_cl_dashl "${1#-l}"
+	  set x "$@" "$lib"
+	  shift
+	  ;;
+	-L)
+	  eat=1
+	  func_cl_dashL "$2"
+	  ;;
+	-L*)
+	  func_cl_dashL "${1#-L}"
+	  ;;
+	-static)
+	  shared=false
+	  ;;
+	-Wl,*)
+	  arg=${1#-Wl,}
+	  save_ifs="$IFS"; IFS=','
+	  for flag in $arg; do
+	    IFS="$save_ifs"
+	    linker_opts="$linker_opts $flag"
+	  done
+	  IFS="$save_ifs"
+	  ;;
+	-Xlinker)
+	  eat=1
+	  linker_opts="$linker_opts $2"
+	  ;;
+	-*)
+	  set x "$@" "$1"
+	  shift
+	  ;;
+	*.cc | *.CC | *.cxx | *.CXX | *.[cC]++)
+	  func_file_conv "$1"
+	  set x "$@" -Tp"$file"
+	  shift
+	  ;;
+	*.c | *.cpp | *.CPP | *.lib | *.LIB | *.Lib | *.OBJ | *.obj | *.[oO])
+	  func_file_conv "$1" mingw
+	  set x "$@" "$file"
+	  shift
+	  ;;
+	*)
+	  set x "$@" "$1"
+	  shift
+	  ;;
+      esac
+    fi
+    shift
+  done
+  if test -n "$linker_opts"; then
+    linker_opts="-link$linker_opts"
+  fi
+  exec "$@" $linker_opts
+  exit 1
+}
+
+eat=
+
+case $1 in
+  '')
+     echo "$0: No command.  Try '$0 --help' for more information." 1>&2
+     exit 1;
+     ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: compile [--help] [--version] PROGRAM [ARGS]
+
+Wrapper for compilers which do not understand '-c -o'.
+Remove '-o dest.o' from ARGS, run PROGRAM with the remaining
+arguments, and rename the output as expected.
+
+If you are trying to build a whole package this is not the
+right script to run: please start by reading the file 'INSTALL'.
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "compile $scriptversion"
+    exit $?
+    ;;
+  cl | *[/\\]cl | cl.exe | *[/\\]cl.exe )
+    func_cl_wrapper "$@"      # Doesn't return...
+    ;;
+esac
+
+ofile=
+cfile=
+
+for arg
+do
+  if test -n "$eat"; then
+    eat=
+  else
+    case $1 in
+      -o)
+	# configure might choose to run compile as 'compile cc -o foo foo.c'.
+	# So we strip '-o arg' only if arg is an object.
+	eat=1
+	case $2 in
+	  *.o | *.obj)
+	    ofile=$2
+	    ;;
+	  *)
+	    set x "$@" -o "$2"
+	    shift
+	    ;;
+	esac
+	;;
+      *.c)
+	cfile=$1
+	set x "$@" "$1"
+	shift
+	;;
+      *)
+	set x "$@" "$1"
+	shift
+	;;
+    esac
+  fi
+  shift
+done
+
+if test -z "$ofile" || test -z "$cfile"; then
+  # If no '-o' option was seen then we might have been invoked from a
+  # pattern rule where we don't need one.  That is ok -- this is a
+  # normal compilation that the losing compiler can handle.  If no
+  # '.c' file was seen then we are probably linking.  That is also
+  # ok.
+  exec "$@"
+fi
+
+# Name of file we expect compiler to create.
+cofile=`echo "$cfile" | sed 's|^.*[\\/]||; s|^[a-zA-Z]:||; s/\.c$/.o/'`
+
+# Create the lock directory.
+# Note: use '[/\\:.-]' here to ensure that we don't use the same name
+# that we are using for the .o file.  Also, base the name on the expected
+# object file name, since that is what matters with a parallel build.
+lockdir=`echo "$cofile" | sed -e 's|[/\\:.-]|_|g'`.d
+while true; do
+  if mkdir "$lockdir" >/dev/null 2>&1; then
+    break
+  fi
+  sleep 1
+done
+# FIXME: race condition here if user kills between mkdir and trap.
+trap "rmdir '$lockdir'; exit 1" 1 2 15
+
+# Run the compile.
+"$@"
+ret=$?
+
+if test -f "$cofile"; then
+  test "$cofile" = "$ofile" || mv "$cofile" "$ofile"
+elif test -f "${cofile}bj"; then
+  test "${cofile}bj" = "$ofile" || mv "${cofile}bj" "$ofile"
+fi
+
+rmdir "$lockdir"
+exit $ret
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:

include/asio/configure.ac

@@ -0,0 +1,230 @@
+AC_INIT(asio, [1.18.0])
+AC_CONFIG_SRCDIR(include/asio.hpp)
+AM_MAINTAINER_MODE
+AM_INIT_AUTOMAKE([tar-ustar])
+
+AC_CANONICAL_HOST
+AM_PROG_CC_C_O
+AC_PROG_CXX
+AC_LANG(C++)
+AC_PROG_RANLIB
+
+AC_DEFINE(_REENTRANT, [1], [Define this])
+
+AC_ARG_WITH(boost,
+  AC_HELP_STRING([--with-boost=DIR],[location of boost distribution]),
+[
+  if test "${withval}" = no; then
+    STANDALONE="yes"
+  else
+    if test "${withval}" != system; then
+      CPPFLAGS="$CPPFLAGS -I${withval}"
+      LIBS="$LIBS -L${withval}/stage/lib"
+    fi
+    CPPFLAGS="$CPPFLAGS -DASIO_ENABLE_BOOST -DBOOST_CHRONO_HEADER_ONLY -DBOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING"
+  fi
+],
+[
+  STANDALONE="yes"
+])
+
+AC_ARG_ENABLE(separate-compilation,
+[  --enable-separate-compilation  separate compilation of asio source],
+[
+  SEPARATE_COMPILATION=yes
+])
+
+AC_ARG_ENABLE(boost-coroutine,
+[  --enable-boost-coroutine  use Boost.Coroutine to implement stackful coroutines],
+[
+  HAVE_BOOST_COROUTINE=yes
+])
+
+if test "$STANDALONE" != yes; then
+  AC_CHECK_HEADER([boost/noncopyable.hpp],,
+  [
+    echo "Can't find boost headers. Please check the location of the boost"
+    echo "distribution and rerun configure using the --with-boost=DIR option."
+    echo "Alternatively, run with --without-boost to enable standalone build."
+    exit 1
+  ],[])
+fi
+
+AC_ARG_WITH(openssl,
+  AC_HELP_STRING([--with-openssl=DIR],[location of openssl]),
+[
+  CPPFLAGS="$CPPFLAGS -I${withval}/include"
+  LIBS="$LIBS -L${withval}/lib"
+],[])
+
+AC_CHECK_HEADER([openssl/ssl.h],,
+[
+  OPENSSL_FOUND=no
+],[])
+
+if test x$OPENSSL_FOUND != xno; then
+  LIBS="$LIBS -lssl -lcrypto"
+fi
+
+AM_CONDITIONAL(HAVE_OPENSSL,test x$OPENSSL_FOUND != xno)
+
+WINDOWS=no
+case $host in
+  *-*-linux*)
+    CXXFLAGS="$CXXFLAGS -pthread"
+    LDFLAGS="$LDFLAGS -pthread"
+    LIBS="$LIBS -lrt"
+    ;;
+  *-*-solaris*)
+    if test "$GXX" = yes; then
+      CXXFLAGS="$CXXFLAGS -D_PTHREADS"
+    else
+      # We'll assume Sun's CC.
+      CXXFLAGS="$CXXFLAGS -mt"
+    fi
+    LIBS="$LIBS -lsocket -lnsl -lpthread"
+    ;;
+  *-*-mingw32*)
+    CXXFLAGS="$CXXFLAGS -mthreads"
+    LDFLAGS="$LDFLAGS -mthreads"
+    LIBS="$LIBS -lws2_32 -lmswsock"
+    WINDOWS=yes
+    ;;
+  *-*-mingw64*)
+    CXXFLAGS="$CXXFLAGS -mthreads"
+    LDFLAGS="$LDFLAGS -mthreads"
+    LIBS="$LIBS -lws2_32 -lmswsock"
+    WINDOWS=yes
+    ;;
+  *-pc-cygwin*)
+    CXXFLAGS="$CXXFLAGS -D__USE_W32_SOCKETS -D_WIN32_WINNT=0x0601"
+    LIBS="$LIBS -lws2_32 -lmswsock"
+    WINDOWS=yes
+    ;;
+  *-apple-darwin*)
+    CXXFLAGS="$CXXFLAGS"
+    LDFLAGS="$LDFLAGS"
+    ;;
+  *-*-freebsd*)
+    CXXFLAGS="$CXXFLAGS -pthread"
+    LDFLAGS="$LDFLAGS -pthread"
+    ;;
+  *-*-netbsd*)
+    CXXFLAGS="$CXXFLAGS -pthread"
+    LDFLAGS="$LDFLAGS -pthread"
+    ;;
+  *-*-haiku*)
+    CXXFLAGS="$CXXFLAGS -lnetwork"
+    LDFLAGS="$LDFLAGS -lnetwork"
+
+esac
+
+if test "$GXX" = yes; then
+  CXXFLAGS="$CXXFLAGS -ftemplate-depth-256"
+fi
+
+if test "$STANDALONE" = yes; then
+  CPPFLAGS="$CPPFLAGS -DASIO_STANDALONE"
+fi
+
+if test "$SEPARATE_COMPILATION" = yes; then
+  CPPFLAGS="$CPPFLAGS -DASIO_SEPARATE_COMPILATION"
+fi
+
+AC_MSG_CHECKING([whether C++11 is enabled])
+AC_COMPILE_IFELSE(
+  [AC_LANG_PROGRAM(
+    [[#if __cplusplus < 201103L]]
+    [[#error C++11 not available]]
+    [[#endif]])],
+  [AC_MSG_RESULT([yes])
+    HAVE_CXX11=yes;],
+  [AC_MSG_RESULT([no])
+    HAVE_CXX11=no;])
+
+AC_MSG_CHECKING([whether C++14 is enabled])
+AC_COMPILE_IFELSE(
+  [AC_LANG_PROGRAM(
+    [[#if defined(__GNUC__) && !defined(__clang__)]]
+    [[# if (__GNUC__ <= 6)]]
+    [[#  error C++14 support on this compiler not sufficiently compliant]]
+    [[# endif]]
+    [[#endif]]
+    [[#if __cplusplus < 201402L]]
+    [[#error C++14 not available]]
+    [[#endif]])],
+  [AC_MSG_RESULT([yes])
+    HAVE_CXX14=yes;],
+  [AC_MSG_RESULT([no])
+    HAVE_CXX14=no;])
+
+AC_MSG_CHECKING([whether C++17 is enabled])
+AC_COMPILE_IFELSE(
+  [AC_LANG_PROGRAM(
+    [[#if __cplusplus < 201703L]]
+    [[#error C++17 not available]]
+    [[#endif]])],
+  [AC_MSG_RESULT([yes])
+    HAVE_CXX17=yes;],
+  [AC_MSG_RESULT([no])
+    HAVE_CXX17=no;])
+
+AC_MSG_CHECKING([whether coroutines are enabled])
+AC_COMPILE_IFELSE(
+  [AC_LANG_PROGRAM(
+    [[#if defined(__clang__)]]
+    [[# if (__cplusplus >= 201703) && (__cpp_coroutines >= 201703)]]
+    [[#  if __has_include(<experimental/coroutine>)]]
+    [[#   define ASIO_HAS_CO_AWAIT 1]]
+    [[#  endif]]
+    [[# endif]]
+    [[#elif defined(__GNUC__)]]
+    [[# if (__cplusplus >= 201709) && (__cpp_impl_coroutine >= 201902)]]
+    [[#  if __has_include(<coroutine>)]]
+    [[#   define ASIO_HAS_CO_AWAIT 1]]
+    [[#  endif]]
+    [[# endif]]
+    [[#endif]]
+    [[#ifndef ASIO_HAS_CO_AWAIT]]
+    [[# error coroutines not available]]
+    [[#endif]])],
+  [AC_MSG_RESULT([yes])
+    HAVE_COROUTINES=yes;],
+  [AC_MSG_RESULT([no])
+    HAVE_COROUTINES=no;])
+
+if test "$GXX" = yes; then
+  if test "$STANDALONE" = yes; then
+    if test "$HAVE_CXX11" = no; then
+      HAVE_CXX11=yes
+      CPPFLAGS="-std=c++0x $CPPFLAGS"
+    fi
+  fi
+fi
+
+AM_CONDITIONAL(STANDALONE,test x$STANDALONE = xyes)
+
+AM_CONDITIONAL(SEPARATE_COMPILATION,test x$SEPARATE_COMPILATION = xyes)
+
+AM_CONDITIONAL(HAVE_BOOST_COROUTINE,test x$HAVE_BOOST_COROUTINE = xyes)
+
+AM_CONDITIONAL(WINDOWS_TARGET,test x$WINDOWS != xno)
+
+AM_CONDITIONAL(HAVE_CXX11,test x$HAVE_CXX11 = xyes)
+
+AM_CONDITIONAL(HAVE_CXX14,test x$HAVE_CXX14 = xyes)
+
+AM_CONDITIONAL(HAVE_CXX17,test x$HAVE_CXX17 = xyes)
+
+AM_CONDITIONAL(HAVE_COROUTINES,test x$HAVE_COROUTINES = xyes)
+
+AC_OUTPUT([
+  Makefile
+  include/Makefile
+  src/Makefile
+  src/tests/Makefile
+  src/tests/properties/Makefile
+  src/examples/cpp03/Makefile
+  src/examples/cpp11/Makefile
+  src/examples/cpp14/Makefile
+  src/examples/cpp17/Makefile])

include/asio/depcomp

@@ -0,0 +1,791 @@
+#! /bin/sh
+# depcomp - compile a program generating dependencies as side-effects
+
+scriptversion=2013-05-30.07; # UTC
+
+# Copyright (C) 1999-2013 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
+
+case $1 in
+  '')
+    echo "$0: No command.  Try '$0 --help' for more information." 1>&2
+    exit 1;
+    ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: depcomp [--help] [--version] PROGRAM [ARGS]
+
+Run PROGRAMS ARGS to compile a file, generating dependencies
+as side-effects.
+
+Environment variables:
+  depmode     Dependency tracking mode.
+  source      Source file read by 'PROGRAMS ARGS'.
+  object      Object file output by 'PROGRAMS ARGS'.
+  DEPDIR      directory where to store dependencies.
+  depfile     Dependency file to output.
+  tmpdepfile  Temporary file to use when outputting dependencies.
+  libtool     Whether libtool is used (yes/no).
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "depcomp $scriptversion"
+    exit $?
+    ;;
+esac
+
+# Get the directory component of the given path, and save it in the
+# global variables '$dir'.  Note that this directory component will
+# be either empty or ending with a '/' character.  This is deliberate.
+set_dir_from ()
+{
+  case $1 in
+    */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
+      *) dir=;;
+  esac
+}
+
+# Get the suffix-stripped basename of the given path, and save it the
+# global variable '$base'.
+set_base_from ()
+{
+  base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
+}
+
+# If no dependency file was actually created by the compiler invocation,
+# we still have to create a dummy depfile, to avoid errors with the
+# Makefile "include basename.Plo" scheme.
+make_dummy_depfile ()
+{
+  echo "#dummy" > "$depfile"
+}
+
+# Factor out some common post-processing of the generated depfile.
+# Requires the auxiliary global variable '$tmpdepfile' to be set.
+aix_post_process_depfile ()
+{
+  # If the compiler actually managed to produce a dependency file,
+  # post-process it.
+  if test -f "$tmpdepfile"; then
+    # Each line is of the form 'foo.o: dependency.h'.
+    # Do two passes, one to just change these to
+    #   $object: dependency.h
+    # and one to simply output
+    #   dependency.h:
+    # which is needed to avoid the deleted-header problem.
+    { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
+      sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
+    } > "$depfile"
+    rm -f "$tmpdepfile"
+  else
+    make_dummy_depfile
+  fi
+}
+
+# A tabulation character.
+tab='	'
+# A newline character.
+nl='
+'
+# Character ranges might be problematic outside the C locale.
+# These definitions help.
+upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
+lower=abcdefghijklmnopqrstuvwxyz
+digits=0123456789
+alpha=${upper}${lower}
+
+if test -z "$depmode" || test -z "$source" || test -z "$object"; then
+  echo "depcomp: Variables source, object and depmode must be set" 1>&2
+  exit 1
+fi
+
+# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
+depfile=${depfile-`echo "$object" |
+  sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
+tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
+
+rm -f "$tmpdepfile"
+
+# Avoid interferences from the environment.
+gccflag= dashmflag=
+
+# Some modes work just like other modes, but use different flags.  We
+# parameterize here, but still list the modes in the big case below,
+# to make depend.m4 easier to write.  Note that we *cannot* use a case
+# here, because this file can only contain one case statement.
+if test "$depmode" = hp; then
+  # HP compiler uses -M and no extra arg.
+  gccflag=-M
+  depmode=gcc
+fi
+
+if test "$depmode" = dashXmstdout; then
+  # This is just like dashmstdout with a different argument.
+  dashmflag=-xM
+  depmode=dashmstdout
+fi
+
+cygpath_u="cygpath -u -f -"
+if test "$depmode" = msvcmsys; then
+  # This is just like msvisualcpp but w/o cygpath translation.
+  # Just convert the backslash-escaped backslashes to single forward
+  # slashes to satisfy depend.m4
+  cygpath_u='sed s,\\\\,/,g'
+  depmode=msvisualcpp
+fi
+
+if test "$depmode" = msvc7msys; then
+  # This is just like msvc7 but w/o cygpath translation.
+  # Just convert the backslash-escaped backslashes to single forward
+  # slashes to satisfy depend.m4
+  cygpath_u='sed s,\\\\,/,g'
+  depmode=msvc7
+fi
+
+if test "$depmode" = xlc; then
+  # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
+  gccflag=-qmakedep=gcc,-MF
+  depmode=gcc
+fi
+
+case "$depmode" in
+gcc3)
+## gcc 3 implements dependency tracking that does exactly what
+## we want.  Yay!  Note: for some reason libtool 1.4 doesn't like
+## it if -MD -MP comes after the -MF stuff.  Hmm.
+## Unfortunately, FreeBSD c89 acceptance of flags depends upon
+## the command line argument order; so add the flags where they
+## appear in depend2.am.  Note that the slowdown incurred here
+## affects only configure: in makefiles, %FASTDEP% shortcuts this.
+  for arg
+  do
+    case $arg in
+    -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
+    *)  set fnord "$@" "$arg" ;;
+    esac
+    shift # fnord
+    shift # $arg
+  done
+  "$@"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  mv "$tmpdepfile" "$depfile"
+  ;;
+
+gcc)
+## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
+## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
+## (see the conditional assignment to $gccflag above).
+## There are various ways to get dependency output from gcc.  Here's
+## why we pick this rather obscure method:
+## - Don't want to use -MD because we'd like the dependencies to end
+##   up in a subdir.  Having to rename by hand is ugly.
+##   (We might end up doing this anyway to support other compilers.)
+## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
+##   -MM, not -M (despite what the docs say).  Also, it might not be
+##   supported by the other compilers which use the 'gcc' depmode.
+## - Using -M directly means running the compiler twice (even worse
+##   than renaming).
+  if test -z "$gccflag"; then
+    gccflag=-MD,
+  fi
+  "$@" -Wp,"$gccflag$tmpdepfile"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  # The second -e expression handles DOS-style file names with drive
+  # letters.
+  sed -e 's/^[^:]*: / /' \
+      -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
+## This next piece of magic avoids the "deleted header file" problem.
+## The problem is that when a header file which appears in a .P file
+## is deleted, the dependency causes make to die (because there is
+## typically no way to rebuild the header).  We avoid this by adding
+## dummy dependencies for each header file.  Too bad gcc doesn't do
+## this for us directly.
+## Some versions of gcc put a space before the ':'.  On the theory
+## that the space means something, we add a space to the output as
+## well.  hp depmode also adds that space, but also prefixes the VPATH
+## to the object.  Take care to not repeat it in the output.
+## Some versions of the HPUX 10.20 sed can't process this invocation
+## correctly.  Breaking it into two sed invocations is a workaround.
+  tr ' ' "$nl" < "$tmpdepfile" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+sgi)
+  if test "$libtool" = yes; then
+    "$@" "-Wp,-MDupdate,$tmpdepfile"
+  else
+    "$@" -MDupdate "$tmpdepfile"
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+
+  if test -f "$tmpdepfile"; then  # yes, the sourcefile depend on other files
+    echo "$object : \\" > "$depfile"
+    # Clip off the initial element (the dependent).  Don't try to be
+    # clever and replace this with sed code, as IRIX sed won't handle
+    # lines with more than a fixed number of characters (4096 in
+    # IRIX 6.2 sed, 8192 in IRIX 6.5).  We also remove comment lines;
+    # the IRIX cc adds comments like '#:fec' to the end of the
+    # dependency line.
+    tr ' ' "$nl" < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
+      | tr "$nl" ' ' >> "$depfile"
+    echo >> "$depfile"
+    # The second pass generates a dummy entry for each header file.
+    tr ' ' "$nl" < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
+      >> "$depfile"
+  else
+    make_dummy_depfile
+  fi
+  rm -f "$tmpdepfile"
+  ;;
+
+xlc)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+aix)
+  # The C for AIX Compiler uses -M and outputs the dependencies
+  # in a .u file.  In older versions, this file always lives in the
+  # current directory.  Also, the AIX compiler puts '$object:' at the
+  # start of each line; $object doesn't have directory information.
+  # Version 6 uses the directory in both cases.
+  set_dir_from "$object"
+  set_base_from "$object"
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$base.u
+    tmpdepfile3=$dir.libs/$base.u
+    "$@" -Wc,-M
+  else
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$dir$base.u
+    tmpdepfile3=$dir$base.u
+    "$@" -M
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+    exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  aix_post_process_depfile
+  ;;
+
+tcc)
+  # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
+  # FIXME: That version still under development at the moment of writing.
+  #        Make that this statement remains true also for stable, released
+  #        versions.
+  # It will wrap lines (doesn't matter whether long or short) with a
+  # trailing '\', as in:
+  #
+  #   foo.o : \
+  #    foo.c \
+  #    foo.h \
+  #
+  # It will put a trailing '\' even on the last line, and will use leading
+  # spaces rather than leading tabs (at least since its commit 0394caf7
+  # "Emit spaces for -MD").
+  "$@" -MD -MF "$tmpdepfile"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
+  # We have to change lines of the first kind to '$object: \'.
+  sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
+  # And for each line of the second kind, we have to emit a 'dep.h:'
+  # dummy dependency, to avoid the deleted-header problem.
+  sed -n -e 's|^  *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+## The order of this option in the case statement is important, since the
+## shell code in configure will try each of these formats in the order
+## listed in this file.  A plain '-MD' option would be understood by many
+## compilers, so we must ensure this comes after the gcc and icc options.
+pgcc)
+  # Portland's C compiler understands '-MD'.
+  # Will always output deps to 'file.d' where file is the root name of the
+  # source file under compilation, even if file resides in a subdirectory.
+  # The object file name does not affect the name of the '.d' file.
+  # pgcc 10.2 will output
+  #    foo.o: sub/foo.c sub/foo.h
+  # and will wrap long lines using '\' :
+  #    foo.o: sub/foo.c ... \
+  #     sub/foo.h ... \
+  #     ...
+  set_dir_from "$object"
+  # Use the source, not the object, to determine the base name, since
+  # that's sadly what pgcc will do too.
+  set_base_from "$source"
+  tmpdepfile=$base.d
+
+  # For projects that build the same source file twice into different object
+  # files, the pgcc approach of using the *source* file root name can cause
+  # problems in parallel builds.  Use a locking strategy to avoid stomping on
+  # the same $tmpdepfile.
+  lockdir=$base.d-lock
+  trap "
+    echo '$0: caught signal, cleaning up...' >&2
+    rmdir '$lockdir'
+    exit 1
+  " 1 2 13 15
+  numtries=100
+  i=$numtries
+  while test $i -gt 0; do
+    # mkdir is a portable test-and-set.
+    if mkdir "$lockdir" 2>/dev/null; then
+      # This process acquired the lock.
+      "$@" -MD
+      stat=$?
+      # Release the lock.
+      rmdir "$lockdir"
+      break
+    else
+      # If the lock is being held by a different process, wait
+      # until the winning process is done or we timeout.
+      while test -d "$lockdir" && test $i -gt 0; do
+        sleep 1
+        i=`expr $i - 1`
+      done
+    fi
+    i=`expr $i - 1`
+  done
+  trap - 1 2 13 15
+  if test $i -le 0; then
+    echo "$0: failed to acquire lock after $numtries attempts" >&2
+    echo "$0: check lockdir '$lockdir'" >&2
+    exit 1
+  fi
+
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  # Each line is of the form `foo.o: dependent.h',
+  # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
+  # Do two passes, one to just change these to
+  # `$object: dependent.h' and one to simply `dependent.h:'.
+  sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp2)
+  # The "hp" stanza above does not work with aCC (C++) and HP's ia64
+  # compilers, which have integrated preprocessors.  The correct option
+  # to use with these is +Maked; it writes dependencies to a file named
+  # 'foo.d', which lands next to the object file, wherever that
+  # happens to be.
+  # Much of this is similar to the tru64 case; see comments there.
+  set_dir_from  "$object"
+  set_base_from "$object"
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir.libs/$base.d
+    "$@" -Wc,+Maked
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    "$@" +Maked
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+     rm -f "$tmpdepfile1" "$tmpdepfile2"
+     exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  if test -f "$tmpdepfile"; then
+    sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
+    # Add 'dependent.h:' lines.
+    sed -ne '2,${
+               s/^ *//
+               s/ \\*$//
+               s/$/:/
+               p
+             }' "$tmpdepfile" >> "$depfile"
+  else
+    make_dummy_depfile
+  fi
+  rm -f "$tmpdepfile" "$tmpdepfile2"
+  ;;
+
+tru64)
+  # The Tru64 compiler uses -MD to generate dependencies as a side
+  # effect.  'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
+  # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
+  # dependencies in 'foo.d' instead, so we check for that too.
+  # Subdirectories are respected.
+  set_dir_from  "$object"
+  set_base_from "$object"
+
+  if test "$libtool" = yes; then
+    # Libtool generates 2 separate objects for the 2 libraries.  These
+    # two compilations output dependencies in $dir.libs/$base.o.d and
+    # in $dir$base.o.d.  We have to check for both files, because
+    # one of the two compilations can be disabled.  We should prefer
+    # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
+    # automatically cleaned when .libs/ is deleted, while ignoring
+    # the former would cause a distcleancheck panic.
+    tmpdepfile1=$dir$base.o.d          # libtool 1.5
+    tmpdepfile2=$dir.libs/$base.o.d    # Likewise.
+    tmpdepfile3=$dir.libs/$base.d      # Compaq CCC V6.2-504
+    "$@" -Wc,-MD
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    tmpdepfile3=$dir$base.d
+    "$@" -MD
+  fi
+
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+    exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  # Same post-processing that is required for AIX mode.
+  aix_post_process_depfile
+  ;;
+
+msvc7)
+  if test "$libtool" = yes; then
+    showIncludes=-Wc,-showIncludes
+  else
+    showIncludes=-showIncludes
+  fi
+  "$@" $showIncludes > "$tmpdepfile"
+  stat=$?
+  grep -v '^Note: including file: ' "$tmpdepfile"
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  # The first sed program below extracts the file names and escapes
+  # backslashes for cygpath.  The second sed program outputs the file
+  # name when reading, but also accumulates all include files in the
+  # hold buffer in order to output them again at the end.  This only
+  # works with sed implementations that can handle large buffers.
+  sed < "$tmpdepfile" -n '
+/^Note: including file:  *\(.*\)/ {
+  s//\1/
+  s/\\/\\\\/g
+  p
+}' | $cygpath_u | sort -u | sed -n '
+s/ /\\ /g
+s/\(.*\)/'"$tab"'\1 \\/p
+s/.\(.*\) \\/\1:/
+H
+$ {
+  s/.*/'"$tab"'/
+  G
+  p
+}' >> "$depfile"
+  echo >> "$depfile" # make sure the fragment doesn't end with a backslash
+  rm -f "$tmpdepfile"
+  ;;
+
+msvc7msys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+#nosideeffect)
+  # This comment above is used by automake to tell side-effect
+  # dependency tracking mechanisms from slower ones.
+
+dashmstdout)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout, regardless of -o.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove '-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  test -z "$dashmflag" && dashmflag=-M
+  # Require at least two characters before searching for ':'
+  # in the target name.  This is to cope with DOS-style filenames:
+  # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
+  "$@" $dashmflag |
+    sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
+  rm -f "$depfile"
+  cat < "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this sed invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  tr ' ' "$nl" < "$tmpdepfile" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+dashXmstdout)
+  # This case only exists to satisfy depend.m4.  It is never actually
+  # run, as this mode is specially recognized in the preamble.
+  exit 1
+  ;;
+
+makedepend)
+  "$@" || exit $?
+  # Remove any Libtool call
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+  # X makedepend
+  shift
+  cleared=no eat=no
+  for arg
+  do
+    case $cleared in
+    no)
+      set ""; shift
+      cleared=yes ;;
+    esac
+    if test $eat = yes; then
+      eat=no
+      continue
+    fi
+    case "$arg" in
+    -D*|-I*)
+      set fnord "$@" "$arg"; shift ;;
+    # Strip any option that makedepend may not understand.  Remove
+    # the object too, otherwise makedepend will parse it as a source file.
+    -arch)
+      eat=yes ;;
+    -*|$object)
+      ;;
+    *)
+      set fnord "$@" "$arg"; shift ;;
+    esac
+  done
+  obj_suffix=`echo "$object" | sed 's/^.*\././'`
+  touch "$tmpdepfile"
+  ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
+  rm -f "$depfile"
+  # makedepend may prepend the VPATH from the source file name to the object.
+  # No need to regex-escape $object, excess matching of '.' is harmless.
+  sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process the last invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed '1,2d' "$tmpdepfile" \
+    | tr ' ' "$nl" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile" "$tmpdepfile".bak
+  ;;
+
+cpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove '-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  "$@" -E \
+    | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+             -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+    | sed '$ s: \\$::' > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  cat < "$tmpdepfile" >> "$depfile"
+  sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvisualcpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  IFS=" "
+  for arg
+  do
+    case "$arg" in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
+        set fnord "$@"
+        shift
+        shift
+        ;;
+    *)
+        set fnord "$@" "$arg"
+        shift
+        shift
+        ;;
+    esac
+  done
+  "$@" -E 2>/dev/null |
+  sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
+  echo "$tab" >> "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvcmsys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+none)
+  exec "$@"
+  ;;
+
+*)
+  echo "Unknown depmode $depmode" 1>&2
+  exit 1
+  ;;
+esac
+
+exit 0
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:

include/asio/doc/asio/examples.html

@@ -0,0 +1,61 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Examples</title>
+<link rel="stylesheet" href="../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../index.html" title="Asio">
+<link rel="up" href="../index.html" title="Asio">
+<link rel="prev" href="tutorial/boost_bind.html" title="boost::bind">
+<link rel="next" href="examples/cpp03_examples.html" title="C++03 Examples">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="tutorial/boost_bind.html"><img src="../prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../home.png" alt="Home"></a><a accesskey="n" href="examples/cpp03_examples.html"><img src="../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="asio.examples"></a><a class="link" href="examples.html" title="Examples">Examples</a>
+</h2></div></div></div>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+          <a class="link" href="examples/cpp03_examples.html" title="C++03 Examples">C++03 Examples</a>: Illustrates
+          the use of Asio using only C++03 language and library features. Where necessary,
+          the examples make use of selected Boost C++ libraries.
+        </li>
+<li class="listitem">
+          <a class="link" href="examples/cpp11_examples.html" title="C++11 Examples">C++11 Examples</a>: Contains
+          a limited set of the C++03 Asio examples, updated to use only C++11 library
+          and language facilities. These examples do not make direct use of Boost
+          C++ libraries. To show the changes between C++03 and C++11, these examples
+          include a diff between the C++03 and C++11 versions.
+        </li>
+<li class="listitem">
+          <a class="link" href="examples/cpp14_examples.html" title="C++14 Examples">C++14 Examples</a>: Contains
+          a limited set of the C++03 Asio examples, updated to use only C++14 library
+          and language facilities. These examples do not make direct use of Boost
+          C++ libraries.
+        </li>
+<li class="listitem">
+          <a class="link" href="examples/cpp17_examples.html" title="C++17 Examples">C++17 Examples</a>: Selected
+          examples illustrating C++17 usage in conjunction with Technical Specifications.
+        </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="tutorial/boost_bind.html"><img src="../prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../home.png" alt="Home"></a><a accesskey="n" href="examples/cpp03_examples.html"><img src="../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/examples/cpp03_examples.html

@@ -0,0 +1,636 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>C++03 Examples</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../examples.html" title="Examples">
+<link rel="prev" href="../examples.html" title="Examples">
+<link rel="next" href="cpp11_examples.html" title="C++11 Examples">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../examples.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../examples.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="cpp11_examples.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.examples.cpp03_examples"></a><a class="link" href="cpp03_examples.html" title="C++03 Examples">C++03 Examples</a>
+</h3></div></div></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h0"></a>
+        <span><a name="asio.examples.cpp03_examples.allocation"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.allocation">Allocation</a>
+      </h5>
+<p>
+        This example shows how to customise the allocation of memory associated with
+        asynchronous operations.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp03/allocation/server.cpp" target="_top">../src/examples/cpp03/allocation/server.cpp</a>
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h1"></a>
+        <span><a name="asio.examples.cpp03_examples.buffers"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.buffers">Buffers</a>
+      </h5>
+<p>
+        This example demonstrates how to create reference counted buffers that can
+        be used with socket read and write operations.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp03/buffers/reference_counted.cpp" target="_top">../src/examples/cpp03/buffers/reference_counted.cpp</a>
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h2"></a>
+        <span><a name="asio.examples.cpp03_examples.chat"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.chat">Chat</a>
+      </h5>
+<p>
+        This example implements a chat server and client. The programs use a custom
+        protocol with a fixed length message header and variable length message body.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/chat/chat_message.hpp" target="_top">../src/examples/cpp03/chat/chat_message.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/chat/chat_client.cpp" target="_top">../src/examples/cpp03/chat/chat_client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/chat/chat_server.cpp" target="_top">../src/examples/cpp03/chat/chat_server.cpp</a>
+          </li>
+</ul></div>
+<p>
+        The following POSIX-specific chat client demonstrates how to use the <a class="link" href="../reference/posix__stream_descriptor.html" title="posix::stream_descriptor">posix::stream_descriptor</a>
+        class to perform console input and output.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp03/chat/posix_chat_client.cpp" target="_top">../src/examples/cpp03/chat/posix_chat_client.cpp</a>
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h3"></a>
+        <span><a name="asio.examples.cpp03_examples.echo"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.echo">Echo</a>
+      </h5>
+<p>
+        A collection of simple clients and servers, showing the use of both synchronous
+        and asynchronous operations.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/echo/async_tcp_echo_server.cpp" target="_top">../src/examples/cpp03/echo/async_tcp_echo_server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/echo/async_udp_echo_server.cpp" target="_top">../src/examples/cpp03/echo/async_udp_echo_server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/echo/blocking_tcp_echo_client.cpp" target="_top">../src/examples/cpp03/echo/blocking_tcp_echo_client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/echo/blocking_tcp_echo_server.cpp" target="_top">../src/examples/cpp03/echo/blocking_tcp_echo_server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/echo/blocking_udp_echo_client.cpp" target="_top">../src/examples/cpp03/echo/blocking_udp_echo_client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/echo/blocking_udp_echo_server.cpp" target="_top">../src/examples/cpp03/echo/blocking_udp_echo_server.cpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h4"></a>
+        <span><a name="asio.examples.cpp03_examples.fork"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.fork">Fork</a>
+      </h5>
+<p>
+        These POSIX-specific examples show how to use Asio in conjunction with the
+        <code class="computeroutput">fork()</code> system call. The first example illustrates the steps
+        required to start a daemon process:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp03/fork/daemon.cpp" target="_top">../src/examples/cpp03/fork/daemon.cpp</a>
+          </li></ul></div>
+<p>
+        The second example demonstrates how it is possible to fork a process from
+        within a completion handler.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp03/fork/process_per_connection.cpp" target="_top">../src/examples/cpp03/fork/process_per_connection.cpp</a>
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h5"></a>
+        <span><a name="asio.examples.cpp03_examples.http_client"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.http_client">HTTP
+        Client</a>
+      </h5>
+<p>
+        Example programs implementing simple HTTP 1.0 clients. These examples show
+        how to use the <a class="link" href="../reference/read_until.html" title="read_until">read_until</a>
+        and <a class="link" href="../reference/async_read_until.html" title="async_read_until">async_read_until</a>
+        functions.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/client/sync_client.cpp" target="_top">../src/examples/cpp03/http/client/sync_client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/client/async_client.cpp" target="_top">../src/examples/cpp03/http/client/async_client.cpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h6"></a>
+        <span><a name="asio.examples.cpp03_examples.http_server"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.http_server">HTTP
+        Server</a>
+      </h5>
+<p>
+        This example illustrates the use of asio in a simple single-threaded server
+        implementation of HTTP 1.0. It demonstrates how to perform a clean shutdown
+        by cancelling all outstanding asynchronous operations.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/connection.cpp" target="_top">../src/examples/cpp03/http/server/connection.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/connection.hpp" target="_top">../src/examples/cpp03/http/server/connection.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/connection_manager.cpp" target="_top">../src/examples/cpp03/http/server/connection_manager.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/connection_manager.hpp" target="_top">../src/examples/cpp03/http/server/connection_manager.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/header.hpp" target="_top">../src/examples/cpp03/http/server/header.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/main.cpp" target="_top">../src/examples/cpp03/http/server/main.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/mime_types.cpp" target="_top">../src/examples/cpp03/http/server/mime_types.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/mime_types.hpp" target="_top">../src/examples/cpp03/http/server/mime_types.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/reply.cpp" target="_top">../src/examples/cpp03/http/server/reply.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/reply.hpp" target="_top">../src/examples/cpp03/http/server/reply.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/request.hpp" target="_top">../src/examples/cpp03/http/server/request.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/request_handler.cpp" target="_top">../src/examples/cpp03/http/server/request_handler.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/request_handler.hpp" target="_top">../src/examples/cpp03/http/server/request_handler.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/request_parser.cpp" target="_top">../src/examples/cpp03/http/server/request_parser.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/request_parser.hpp" target="_top">../src/examples/cpp03/http/server/request_parser.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/server.cpp" target="_top">../src/examples/cpp03/http/server/server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server/server.hpp" target="_top">../src/examples/cpp03/http/server/server.hpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h7"></a>
+        <span><a name="asio.examples.cpp03_examples.http_server_2"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.http_server_2">HTTP
+        Server 2</a>
+      </h5>
+<p>
+        An HTTP server using an io_context-per-CPU design.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/connection.cpp" target="_top">../src/examples/cpp03/http/server2/connection.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/connection.hpp" target="_top">../src/examples/cpp03/http/server2/connection.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/header.hpp" target="_top">../src/examples/cpp03/http/server2/header.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/io_context_pool.cpp" target="_top">../src/examples/cpp03/http/server2/io_context_pool.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/io_context_pool.hpp" target="_top">../src/examples/cpp03/http/server2/io_context_pool.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/main.cpp" target="_top">../src/examples/cpp03/http/server2/main.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/mime_types.cpp" target="_top">../src/examples/cpp03/http/server2/mime_types.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/mime_types.hpp" target="_top">../src/examples/cpp03/http/server2/mime_types.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/reply.cpp" target="_top">../src/examples/cpp03/http/server2/reply.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/reply.hpp" target="_top">../src/examples/cpp03/http/server2/reply.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/request.hpp" target="_top">../src/examples/cpp03/http/server2/request.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/request_handler.cpp" target="_top">../src/examples/cpp03/http/server2/request_handler.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/request_handler.hpp" target="_top">../src/examples/cpp03/http/server2/request_handler.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/request_parser.cpp" target="_top">../src/examples/cpp03/http/server2/request_parser.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/request_parser.hpp" target="_top">../src/examples/cpp03/http/server2/request_parser.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/server.cpp" target="_top">../src/examples/cpp03/http/server2/server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server2/server.hpp" target="_top">../src/examples/cpp03/http/server2/server.hpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h8"></a>
+        <span><a name="asio.examples.cpp03_examples.http_server_3"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.http_server_3">HTTP
+        Server 3</a>
+      </h5>
+<p>
+        An HTTP server using a single io_context and a thread pool calling <code class="computeroutput">io_context::run()</code>.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/connection.cpp" target="_top">../src/examples/cpp03/http/server3/connection.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/connection.hpp" target="_top">../src/examples/cpp03/http/server3/connection.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/header.hpp" target="_top">../src/examples/cpp03/http/server3/header.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/main.cpp" target="_top">../src/examples/cpp03/http/server3/main.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/mime_types.cpp" target="_top">../src/examples/cpp03/http/server3/mime_types.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/mime_types.hpp" target="_top">../src/examples/cpp03/http/server3/mime_types.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/reply.cpp" target="_top">../src/examples/cpp03/http/server3/reply.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/reply.hpp" target="_top">../src/examples/cpp03/http/server3/reply.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/request.hpp" target="_top">../src/examples/cpp03/http/server3/request.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/request_handler.cpp" target="_top">../src/examples/cpp03/http/server3/request_handler.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/request_handler.hpp" target="_top">../src/examples/cpp03/http/server3/request_handler.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/request_parser.cpp" target="_top">../src/examples/cpp03/http/server3/request_parser.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/request_parser.hpp" target="_top">../src/examples/cpp03/http/server3/request_parser.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/server.cpp" target="_top">../src/examples/cpp03/http/server3/server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server3/server.hpp" target="_top">../src/examples/cpp03/http/server3/server.hpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h9"></a>
+        <span><a name="asio.examples.cpp03_examples.http_server_4"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.http_server_4">HTTP
+        Server 4</a>
+      </h5>
+<p>
+        A single-threaded HTTP server implemented using stackless coroutines.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server4/file_handler.cpp" target="_top">../src/examples/cpp03/http/server4/file_handler.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server4/file_handler.hpp" target="_top">../src/examples/cpp03/http/server4/file_handler.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server4/header.hpp" target="_top">../src/examples/cpp03/http/server4/header.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server4/main.cpp" target="_top">../src/examples/cpp03/http/server4/main.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server4/mime_types.cpp" target="_top">../src/examples/cpp03/http/server4/mime_types.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server4/mime_types.hpp" target="_top">../src/examples/cpp03/http/server4/mime_types.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server4/reply.cpp" target="_top">../src/examples/cpp03/http/server4/reply.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server4/reply.hpp" target="_top">../src/examples/cpp03/http/server4/reply.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server4/request.hpp" target="_top">../src/examples/cpp03/http/server4/request.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server4/request_parser.cpp" target="_top">../src/examples/cpp03/http/server4/request_parser.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server4/request_parser.hpp" target="_top">../src/examples/cpp03/http/server4/request_parser.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server4/server.cpp" target="_top">../src/examples/cpp03/http/server4/server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/http/server4/server.hpp" target="_top">../src/examples/cpp03/http/server4/server.hpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h10"></a>
+        <span><a name="asio.examples.cpp03_examples.icmp"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.icmp">ICMP</a>
+      </h5>
+<p>
+        This example shows how to use raw sockets with ICMP to ping a remote host.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/icmp/ping.cpp" target="_top">../src/examples/cpp03/icmp/ping.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/icmp/ipv4_header.hpp" target="_top">../src/examples/cpp03/icmp/ipv4_header.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/icmp/icmp_header.hpp" target="_top">../src/examples/cpp03/icmp/icmp_header.hpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h11"></a>
+        <span><a name="asio.examples.cpp03_examples.invocation"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.invocation">Invocation</a>
+      </h5>
+<p>
+        This example shows how to customise handler invocation. Completion handlers
+        are added to a priority queue rather than executed immediately.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp03/invocation/prioritised_handlers.cpp" target="_top">../src/examples/cpp03/invocation/prioritised_handlers.cpp</a>
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h12"></a>
+        <span><a name="asio.examples.cpp03_examples.iostreams"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.iostreams">Iostreams</a>
+      </h5>
+<p>
+        Two examples showing how to use <a class="link" href="../reference/ip__tcp/iostream.html" title="ip::tcp::iostream">ip::tcp::iostream</a>.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/iostreams/daytime_client.cpp" target="_top">../src/examples/cpp03/iostreams/daytime_client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/iostreams/daytime_server.cpp" target="_top">../src/examples/cpp03/iostreams/daytime_server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/iostreams/http_client.cpp" target="_top">../src/examples/cpp03/iostreams/http_client.cpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h13"></a>
+        <span><a name="asio.examples.cpp03_examples.multicast"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.multicast">Multicast</a>
+      </h5>
+<p>
+        An example showing the use of multicast to transmit packets to a group of
+        subscribers.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/multicast/receiver.cpp" target="_top">../src/examples/cpp03/multicast/receiver.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/multicast/sender.cpp" target="_top">../src/examples/cpp03/multicast/sender.cpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h14"></a>
+        <span><a name="asio.examples.cpp03_examples.serialization"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.serialization">Serialization</a>
+      </h5>
+<p>
+        This example shows how Boost.Serialization can be used with asio to encode
+        and decode structures for transmission over a socket.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/serialization/client.cpp" target="_top">../src/examples/cpp03/serialization/client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/serialization/connection.hpp" target="_top">../src/examples/cpp03/serialization/connection.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/serialization/server.cpp" target="_top">../src/examples/cpp03/serialization/server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/serialization/stock.hpp" target="_top">../src/examples/cpp03/serialization/stock.hpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h15"></a>
+        <span><a name="asio.examples.cpp03_examples.services"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.services">Services</a>
+      </h5>
+<p>
+        This example demonstrates how to integrate custom functionality (in this
+        case, for logging) into asio's <a class="link" href="../reference/io_context.html" title="io_context">io_context</a>,
+        and how to use a custom service with <a class="link" href="../reference/basic_stream_socket.html" title="basic_stream_socket">basic_stream_socket&lt;&gt;</a>.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/services/basic_logger.hpp" target="_top">../src/examples/cpp03/services/basic_logger.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/services/daytime_client.cpp" target="_top">../src/examples/cpp03/services/daytime_client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/services/logger.hpp" target="_top">../src/examples/cpp03/services/logger.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/services/logger_service.cpp" target="_top">../src/examples/cpp03/services/logger_service.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/services/logger_service.hpp" target="_top">../src/examples/cpp03/services/logger_service.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/services/stream_socket_service.hpp" target="_top">../src/examples/cpp03/services/stream_socket_service.hpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h16"></a>
+        <span><a name="asio.examples.cpp03_examples.socks_4"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.socks_4">SOCKS
+        4</a>
+      </h5>
+<p>
+        Example client program implementing the SOCKS 4 protocol for communication
+        via a proxy.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/socks4/sync_client.cpp" target="_top">../src/examples/cpp03/socks4/sync_client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/socks4/socks4.hpp" target="_top">../src/examples/cpp03/socks4/socks4.hpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h17"></a>
+        <span><a name="asio.examples.cpp03_examples.ssl"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.ssl">SSL</a>
+      </h5>
+<p>
+        Example client and server programs showing the use of the <a class="link" href="../reference/ssl__stream.html" title="ssl::stream">ssl::stream&lt;&gt;</a>
+        template with asynchronous operations.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/ssl/client.cpp" target="_top">../src/examples/cpp03/ssl/client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/ssl/server.cpp" target="_top">../src/examples/cpp03/ssl/server.cpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h18"></a>
+        <span><a name="asio.examples.cpp03_examples.timeouts"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.timeouts">Timeouts</a>
+      </h5>
+<p>
+        A collection of examples showing how to cancel long running asynchronous
+        operations after a period of time.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/timeouts/async_tcp_client.cpp" target="_top">../src/examples/cpp03/timeouts/async_tcp_client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/timeouts/blocking_tcp_client.cpp" target="_top">../src/examples/cpp03/timeouts/blocking_tcp_client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/timeouts/blocking_token_tcp_client.cpp" target="_top">../src/examples/cpp03/timeouts/blocking_token_tcp_client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/timeouts/blocking_udp_client.cpp" target="_top">../src/examples/cpp03/timeouts/blocking_udp_client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/timeouts/server.cpp" target="_top">../src/examples/cpp03/timeouts/server.cpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h19"></a>
+        <span><a name="asio.examples.cpp03_examples.timers"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.timers">Timers</a>
+      </h5>
+<p>
+        Example showing how to customise basic_waitable_timer using a different clock
+        type.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp03/timers/time_t_timer.cpp" target="_top">../src/examples/cpp03/timers/time_t_timer.cpp</a>
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h20"></a>
+        <span><a name="asio.examples.cpp03_examples.porthopper"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.porthopper">Porthopper</a>
+      </h5>
+<p>
+        Example illustrating mixed synchronous and asynchronous operations, and how
+        to use Boost.Lambda with Asio.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/porthopper/protocol.hpp" target="_top">../src/examples/cpp03/porthopper/protocol.hpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/porthopper/client.cpp" target="_top">../src/examples/cpp03/porthopper/client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/porthopper/server.cpp" target="_top">../src/examples/cpp03/porthopper/server.cpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h21"></a>
+        <span><a name="asio.examples.cpp03_examples.nonblocking"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.nonblocking">Nonblocking</a>
+      </h5>
+<p>
+        Example demonstrating reactor-style operations for integrating a third-party
+        library that wants to perform the I/O operations itself.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp03/nonblocking/third_party_lib.cpp" target="_top">../src/examples/cpp03/nonblocking/third_party_lib.cpp</a>
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h22"></a>
+        <span><a name="asio.examples.cpp03_examples.spawn"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.spawn">Spawn</a>
+      </h5>
+<p>
+        Example of using the asio::spawn() function, a wrapper around the <a href="http://www.boost.org/doc/libs/release/libs/coroutine/index.html" target="_top">Boost.Coroutine</a>
+        library, to implement a chain of asynchronous operations using stackful coroutines.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp03/spawn/echo_server.cpp" target="_top">../src/examples/cpp03/spawn/echo_server.cpp</a>
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h23"></a>
+        <span><a name="asio.examples.cpp03_examples.unix_domain_sockets"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.unix_domain_sockets">UNIX
+        Domain Sockets</a>
+      </h5>
+<p>
+        Examples showing how to use UNIX domain (local) sockets.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/local/connect_pair.cpp" target="_top">../src/examples/cpp03/local/connect_pair.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/local/iostream_client.cpp" target="_top">../src/examples/cpp03/local/iostream_client.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/local/stream_server.cpp" target="_top">../src/examples/cpp03/local/stream_server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp03/local/stream_client.cpp" target="_top">../src/examples/cpp03/local/stream_client.cpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp03_examples.h24"></a>
+        <span><a name="asio.examples.cpp03_examples.windows"></a></span><a class="link" href="cpp03_examples.html#asio.examples.cpp03_examples.windows">Windows</a>
+      </h5>
+<p>
+        An example showing how to use the Windows-specific function <code class="computeroutput">TransmitFile</code>
+        with Asio.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp03/windows/transmit_file.cpp" target="_top">../src/examples/cpp03/windows/transmit_file.cpp</a>
+          </li></ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../examples.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../examples.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="cpp11_examples.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/examples/cpp11_examples.html

@@ -0,0 +1,451 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>C++11 Examples</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../examples.html" title="Examples">
+<link rel="prev" href="cpp03_examples.html" title="C++03 Examples">
+<link rel="next" href="cpp14_examples.html" title="C++14 Examples">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="cpp03_examples.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../examples.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="cpp14_examples.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.examples.cpp11_examples"></a><a class="link" href="cpp11_examples.html" title="C++11 Examples">C++11 Examples</a>
+</h3></div></div></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h0"></a>
+        <span><a name="asio.examples.cpp11_examples.allocation"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.allocation">Allocation</a>
+      </h5>
+<p>
+        This example shows how to customise the allocation of memory associated with
+        asynchronous operations.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp11/allocation/server.cpp" target="_top">../src/examples/cpp11/allocation/server.cpp</a>
+            (<a href="../../examples/diffs/allocation/server.cpp.html" target="_top">diff to C++03</a>)
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h1"></a>
+        <span><a name="asio.examples.cpp11_examples.buffers"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.buffers">Buffers</a>
+      </h5>
+<p>
+        This example demonstrates how to create reference counted buffers that can
+        be used with socket read and write operations.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp11/buffers/reference_counted.cpp" target="_top">../src/examples/cpp11/buffers/reference_counted.cpp</a>
+            (<a href="../../examples/diffs/buffers/reference_counted.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h2"></a>
+        <span><a name="asio.examples.cpp11_examples.chat"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.chat">Chat</a>
+      </h5>
+<p>
+        This example implements a chat server and client. The programs use a custom
+        protocol with a fixed length message header and variable length message body.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/chat/chat_message.hpp" target="_top">../src/examples/cpp11/chat/chat_message.hpp</a>
+            (<a href="../../examples/diffs/chat/chat_message.hpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/chat/chat_client.cpp" target="_top">../src/examples/cpp11/chat/chat_client.cpp</a>
+            (<a href="../../examples/diffs/chat/chat_client.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/chat/chat_server.cpp" target="_top">../src/examples/cpp11/chat/chat_server.cpp</a>
+            (<a href="../../examples/diffs/chat/chat_server.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h3"></a>
+        <span><a name="asio.examples.cpp11_examples.echo"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.echo">Echo</a>
+      </h5>
+<p>
+        A collection of simple clients and servers, showing the use of both synchronous
+        and asynchronous operations.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/echo/async_tcp_echo_server.cpp" target="_top">../src/examples/cpp11/echo/async_tcp_echo_server.cpp</a>
+            (<a href="../../examples/diffs/echo/async_tcp_echo_server.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/echo/async_udp_echo_server.cpp" target="_top">../src/examples/cpp11/echo/async_udp_echo_server.cpp</a>
+            (<a href="../../examples/diffs/echo/async_udp_echo_server.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/echo/blocking_tcp_echo_client.cpp" target="_top">../src/examples/cpp11/echo/blocking_tcp_echo_client.cpp</a>
+            (<a href="../../examples/diffs/echo/blocking_tcp_echo_client.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/echo/blocking_tcp_echo_server.cpp" target="_top">../src/examples/cpp11/echo/blocking_tcp_echo_server.cpp</a>
+            (<a href="../../examples/diffs/echo/blocking_tcp_echo_server.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/echo/blocking_udp_echo_client.cpp" target="_top">../src/examples/cpp11/echo/blocking_udp_echo_client.cpp</a>
+            (<a href="../../examples/diffs/echo/blocking_udp_echo_client.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/echo/blocking_udp_echo_server.cpp" target="_top">../src/examples/cpp11/echo/blocking_udp_echo_server.cpp</a>
+            (<a href="../../examples/diffs/echo/blocking_udp_echo_server.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h4"></a>
+        <span><a name="asio.examples.cpp11_examples.fork"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.fork">Fork</a>
+      </h5>
+<p>
+        These POSIX-specific examples show how to use Asio in conjunction with the
+        <code class="computeroutput">fork()</code> system call. The first example illustrates the steps
+        required to start a daemon process:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp11/fork/daemon.cpp" target="_top">../src/examples/cpp11/fork/daemon.cpp</a>
+            (<a href="../../examples/diffs/fork/daemon.cpp.html" target="_top">diff to C++03</a>)
+          </li></ul></div>
+<p>
+        The second example demonstrates how it is possible to fork a process from
+        within a completion handler.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp11/fork/process_per_connection.cpp" target="_top">../src/examples/cpp11/fork/process_per_connection.cpp</a>
+            (<a href="../../examples/diffs/fork/process_per_connection.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h5"></a>
+        <span><a name="asio.examples.cpp11_examples.futures"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.futures">Futures</a>
+      </h5>
+<p>
+        This example demonstrates how to use std::future in conjunction with Asio's
+        asynchronous operations.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp11/futures/daytime_client.cpp" target="_top">../src/examples/cpp11/futures/daytime_client.cpp</a>
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h6"></a>
+        <span><a name="asio.examples.cpp11_examples.handler_tracking"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.handler_tracking">Handler
+        Tracking</a>
+      </h5>
+<p>
+        This example header file shows how to implement custom handler tracking.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp11/handler_tracking/custom_tracking.hpp" target="_top">../src/examples/cpp11/handler_tracking/custom_tracking.hpp</a>
+          </li></ul></div>
+<p>
+        This example program shows how to include source location information in
+        the handler tracking output.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp11/handler_tracking/async_tcp_echo_server.cpp" target="_top">../src/examples/cpp11/handler_tracking/async_tcp_echo_server.cpp</a>
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h7"></a>
+        <span><a name="asio.examples.cpp11_examples.http_server"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.http_server">HTTP
+        Server</a>
+      </h5>
+<p>
+        This example illustrates the use of asio in a simple single-threaded server
+        implementation of HTTP 1.0. It demonstrates how to perform a clean shutdown
+        by cancelling all outstanding asynchronous operations.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/connection.cpp" target="_top">../src/examples/cpp11/http/server/connection.cpp</a>
+            (<a href="../../examples/diffs/http/server/connection.cpp.html" target="_top">diff to
+            C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/connection.hpp" target="_top">../src/examples/cpp11/http/server/connection.hpp</a>
+            (<a href="../../examples/diffs/http/server/connection.hpp.html" target="_top">diff to
+            C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/connection_manager.cpp" target="_top">../src/examples/cpp11/http/server/connection_manager.cpp</a>
+            (<a href="../../examples/diffs/http/server/connection_manager.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/connection_manager.hpp" target="_top">../src/examples/cpp11/http/server/connection_manager.hpp</a>
+            (<a href="../../examples/diffs/http/server/connection_manager.hpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/header.hpp" target="_top">../src/examples/cpp11/http/server/header.hpp</a>
+            (<a href="../../examples/diffs/http/server/header.hpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/main.cpp" target="_top">../src/examples/cpp11/http/server/main.cpp</a>
+            (<a href="../../examples/diffs/http/server/main.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/mime_types.cpp" target="_top">../src/examples/cpp11/http/server/mime_types.cpp</a>
+            (<a href="../../examples/diffs/http/server/mime_types.cpp.html" target="_top">diff to
+            C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/mime_types.hpp" target="_top">../src/examples/cpp11/http/server/mime_types.hpp</a>
+            (<a href="../../examples/diffs/http/server/mime_types.hpp.html" target="_top">diff to
+            C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/reply.cpp" target="_top">../src/examples/cpp11/http/server/reply.cpp</a>
+            (<a href="../../examples/diffs/http/server/reply.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/reply.hpp" target="_top">../src/examples/cpp11/http/server/reply.hpp</a>
+            (<a href="../../examples/diffs/http/server/reply.hpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/request.hpp" target="_top">../src/examples/cpp11/http/server/request.hpp</a>
+            (<a href="../../examples/diffs/http/server/request.hpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/request_handler.cpp" target="_top">../src/examples/cpp11/http/server/request_handler.cpp</a>
+            (<a href="../../examples/diffs/http/server/request_handler.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/request_handler.hpp" target="_top">../src/examples/cpp11/http/server/request_handler.hpp</a>
+            (<a href="../../examples/diffs/http/server/request_handler.hpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/request_parser.cpp" target="_top">../src/examples/cpp11/http/server/request_parser.cpp</a>
+            (<a href="../../examples/diffs/http/server/request_parser.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/request_parser.hpp" target="_top">../src/examples/cpp11/http/server/request_parser.hpp</a>
+            (<a href="../../examples/diffs/http/server/request_parser.hpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/server.cpp" target="_top">../src/examples/cpp11/http/server/server.cpp</a>
+            (<a href="../../examples/diffs/http/server/server.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/http/server/server.hpp" target="_top">../src/examples/cpp11/http/server/server.hpp</a>
+            (<a href="../../examples/diffs/http/server/server.hpp.html" target="_top">diff to C++03</a>)
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h8"></a>
+        <span><a name="asio.examples.cpp11_examples.multicast"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.multicast">Multicast</a>
+      </h5>
+<p>
+        An example showing the use of multicast to transmit packets to a group of
+        subscribers.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/multicast/receiver.cpp" target="_top">../src/examples/cpp11/multicast/receiver.cpp</a>
+            (<a href="../../examples/diffs/multicast/receiver.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/multicast/sender.cpp" target="_top">../src/examples/cpp11/multicast/sender.cpp</a>
+            (<a href="../../examples/diffs/multicast/sender.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h9"></a>
+        <span><a name="asio.examples.cpp11_examples.nonblocking"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.nonblocking">Nonblocking</a>
+      </h5>
+<p>
+        Example demonstrating reactor-style operations for integrating a third-party
+        library that wants to perform the I/O operations itself.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp11/nonblocking/third_party_lib.cpp" target="_top">../src/examples/cpp11/nonblocking/third_party_lib.cpp</a>
+            (<a href="../../examples/diffs/nonblocking/third_party_lib.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h10"></a>
+        <span><a name="asio.examples.cpp11_examples.operations"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.operations">Operations</a>
+      </h5>
+<p>
+        Examples showing how to implement composed asynchronous operations as reusable
+        library functions.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/operations/composed_1.cpp" target="_top">../src/examples/cpp11/operations/composed_1.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/operations/composed_2.cpp" target="_top">../src/examples/cpp11/operations/composed_2.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/operations/composed_3.cpp" target="_top">../src/examples/cpp11/operations/composed_3.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/operations/composed_4.cpp" target="_top">../src/examples/cpp11/operations/composed_4.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/operations/composed_5.cpp" target="_top">../src/examples/cpp11/operations/composed_5.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/operations/composed_6.cpp" target="_top">../src/examples/cpp11/operations/composed_6.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/operations/composed_7.cpp" target="_top">../src/examples/cpp11/operations/composed_7.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/operations/composed_8.cpp" target="_top">../src/examples/cpp11/operations/composed_8.cpp</a>
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h11"></a>
+        <span><a name="asio.examples.cpp11_examples.socks_4"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.socks_4">SOCKS
+        4</a>
+      </h5>
+<p>
+        Example client program implementing the SOCKS 4 protocol for communication
+        via a proxy.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/socks4/sync_client.cpp" target="_top">../src/examples/cpp11/socks4/sync_client.cpp</a>
+            (<a href="../../examples/diffs/socks4/sync_client.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/socks4/socks4.hpp" target="_top">../src/examples/cpp11/socks4/socks4.hpp</a>
+            (<a href="../../examples/diffs/socks4/socks4.hpp.html" target="_top">diff to C++03</a>)
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h12"></a>
+        <span><a name="asio.examples.cpp11_examples.spawn"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.spawn">Spawn</a>
+      </h5>
+<p>
+        Example of using the asio::spawn() function, a wrapper around the <a href="http://www.boost.org/doc/libs/release/libs/coroutine/index.html" target="_top">Boost.Coroutine</a>
+        library, to implement a chain of asynchronous operations using stackful coroutines.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp11/spawn/echo_server.cpp" target="_top">../src/examples/cpp11/spawn/echo_server.cpp</a>
+            (<a href="../../examples/diffs/spawn/echo_server.cpp.html" target="_top">diff to C++03</a>)
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h13"></a>
+        <span><a name="asio.examples.cpp11_examples.ssl"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.ssl">SSL</a>
+      </h5>
+<p>
+        Example client and server programs showing the use of the <a class="link" href="../reference/ssl__stream.html" title="ssl::stream">ssl::stream&lt;&gt;</a>
+        template with asynchronous operations.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/ssl/client.cpp" target="_top">../src/examples/cpp11/ssl/client.cpp</a>
+            (<a href="../../examples/diffs/ssl/client.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/ssl/server.cpp" target="_top">../src/examples/cpp11/ssl/server.cpp</a>
+            (<a href="../../examples/diffs/ssl/server.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h14"></a>
+        <span><a name="asio.examples.cpp11_examples.timeouts"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.timeouts">Timeouts</a>
+      </h5>
+<p>
+        A collection of examples showing how to cancel long running asynchronous
+        operations after a period of time.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/timeouts/async_tcp_client.cpp" target="_top">../src/examples/cpp11/timeouts/async_tcp_client.cpp</a>
+            (<a href="../../examples/diffs/timeouts/async_tcp_client.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/timeouts/blocking_tcp_client.cpp" target="_top">../src/examples/cpp11/timeouts/blocking_tcp_client.cpp</a>
+            (<a href="../../examples/diffs/timeouts/blocking_tcp_client.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/timeouts/blocking_token_tcp_client.cpp" target="_top">../src/examples/cpp11/timeouts/blocking_token_tcp_client.cpp</a>
+            (<a href="../../examples/diffs/timeouts/blocking_token_tcp_client.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/timeouts/blocking_udp_client.cpp" target="_top">../src/examples/cpp11/timeouts/blocking_udp_client.cpp</a>
+            (<a href="../../examples/diffs/timeouts/blocking_udp_client.cpp.html" target="_top">diff
+            to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/timeouts/server.cpp" target="_top">../src/examples/cpp11/timeouts/server.cpp</a>
+            (<a href="../../examples/diffs/timeouts/server.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+</ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h15"></a>
+        <span><a name="asio.examples.cpp11_examples.timers"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.timers">Timers</a>
+      </h5>
+<p>
+        Example showing how to customise basic_waitable_timer using a different clock
+        type.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a href="../../../src/examples/cpp11/timers/time_t_timer.cpp" target="_top">../src/examples/cpp11/timers/time_t_timer.cpp</a>
+            (<a href="../../examples/diffs/timers/time_t_timer.cpp.html" target="_top">diff to C++03</a>)
+          </li></ul></div>
+<h5>
+<a name="asio.examples.cpp11_examples.h16"></a>
+        <span><a name="asio.examples.cpp11_examples.unix_domain_sockets"></a></span><a class="link" href="cpp11_examples.html#asio.examples.cpp11_examples.unix_domain_sockets">UNIX
+        Domain Sockets</a>
+      </h5>
+<p>
+        Examples showing how to use UNIX domain (local) sockets.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/local/connect_pair.cpp" target="_top">../src/examples/cpp11/local/connect_pair.cpp</a>
+            (<a href="../../examples/diffs/local/connect_pair.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/local/iostream_client.cpp" target="_top">../src/examples/cpp11/local/iostream_client.cpp</a>
+            (<a href="../../examples/diffs/local/iostream_client.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/local/stream_server.cpp" target="_top">../src/examples/cpp11/local/stream_server.cpp</a>
+            (<a href="../../examples/diffs/local/stream_server.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp11/local/stream_client.cpp" target="_top">../src/examples/cpp11/local/stream_client.cpp</a>
+            (<a href="../../examples/diffs/local/stream_client.cpp.html" target="_top">diff to C++03</a>)
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="cpp03_examples.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../examples.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="cpp14_examples.html"><img src="../../next.png" alt="Next"></a>
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include/asio/doc/asio/examples/cpp14_examples.html

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+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>C++14 Examples</title>
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+<a name="asio.examples.cpp14_examples"></a><a class="link" href="cpp14_examples.html" title="C++14 Examples">C++14 Examples</a>
+</h3></div></div></div>
+<h5>
+<a name="asio.examples.cpp14_examples.h0"></a>
+        <span><a name="asio.examples.cpp14_examples.operations"></a></span><a class="link" href="cpp14_examples.html#asio.examples.cpp14_examples.operations">Operations</a>
+      </h5>
+<p>
+        Examples showing how to implement composed asynchronous operations as reusable
+        library functions.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp14/operations/composed_1.cpp" target="_top">../src/examples/cpp14/operations/composed_1.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp14/operations/composed_2.cpp" target="_top">../src/examples/cpp14/operations/composed_2.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp14/operations/composed_3.cpp" target="_top">../src/examples/cpp14/operations/composed_3.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp14/operations/composed_4.cpp" target="_top">../src/examples/cpp14/operations/composed_4.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp14/operations/composed_5.cpp" target="_top">../src/examples/cpp14/operations/composed_5.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp14/operations/composed_6.cpp" target="_top">../src/examples/cpp14/operations/composed_6.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp14/operations/composed_7.cpp" target="_top">../src/examples/cpp14/operations/composed_7.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp14/operations/composed_8.cpp" target="_top">../src/examples/cpp14/operations/composed_8.cpp</a>
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="cpp11_examples.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../examples.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="cpp17_examples.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/examples/cpp17_examples.html

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+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>C++17 Examples</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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+<link rel="next" href="../reference.html" title="Reference">
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+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.examples.cpp17_examples"></a><a class="link" href="cpp17_examples.html" title="C++17 Examples">C++17 Examples</a>
+</h3></div></div></div>
+<h5>
+<a name="asio.examples.cpp17_examples.h0"></a>
+        <span><a name="asio.examples.cpp17_examples.coroutines_ts_support"></a></span><a class="link" href="cpp17_examples.html#asio.examples.cpp17_examples.coroutines_ts_support">Coroutines
+        TS Support</a>
+      </h5>
+<p>
+        Examples showing how to implement a chain of asynchronous operations using
+        the Coroutines TS.
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a href="../../../src/examples/cpp17/coroutines_ts/echo_server.cpp" target="_top">../src/examples/cpp17/coroutines_ts/echo_server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp17/coroutines_ts/refactored_echo_server.cpp" target="_top">../src/examples/cpp17/coroutines_ts/refactored_echo_server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp17/coroutines_ts/double_buffered_echo_server.cpp" target="_top">../src/examples/cpp17/coroutines_ts/double_buffered_echo_server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp17/coroutines_ts/chat_server.cpp" target="_top">../src/examples/cpp17/coroutines_ts/chat_server.cpp</a>
+          </li>
+<li class="listitem">
+            <a href="../../../src/examples/cpp17/coroutines_ts/range_based_for.cpp" target="_top">../src/examples/cpp17/coroutines_ts/range_based_for.cpp</a>
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="cpp14_examples.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../examples.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="../reference.html"><img src="../../next.png" alt="Next"></a>
+</div>
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+</html>

include/asio/doc/asio/overview.html

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+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Overview</title>
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+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="asio.overview"></a><a class="link" href="overview.html" title="Overview">Overview</a>
+</h2></div></div></div>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+          <a class="link" href="overview/rationale.html" title="Rationale">Rationale</a>
+        </li>
+<li class="listitem">
+          <a class="link" href="overview/core.html" title="Core Concepts and Functionality">Core Concepts and Functionality</a>
+          <div class="itemizedlist"><ul class="itemizedlist" type="circle">
+<li class="listitem">
+                <a class="link" href="overview/core/basics.html" title="Basic Asio Anatomy">Basic Asio Anatomy</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/core/async.html" title="The Proactor Design Pattern: Concurrency Without Threads">The Proactor Design Pattern:
+                Concurrency Without Threads</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/core/threads.html" title="Threads and Asio">Threads and Asio</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/core/strands.html" title="Strands: Use Threads Without Explicit Locking">Strands: Use Threads Without
+                Explicit Locking</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/core/buffers.html" title="Buffers">Buffers</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/core/streams.html" title="Streams, Short Reads and Short Writes">Streams, Short Reads and
+                Short Writes</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/core/reactor.html" title="Reactor-Style Operations">Reactor-Style Operations</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/core/line_based.html" title="Line-Based Operations">Line-Based Operations</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/core/allocation.html" title="Custom Memory Allocation">Custom Memory Allocation</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/core/handler_tracking.html" title="Handler Tracking">Handler Tracking</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/core/concurrency_hint.html" title="Concurrency Hints">Concurrency Hints</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/core/coroutine.html" title="Stackless Coroutines">Stackless Coroutines</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/core/spawn.html" title="Stackful Coroutines">Stackful Coroutines</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/core/coroutines_ts.html" title="Coroutines TS Support">Coroutines TS Support</a>
+              </li>
+</ul></div>
+        </li>
+<li class="listitem">
+          <a class="link" href="overview/networking.html" title="Networking">Networking</a>
+          <div class="itemizedlist"><ul class="itemizedlist" type="circle">
+<li class="listitem">
+                <a class="link" href="overview/networking/protocols.html" title="TCP, UDP and ICMP">TCP, UDP and ICMP</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/networking/other_protocols.html" title="Support for Other Protocols">Support
+                for Other Protocols</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/networking/iostreams.html" title="Socket Iostreams">Socket Iostreams</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/networking/bsd_sockets.html" title="The BSD Socket API and Asio">The BSD Socket
+                API and Asio</a>
+              </li>
+</ul></div>
+        </li>
+<li class="listitem">
+          <a class="link" href="overview/timers.html" title="Timers">Timers</a>
+        </li>
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+          <a class="link" href="overview/serial_ports.html" title="Serial Ports">Serial Ports</a>
+        </li>
+<li class="listitem">
+          <a class="link" href="overview/signals.html" title="Signal Handling">Signal Handling</a>
+        </li>
+<li class="listitem">
+          <a class="link" href="overview/posix.html" title="POSIX-Specific Functionality">POSIX-Specific Functionality</a>
+          <div class="itemizedlist"><ul class="itemizedlist" type="circle">
+<li class="listitem">
+                <a class="link" href="overview/posix/local.html" title="UNIX Domain Sockets">UNIX Domain Sockets</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/posix/stream_descriptor.html" title="Stream-Oriented File Descriptors">Stream-Oriented
+                File Descriptors</a>
+              </li>
+</ul></div>
+        </li>
+<li class="listitem">
+          <a class="link" href="overview/windows.html" title="Windows-Specific Functionality">Windows-Specific Functionality</a>
+          <div class="itemizedlist"><ul class="itemizedlist" type="circle">
+<li class="listitem">
+                <a class="link" href="overview/windows/stream_handle.html" title="Stream-Oriented HANDLEs">Stream-Oriented
+                HANDLEs</a>
+              </li>
+<li class="listitem">
+                <a class="link" href="overview/windows/random_access_handle.html" title="Random-Access HANDLEs">Random-Access
+                HANDLEs</a>
+              </li>
+</ul></div>
+        </li>
+<li class="listitem">
+          <a class="link" href="overview/ssl.html" title="SSL">SSL</a>
+        </li>
+<li class="listitem">
+          <a class="link" href="overview/cpp2011.html" title="C++ 2011 Support">C++ 2011 Support</a>
+        </li>
+<li class="listitem">
+          <a class="link" href="overview/implementation.html" title="Platform-Specific Implementation Notes">Platform-Specific Implementation
+          Notes</a>
+        </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
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+</div>
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+</html>

include/asio/doc/asio/overview/core.html

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+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Core Concepts and Functionality</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
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+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.overview.core"></a><a class="link" href="core.html" title="Core Concepts and Functionality">Core Concepts and Functionality</a>
+</h3></div></div></div>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a class="link" href="core/basics.html" title="Basic Asio Anatomy">Basic Asio Anatomy</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="core/async.html" title="The Proactor Design Pattern: Concurrency Without Threads">The Proactor Design Pattern:
+            Concurrency Without Threads</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="core/threads.html" title="Threads and Asio">Threads and Asio</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="core/strands.html" title="Strands: Use Threads Without Explicit Locking">Strands: Use Threads Without
+            Explicit Locking</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="core/buffers.html" title="Buffers">Buffers</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="core/streams.html" title="Streams, Short Reads and Short Writes">Streams, Short Reads and Short
+            Writes</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="core/reactor.html" title="Reactor-Style Operations">Reactor-Style Operations</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="core/line_based.html" title="Line-Based Operations">Line-Based Operations</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="core/allocation.html" title="Custom Memory Allocation">Custom Memory Allocation</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="core/handler_tracking.html" title="Handler Tracking">Handler Tracking</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="core/concurrency_hint.html" title="Concurrency Hints">Concurrency Hints</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="core/coroutine.html" title="Stackless Coroutines">Stackless Coroutines</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="core/spawn.html" title="Stackful Coroutines">Stackful Coroutines</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="core/coroutines_ts.html" title="Coroutines TS Support">Coroutines TS Support</a>
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="rationale.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="core/basics.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/allocation.html

@@ -0,0 +1,136 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Custom Memory Allocation</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="line_based.html" title="Line-Based Operations">
+<link rel="next" href="handler_tracking.html" title="Handler Tracking">
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+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="line_based.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="handler_tracking.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.allocation"></a><a class="link" href="allocation.html" title="Custom Memory Allocation">Custom Memory Allocation</a>
+</h4></div></div></div>
+<p>
+          Many asynchronous operations need to allocate an object to store state
+          associated with the operation. For example, a Win32 implementation needs
+          <code class="computeroutput"><span class="identifier">OVERLAPPED</span></code>-derived objects
+          to pass to Win32 API functions.
+        </p>
+<p>
+          Furthermore, programs typically contain easily identifiable chains of asynchronous
+          operations. A half duplex protocol implementation (e.g. an HTTP server)
+          would have a single chain of operations per client (receives followed by
+          sends). A full duplex protocol implementation would have two chains executing
+          in parallel. Programs should be able to leverage this knowledge to reuse
+          memory for all asynchronous operations in a chain.
+        </p>
+<p>
+          Given a copy of a user-defined <code class="computeroutput"><span class="identifier">Handler</span></code>
+          object <code class="computeroutput"><span class="identifier">h</span></code>, if the implementation
+          needs to allocate memory associated with that handler it will obtain an
+          allocator using the <code class="computeroutput"><span class="identifier">get_associated_allocator</span></code>
+          function. For example:
+        </p>
+<pre class="programlisting"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">associated_allocator_t</span><span class="special">&lt;</span><span class="identifier">Handler</span><span class="special">&gt;</span> <span class="identifier">a</span> <span class="special">=</span> <span class="identifier">asio</span><span class="special">::</span><span class="identifier">get_associated_allocator</span><span class="special">(</span><span class="identifier">h</span><span class="special">);</span>
+</pre>
+<p>
+          The associated allocator must satisfy the standard Allocator requirements.
+        </p>
+<p>
+          By default, handlers use the standard allocator (which is implemented in
+          terms of <code class="computeroutput"><span class="special">::</span><span class="keyword">operator</span>
+          <span class="keyword">new</span><span class="special">()</span></code>
+          and <code class="computeroutput"><span class="special">::</span><span class="keyword">operator</span>
+          <span class="keyword">delete</span><span class="special">()</span></code>).
+          The allocator may be customised for a particular handler type by specifying
+          a nested type <code class="computeroutput"><span class="identifier">allocator_type</span></code>
+          and member function <code class="computeroutput"><span class="identifier">get_allocator</span><span class="special">()</span></code>:
+        </p>
+<pre class="programlisting"><span class="keyword">class</span> <span class="identifier">my_handler</span>
+<span class="special">{</span>
+<span class="keyword">public</span><span class="special">:</span>
+  <span class="comment">// Custom implementation of Allocator type requirements.</span>
+  <span class="keyword">typedef</span> <span class="identifier">my_allocator</span> <span class="identifier">allocator_type</span><span class="special">;</span>
+
+  <span class="comment">// Return a custom allocator implementation.</span>
+  <span class="identifier">allocator_type</span> <span class="identifier">get_allocator</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span>
+  <span class="special">{</span>
+    <span class="keyword">return</span> <span class="identifier">my_allocator</span><span class="special">();</span>
+  <span class="special">}</span>
+
+  <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()()</span> <span class="special">{</span> <span class="special">...</span> <span class="special">}</span>
+<span class="special">};</span>
+</pre>
+<p>
+          In more complex cases, the <code class="computeroutput"><span class="identifier">associated_allocator</span></code>
+          template may be partially specialised directly:
+        </p>
+<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">asio</span> <span class="special">{</span>
+
+  <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Allocator</span><span class="special">&gt;</span>
+  <span class="keyword">struct</span> <span class="identifier">associated_allocator</span><span class="special">&lt;</span><span class="identifier">my_handler</span><span class="special">,</span> <span class="identifier">Allocator</span><span class="special">&gt;</span>
+  <span class="special">{</span>
+    <span class="comment">// Custom implementation of Allocator type requirements.</span>
+    <span class="keyword">typedef</span> <span class="identifier">my_allocator</span> <span class="identifier">type</span><span class="special">;</span>
+
+    <span class="comment">// Return a custom allocator implementation.</span>
+    <span class="keyword">static</span> <span class="identifier">type</span> <span class="identifier">get</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">my_handler</span><span class="special">&amp;,</span>
+        <span class="keyword">const</span> <span class="identifier">Allocator</span><span class="special">&amp;</span> <span class="identifier">a</span> <span class="special">=</span> <span class="identifier">Allocator</span><span class="special">())</span> <span class="keyword">noexcept</span>
+    <span class="special">{</span>
+      <span class="keyword">return</span> <span class="identifier">my_allocator</span><span class="special">();</span>
+    <span class="special">}</span>
+  <span class="special">};</span>
+
+<span class="special">}</span> <span class="comment">// namespace asio</span>
+</pre>
+<p>
+          The implementation guarantees that the deallocation will occur before the
+          associated handler is invoked, which means the memory is ready to be reused
+          for any new asynchronous operations started by the handler.
+        </p>
+<p>
+          The custom memory allocation functions may be called from any user-created
+          thread that is calling a library function. The implementation guarantees
+          that, for the asynchronous operations included the library, the implementation
+          will not make concurrent calls to the memory allocation functions for that
+          handler. The implementation will insert appropriate memory barriers to
+          ensure correct memory visibility should allocation functions need to be
+          called from different threads.
+        </p>
+<h6>
+<a name="asio.overview.core.allocation.h0"></a>
+          <span><a name="asio.overview.core.allocation.see_also"></a></span><a class="link" href="allocation.html#asio.overview.core.allocation.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/associated_allocator.html" title="associated_allocator">associated_allocator</a>,
+          <a class="link" href="../../reference/get_associated_allocator.html" title="get_associated_allocator">get_associated_allocator</a>,
+          <a class="link" href="../../examples/cpp03_examples.html#asio.examples.cpp03_examples.allocation">custom memory allocation
+          example (C++03)</a>, <a class="link" href="../../examples/cpp11_examples.html#asio.examples.cpp11_examples.allocation">custom
+          memory allocation example (C++11)</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="line_based.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="handler_tracking.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/async.html

@@ -0,0 +1,280 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>The Proactor Design Pattern: Concurrency Without Threads</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="basics.html" title="Basic Asio Anatomy">
+<link rel="next" href="threads.html" title="Threads and Asio">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="basics.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="threads.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.async"></a><a class="link" href="async.html" title="The Proactor Design Pattern: Concurrency Without Threads">The Proactor Design Pattern:
+        Concurrency Without Threads</a>
+</h4></div></div></div>
+<p>
+          The Asio library offers side-by-side support for synchronous and asynchronous
+          operations. The asynchronous support is based on the Proactor design pattern
+          <a class="link" href="async.html#asio.overview.core.async.references">[POSA2]</a>. The
+          advantages and disadvantages of this approach, when compared to a synchronous-only
+          or Reactor approach, are outlined below.
+        </p>
+<h6>
+<a name="asio.overview.core.async.h0"></a>
+          <span><a name="asio.overview.core.async.proactor_and_asio"></a></span><a class="link" href="async.html#asio.overview.core.async.proactor_and_asio">Proactor
+          and Asio</a>
+        </h6>
+<p>
+          Let us examine how the Proactor design pattern is implemented in Asio,
+          without reference to platform-specific details.
+        </p>
+<p>
+          <span class="inlinemediaobject"><img src="../../../proactor.png" alt="proactor"></span>
+        </p>
+<p>
+          <span class="bold"><strong>Proactor design pattern (adapted from [POSA2])</strong></span>
+        </p>
+<p>
+          — Asynchronous Operation
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Defines an operation that is executed asynchronously, such as an asynchronous
+            read or write on a socket.
+          </p></blockquote></div>
+<p>
+          — Asynchronous Operation Processor
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Executes asynchronous operations and queues events on a completion event
+            queue when operations complete. From a high-level point of view, internal
+            services like <code class="computeroutput"><span class="identifier">reactive_socket_service</span></code>
+            are asynchronous operation processors.
+          </p></blockquote></div>
+<p>
+          — Completion Event Queue
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Buffers completion events until they are dequeued by an asynchronous
+            event demultiplexer.
+          </p></blockquote></div>
+<p>
+          — Completion Handler
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Processes the result of an asynchronous operation. These are function
+            objects, often created using <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">bind</span></code>.
+          </p></blockquote></div>
+<p>
+          — Asynchronous Event Demultiplexer
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Blocks waiting for events to occur on the completion event queue, and
+            returns a completed event to its caller.
+          </p></blockquote></div>
+<p>
+          — Proactor
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Calls the asynchronous event demultiplexer to dequeue events, and dispatches
+            the completion handler (i.e. invokes the function object) associated
+            with the event. This abstraction is represented by the <code class="computeroutput"><span class="identifier">io_context</span></code> class.
+          </p></blockquote></div>
+<p>
+          — Initiator
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Application-specific code that starts asynchronous operations. The initiator
+            interacts with an asynchronous operation processor via a high-level interface
+            such as <code class="computeroutput"><span class="identifier">basic_stream_socket</span></code>,
+            which in turn delegates to a service like <code class="computeroutput"><span class="identifier">reactive_socket_service</span></code>.
+          </p></blockquote></div>
+<h6>
+<a name="asio.overview.core.async.h1"></a>
+          <span><a name="asio.overview.core.async.implementation_using_reactor"></a></span><a class="link" href="async.html#asio.overview.core.async.implementation_using_reactor">Implementation
+          Using Reactor</a>
+        </h6>
+<p>
+          On many platforms, Asio implements the Proactor design pattern in terms
+          of a Reactor, such as <code class="computeroutput"><span class="identifier">select</span></code>,
+          <code class="computeroutput"><span class="identifier">epoll</span></code> or <code class="computeroutput"><span class="identifier">kqueue</span></code>. This implementation approach
+          corresponds to the Proactor design pattern as follows:
+        </p>
+<p>
+          — Asynchronous Operation Processor
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            A reactor implemented using <code class="computeroutput"><span class="identifier">select</span></code>,
+            <code class="computeroutput"><span class="identifier">epoll</span></code> or <code class="computeroutput"><span class="identifier">kqueue</span></code>. When the reactor indicates
+            that the resource is ready to perform the operation, the processor executes
+            the asynchronous operation and enqueues the associated completion handler
+            on the completion event queue.
+          </p></blockquote></div>
+<p>
+          — Completion Event Queue
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            A linked list of completion handlers (i.e. function objects).
+          </p></blockquote></div>
+<p>
+          — Asynchronous Event Demultiplexer
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            This is implemented by waiting on an event or condition variable until
+            a completion handler is available in the completion event queue.
+          </p></blockquote></div>
+<h6>
+<a name="asio.overview.core.async.h2"></a>
+          <span><a name="asio.overview.core.async.implementation_using_windows_overlapped_i_o"></a></span><a class="link" href="async.html#asio.overview.core.async.implementation_using_windows_overlapped_i_o">Implementation
+          Using Windows Overlapped I/O</a>
+        </h6>
+<p>
+          On Windows NT, 2000 and XP, Asio takes advantage of overlapped I/O to provide
+          an efficient implementation of the Proactor design pattern. This implementation
+          approach corresponds to the Proactor design pattern as follows:
+        </p>
+<p>
+          — Asynchronous Operation Processor
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            This is implemented by the operating system. Operations are initiated
+            by calling an overlapped function such as <code class="computeroutput"><span class="identifier">AcceptEx</span></code>.
+          </p></blockquote></div>
+<p>
+          — Completion Event Queue
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            This is implemented by the operating system, and is associated with an
+            I/O completion port. There is one I/O completion port for each <code class="computeroutput"><span class="identifier">io_context</span></code> instance.
+          </p></blockquote></div>
+<p>
+          — Asynchronous Event Demultiplexer
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Called by Asio to dequeue events and their associated completion handlers.
+          </p></blockquote></div>
+<h6>
+<a name="asio.overview.core.async.h3"></a>
+          <span><a name="asio.overview.core.async.advantages"></a></span><a class="link" href="async.html#asio.overview.core.async.advantages">Advantages</a>
+        </h6>
+<p>
+          — Portability.
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Many operating systems offer a native asynchronous I/O API (such as overlapped
+            I/O on <span class="emphasis"><em>Windows</em></span>) as the preferred option for developing
+            high performance network applications. The library may be implemented
+            in terms of native asynchronous I/O. However, if native support is not
+            available, the library may also be implemented using synchronous event
+            demultiplexors that typify the Reactor pattern, such as <span class="emphasis"><em>POSIX</em></span>
+            <code class="computeroutput"><span class="identifier">select</span><span class="special">()</span></code>.
+          </p></blockquote></div>
+<p>
+          — Decoupling threading from concurrency.
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Long-duration operations are performed asynchronously by the implementation
+            on behalf of the application. Consequently applications do not need to
+            spawn many threads in order to increase concurrency.
+          </p></blockquote></div>
+<p>
+          — Performance and scalability.
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Implementation strategies such as thread-per-connection (which a synchronous-only
+            approach would require) can degrade system performance, due to increased
+            context switching, synchronisation and data movement among CPUs. With
+            asynchronous operations it is possible to avoid the cost of context switching
+            by minimising the number of operating system threads — typically a limited
+            resource — and only activating the logical threads of control that have
+            events to process.
+          </p></blockquote></div>
+<p>
+          — Simplified application synchronisation.
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Asynchronous operation completion handlers can be written as though they
+            exist in a single-threaded environment, and so application logic can
+            be developed with little or no concern for synchronisation issues.
+          </p></blockquote></div>
+<p>
+          — Function composition.
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Function composition refers to the implementation of functions to provide
+            a higher-level operation, such as sending a message in a particular format.
+            Each function is implemented in terms of multiple calls to lower-level
+            read or write operations.
+          </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            For example, consider a protocol where each message consists of a fixed-length
+            header followed by a variable length body, where the length of the body
+            is specified in the header. A hypothetical read_message operation could
+            be implemented using two lower-level reads, the first to receive the
+            header and, once the length is known, the second to receive the body.
+          </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            To compose functions in an asynchronous model, asynchronous operations
+            can be chained together. That is, a completion handler for one operation
+            can initiate the next. Starting the first call in the chain can be encapsulated
+            so that the caller need not be aware that the higher-level operation
+            is implemented as a chain of asynchronous operations.
+          </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            The ability to compose new operations in this way simplifies the development
+            of higher levels of abstraction above a networking library, such as functions
+            to support a specific protocol.
+          </p></blockquote></div>
+<h6>
+<a name="asio.overview.core.async.h4"></a>
+          <span><a name="asio.overview.core.async.disadvantages"></a></span><a class="link" href="async.html#asio.overview.core.async.disadvantages">Disadvantages</a>
+        </h6>
+<p>
+          — Program complexity.
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            It is more difficult to develop applications using asynchronous mechanisms
+            due to the separation in time and space between operation initiation
+            and completion. Applications may also be harder to debug due to the inverted
+            flow of control.
+          </p></blockquote></div>
+<p>
+          — Memory usage.
+        </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+            Buffer space must be committed for the duration of a read or write operation,
+            which may continue indefinitely, and a separate buffer is required for
+            each concurrent operation. The Reactor pattern, on the other hand, does
+            not require buffer space until a socket is ready for reading or writing.
+          </p></blockquote></div>
+<h6>
+<a name="asio.overview.core.async.h5"></a>
+          <span><a name="asio.overview.core.async.references"></a></span><a class="link" href="async.html#asio.overview.core.async.references">References</a>
+        </h6>
+<p>
+          [POSA2] D. Schmidt et al, <span class="emphasis"><em>Pattern Oriented Software Architecture,
+          Volume 2</em></span>. Wiley, 2000.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="basics.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="threads.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/basics.html

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+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Basic Asio Anatomy</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="../core.html" title="Core Concepts and Functionality">
+<link rel="next" href="async.html" title="The Proactor Design Pattern: Concurrency Without Threads">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../core.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="async.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.basics"></a><a class="link" href="basics.html" title="Basic Asio Anatomy">Basic Asio Anatomy</a>
+</h4></div></div></div>
+<p>
+          Asio may be used to perform both synchronous and asynchronous operations
+          on I/O objects such as sockets. Before using Asio it may be useful to get
+          a conceptual picture of the various parts of Asio, your program, and how
+          they work together.
+        </p>
+<p>
+          As an introductory example, let's consider what happens when you perform
+          a connect operation on a socket. We shall start by examining synchronous
+          operations.
+        </p>
+<p>
+          <span class="inlinemediaobject"><img src="../../../sync_op.png" alt="sync_op"></span>
+        </p>
+<p>
+          <span class="bold"><strong>Your program</strong></span> will have at least one <span class="bold"><strong>I/O execution context</strong></span>, such as an <code class="computeroutput"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_context</span></code> object, <code class="computeroutput"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">thread_pool</span></code>
+          object, or <code class="computeroutput"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">system_context</span></code>. This <span class="bold"><strong>I/O
+          execution context</strong></span> represents <span class="bold"><strong>your program</strong></span>'s
+          link to the <span class="bold"><strong>operating system</strong></span>'s I/O services.
+        </p>
+<pre class="programlisting"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_context</span> <span class="identifier">io_context</span><span class="special">;</span>
+</pre>
+<p>
+          To perform I/O operations <span class="bold"><strong>your program</strong></span>
+          will need an <span class="bold"><strong>I/O object</strong></span> such as a TCP
+          socket:
+        </p>
+<pre class="programlisting"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">ip</span><span class="special">::</span><span class="identifier">tcp</span><span class="special">::</span><span class="identifier">socket</span> <span class="identifier">socket</span><span class="special">(</span><span class="identifier">io_context</span><span class="special">);</span>
+</pre>
+<p>
+          When a synchronous connect operation is performed, the following sequence
+          of events occurs:
+        </p>
+<p>
+          1. <span class="bold"><strong>Your program</strong></span> initiates the connect
+          operation by calling the <span class="bold"><strong>I/O object</strong></span>:
+        </p>
+<pre class="programlisting"><span class="identifier">socket</span><span class="special">.</span><span class="identifier">connect</span><span class="special">(</span><span class="identifier">server_endpoint</span><span class="special">);</span>
+</pre>
+<p>
+          2. The <span class="bold"><strong>I/O object</strong></span> forwards the request
+          to the <span class="bold"><strong>I/O execution context</strong></span>.
+        </p>
+<p>
+          3. The <span class="bold"><strong>I/O execution context</strong></span> calls on
+          the <span class="bold"><strong>operating system</strong></span> to perform the connect
+          operation.
+        </p>
+<p>
+          4. The <span class="bold"><strong>operating system</strong></span> returns the result
+          of the operation to the <span class="bold"><strong>I/O execution context</strong></span>.
+        </p>
+<p>
+          5. The <span class="bold"><strong>I/O execution context</strong></span> translates
+          any error resulting from the operation into an object of type <code class="computeroutput"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span></code>. An <code class="computeroutput"><span class="identifier">error_code</span></code>
+          may be compared with specific values, or tested as a boolean (where a
+          <code class="computeroutput"><span class="keyword">false</span></code> result means that no
+          error occurred). The result is then forwarded back up to the <span class="bold"><strong>I/O object</strong></span>.
+        </p>
+<p>
+          6. The <span class="bold"><strong>I/O object</strong></span> throws an exception
+          of type <code class="computeroutput"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">system_error</span></code> if the operation failed.
+          If the code to initiate the operation had instead been written as:
+        </p>
+<pre class="programlisting"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="identifier">ec</span><span class="special">;</span>
+<span class="identifier">socket</span><span class="special">.</span><span class="identifier">connect</span><span class="special">(</span><span class="identifier">server_endpoint</span><span class="special">,</span> <span class="identifier">ec</span><span class="special">);</span>
+</pre>
+<p>
+          then the <code class="computeroutput"><span class="identifier">error_code</span></code> variable
+          <code class="computeroutput"><span class="identifier">ec</span></code> would be set to the
+          result of the operation, and no exception would be thrown.
+        </p>
+<p>
+          When an asynchronous operation is used, a different sequence of events
+          occurs.
+        </p>
+<p>
+          <span class="inlinemediaobject"><img src="../../../async_op1.png" alt="async_op1"></span>
+        </p>
+<p>
+          1. <span class="bold"><strong>Your program</strong></span> initiates the connect
+          operation by calling the <span class="bold"><strong>I/O object</strong></span>:
+        </p>
+<pre class="programlisting"><span class="identifier">socket</span><span class="special">.</span><span class="identifier">async_connect</span><span class="special">(</span><span class="identifier">server_endpoint</span><span class="special">,</span> <span class="identifier">your_completion_handler</span><span class="special">);</span>
+</pre>
+<p>
+          where <code class="computeroutput"><span class="identifier">your_completion_handler</span></code>
+          is a function or function object with the signature:
+        </p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">your_completion_handler</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span><span class="special">&amp;</span> <span class="identifier">ec</span><span class="special">);</span>
+</pre>
+<p>
+          The exact signature required depends on the asynchronous operation being
+          performed. The reference documentation indicates the appropriate form for
+          each operation.
+        </p>
+<p>
+          2. The <span class="bold"><strong>I/O object</strong></span> forwards the request
+          to the <span class="bold"><strong>I/O execution context</strong></span>.
+        </p>
+<p>
+          3. The <span class="bold"><strong>I/O execution context</strong></span> signals to
+          the <span class="bold"><strong>operating system</strong></span> that it should start
+          an asynchronous connect.
+        </p>
+<p>
+          Time passes. (In the synchronous case this wait would have been contained
+          entirely within the duration of the connect operation.)
+        </p>
+<p>
+          <span class="inlinemediaobject"><img src="../../../async_op2.png" alt="async_op2"></span>
+        </p>
+<p>
+          4. The <span class="bold"><strong>operating system</strong></span> indicates that
+          the connect operation has completed by placing the result on a queue, ready
+          to be picked up by the <span class="bold"><strong>I/O execution context</strong></span>.
+        </p>
+<p>
+          5. When using an <code class="computeroutput"><span class="identifier">io_context</span></code>
+          as the <span class="bold"><strong>I/O execution context</strong></span>, <span class="bold"><strong>your program</strong></span> must make a call to <code class="computeroutput"><span class="identifier">io_context</span><span class="special">::</span><span class="identifier">run</span><span class="special">()</span></code> (or to one of the similar <code class="computeroutput"><span class="identifier">io_context</span></code> member functions) in order
+          for the result to be retrieved. A call to <code class="computeroutput"><span class="identifier">io_context</span><span class="special">::</span><span class="identifier">run</span><span class="special">()</span></code> blocks while there are unfinished asynchronous
+          operations, so you would typically call it as soon as you have started
+          your first asynchronous operation.
+        </p>
+<p>
+          6. While inside the call to <code class="computeroutput"><span class="identifier">io_context</span><span class="special">::</span><span class="identifier">run</span><span class="special">()</span></code>, the <span class="bold"><strong>I/O execution
+          context</strong></span> dequeues the result of the operation, translates it
+          into an <code class="computeroutput"><span class="identifier">error_code</span></code>, and
+          then passes it to <span class="bold"><strong>your completion handler</strong></span>.
+        </p>
+<p>
+          This is a simplified picture of how Asio operates. You will want to delve
+          further into the documentation if your needs are more advanced, such as
+          extending Asio to perform other types of asynchronous operations.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../core.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="async.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/buffers.html

@@ -0,0 +1,235 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Buffers</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="strands.html" title="Strands: Use Threads Without Explicit Locking">
+<link rel="next" href="streams.html" title="Streams, Short Reads and Short Writes">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="strands.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="streams.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.buffers"></a><a class="link" href="buffers.html" title="Buffers">Buffers</a>
+</h4></div></div></div>
+<p>
+          Fundamentally, I/O involves the transfer of data to and from contiguous
+          regions of memory, called buffers. These buffers can be simply expressed
+          as a tuple consisting of a pointer and a size in bytes. However, to allow
+          the development of efficient network applications, Asio includes support
+          for scatter-gather operations. These operations involve one or more buffers:
+        </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+              A scatter-read receives data into multiple buffers.
+            </li>
+<li class="listitem">
+              A gather-write transmits multiple buffers.
+            </li>
+</ul></div>
+<p>
+          Therefore we require an abstraction to represent a collection of buffers.
+          The approach used in Asio is to define a type (actually two types) to represent
+          a single buffer. These can be stored in a container, which may be passed
+          to the scatter-gather operations.
+        </p>
+<p>
+          In addition to specifying buffers as a pointer and size in bytes, Asio
+          makes a distinction between modifiable memory (called mutable) and non-modifiable
+          memory (where the latter is created from the storage for a const-qualified
+          variable). These two types could therefore be defined as follows:
+        </p>
+<pre class="programlisting"><span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">&gt;</span> <span class="identifier">mutable_buffer</span><span class="special">;</span>
+<span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">void</span><span class="special">*,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">&gt;</span> <span class="identifier">const_buffer</span><span class="special">;</span>
+</pre>
+<p>
+          Here, a mutable_buffer would be convertible to a const_buffer, but conversion
+          in the opposite direction is not valid.
+        </p>
+<p>
+          However, Asio does not use the above definitions as-is, but instead defines
+          two classes: <code class="computeroutput"><span class="identifier">mutable_buffer</span></code>
+          and <code class="computeroutput"><span class="identifier">const_buffer</span></code>. The goal
+          of these is to provide an opaque representation of contiguous memory, where:
+        </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+              Types behave as std::pair would in conversions. That is, a <code class="computeroutput"><span class="identifier">mutable_buffer</span></code> is convertible to
+              a <code class="computeroutput"><span class="identifier">const_buffer</span></code>, but
+              the opposite conversion is disallowed.
+            </li>
+<li class="listitem">
+              There is protection against buffer overruns. Given a buffer instance,
+              a user can only create another buffer representing the same range of
+              memory or a sub-range of it. To provide further safety, the library
+              also includes mechanisms for automatically determining the size of
+              a buffer from an array, <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">array</span></code>
+              or <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span></code> of POD elements, or from a
+              <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span></code>.
+            </li>
+<li class="listitem">
+              The underlying memory is explicitly accessed using the <code class="computeroutput"><span class="identifier">data</span><span class="special">()</span></code>
+              member function. In general an application should never need to do
+              this, but it is required by the library implementation to pass the
+              raw memory to the underlying operating system functions.
+            </li>
+</ul></div>
+<p>
+          Finally, multiple buffers can be passed to scatter-gather operations (such
+          as <a class="link" href="../../reference/read.html" title="read">read()</a> or <a class="link" href="../../reference/write.html" title="write">write()</a>)
+          by putting the buffer objects into a container. The <code class="computeroutput"><span class="identifier">MutableBufferSequence</span></code>
+          and <code class="computeroutput"><span class="identifier">ConstBufferSequence</span></code>
+          concepts have been defined so that containers such as <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span></code>,
+          <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">list</span></code>, <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">array</span></code>
+          or <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">array</span></code> can be used.
+        </p>
+<h6>
+<a name="asio.overview.core.buffers.h0"></a>
+          <span><a name="asio.overview.core.buffers.streambuf_for_integration_with_iostreams"></a></span><a class="link" href="buffers.html#asio.overview.core.buffers.streambuf_for_integration_with_iostreams">Streambuf
+          for Integration with Iostreams</a>
+        </h6>
+<p>
+          The class <code class="computeroutput"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">basic_streambuf</span></code> is derived from <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_streambuf</span></code> to associate the input
+          sequence and output sequence with one or more objects of some character
+          array type, whose elements store arbitrary values. These character array
+          objects are internal to the streambuf object, but direct access to the
+          array elements is provided to permit them to be used with I/O operations,
+          such as the send or receive operations of a socket:
+        </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+              The input sequence of the streambuf is accessible via the <a class="link" href="../../reference/basic_streambuf/data.html" title="basic_streambuf::data">data()</a>
+              member function. The return type of this function meets the <code class="computeroutput"><span class="identifier">ConstBufferSequence</span></code> requirements.
+            </li>
+<li class="listitem">
+              The output sequence of the streambuf is accessible via the <a class="link" href="../../reference/basic_streambuf/prepare.html" title="basic_streambuf::prepare">prepare()</a>
+              member function. The return type of this function meets the <code class="computeroutput"><span class="identifier">MutableBufferSequence</span></code> requirements.
+            </li>
+<li class="listitem">
+              Data is transferred from the front of the output sequence to the back
+              of the input sequence by calling the <a class="link" href="../../reference/basic_streambuf/commit.html" title="basic_streambuf::commit">commit()</a>
+              member function.
+            </li>
+<li class="listitem">
+              Data is removed from the front of the input sequence by calling the
+              <a class="link" href="../../reference/basic_streambuf/consume.html" title="basic_streambuf::consume">consume()</a>
+              member function.
+            </li>
+</ul></div>
+<p>
+          The streambuf constructor accepts a <code class="computeroutput"><span class="identifier">size_t</span></code>
+          argument specifying the maximum of the sum of the sizes of the input sequence
+          and output sequence. Any operation that would, if successful, grow the
+          internal data beyond this limit will throw a <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">length_error</span></code>
+          exception.
+        </p>
+<h6>
+<a name="asio.overview.core.buffers.h1"></a>
+          <span><a name="asio.overview.core.buffers.bytewise_traversal_of_buffer_sequences"></a></span><a class="link" href="buffers.html#asio.overview.core.buffers.bytewise_traversal_of_buffer_sequences">Bytewise
+          Traversal of Buffer Sequences</a>
+        </h6>
+<p>
+          The <code class="computeroutput"><span class="identifier">buffers_iterator</span><span class="special">&lt;&gt;</span></code>
+          class template allows buffer sequences (i.e. types meeting <code class="computeroutput"><span class="identifier">MutableBufferSequence</span></code> or <code class="computeroutput"><span class="identifier">ConstBufferSequence</span></code> requirements) to
+          be traversed as though they were a contiguous sequence of bytes. Helper
+          functions called buffers_begin() and buffers_end() are also provided, where
+          the buffers_iterator&lt;&gt; template parameter is automatically deduced.
+        </p>
+<p>
+          As an example, to read a single line from a socket and into a <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span></code>, you may write:
+        </p>
+<pre class="programlisting"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">streambuf</span> <span class="identifier">sb</span><span class="special">;</span>
+<span class="special">...</span>
+<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">n</span> <span class="special">=</span> <span class="identifier">asio</span><span class="special">::</span><span class="identifier">read_until</span><span class="special">(</span><span class="identifier">sock</span><span class="special">,</span> <span class="identifier">sb</span><span class="special">,</span> <span class="char">'\n'</span><span class="special">);</span>
+<span class="identifier">asio</span><span class="special">::</span><span class="identifier">streambuf</span><span class="special">::</span><span class="identifier">const_buffers_type</span> <span class="identifier">bufs</span> <span class="special">=</span> <span class="identifier">sb</span><span class="special">.</span><span class="identifier">data</span><span class="special">();</span>
+<span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">line</span><span class="special">(</span>
+    <span class="identifier">asio</span><span class="special">::</span><span class="identifier">buffers_begin</span><span class="special">(</span><span class="identifier">bufs</span><span class="special">),</span>
+    <span class="identifier">asio</span><span class="special">::</span><span class="identifier">buffers_begin</span><span class="special">(</span><span class="identifier">bufs</span><span class="special">)</span> <span class="special">+</span> <span class="identifier">n</span><span class="special">);</span>
+</pre>
+<h6>
+<a name="asio.overview.core.buffers.h2"></a>
+          <span><a name="asio.overview.core.buffers.buffer_debugging"></a></span><a class="link" href="buffers.html#asio.overview.core.buffers.buffer_debugging">Buffer
+          Debugging</a>
+        </h6>
+<p>
+          Some standard library implementations, such as the one that ships with
+          Microsoft Visual C++ 8.0 and later, provide a feature called iterator debugging.
+          What this means is that the validity of iterators is checked at runtime.
+          If a program tries to use an iterator that has been invalidated, an assertion
+          will be triggered. For example:
+        </p>
+<pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">v</span><span class="special">(</span><span class="number">1</span><span class="special">)</span>
+<span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">iterator</span> <span class="identifier">i</span> <span class="special">=</span> <span class="identifier">v</span><span class="special">.</span><span class="identifier">begin</span><span class="special">();</span>
+<span class="identifier">v</span><span class="special">.</span><span class="identifier">clear</span><span class="special">();</span> <span class="comment">// invalidates iterators</span>
+<span class="special">*</span><span class="identifier">i</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span> <span class="comment">// assertion!</span>
+</pre>
+<p>
+          Asio takes advantage of this feature to add buffer debugging. Consider
+          the following code:
+        </p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">dont_do_this</span><span class="special">()</span>
+<span class="special">{</span>
+ <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">msg</span> <span class="special">=</span> <span class="string">"Hello, world!"</span><span class="special">;</span>
+ <span class="identifier">asio</span><span class="special">::</span><span class="identifier">async_write</span><span class="special">(</span><span class="identifier">sock</span><span class="special">,</span> <span class="identifier">asio</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">(</span><span class="identifier">msg</span><span class="special">),</span> <span class="identifier">my_handler</span><span class="special">);</span>
+<span class="special">}</span>
+</pre>
+<p>
+          When you call an asynchronous read or write you need to ensure that the
+          buffers for the operation are valid until the completion handler is called.
+          In the above example, the buffer is the <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span></code>
+          variable <code class="computeroutput"><span class="identifier">msg</span></code>. This variable
+          is on the stack, and so it goes out of scope before the asynchronous operation
+          completes. If you're lucky then the application will crash, but random
+          failures are more likely.
+        </p>
+<p>
+          When buffer debugging is enabled, Asio stores an iterator into the string
+          until the asynchronous operation completes, and then dereferences it to
+          check its validity. In the above example you would observe an assertion
+          failure just before Asio tries to call the completion handler.
+        </p>
+<p>
+          This feature is automatically made available for Microsoft Visual Studio
+          8.0 or later and for GCC when <code class="computeroutput"><span class="identifier">_GLIBCXX_DEBUG</span></code>
+          is defined. There is a performance cost to this checking, so buffer debugging
+          is only enabled in debug builds. For other compilers it may be enabled
+          by defining <code class="computeroutput"><span class="identifier">ASIO_ENABLE_BUFFER_DEBUGGING</span></code>.
+          It can also be explicitly disabled by defining <code class="computeroutput"><span class="identifier">ASIO_DISABLE_BUFFER_DEBUGGING</span></code>.
+        </p>
+<h6>
+<a name="asio.overview.core.buffers.h3"></a>
+          <span><a name="asio.overview.core.buffers.see_also"></a></span><a class="link" href="buffers.html#asio.overview.core.buffers.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/buffer.html" title="buffer">buffer</a>, <a class="link" href="../../reference/buffers_begin.html" title="buffers_begin">buffers_begin</a>,
+          <a class="link" href="../../reference/buffers_end.html" title="buffers_end">buffers_end</a>, <a class="link" href="../../reference/buffers_iterator.html" title="buffers_iterator">buffers_iterator</a>,
+          <a class="link" href="../../reference/const_buffer.html" title="const_buffer">const_buffer</a>, <a class="link" href="../../reference/const_buffers_1.html" title="const_buffers_1">const_buffers_1</a>, <a class="link" href="../../reference/mutable_buffer.html" title="mutable_buffer">mutable_buffer</a>, <a class="link" href="../../reference/mutable_buffers_1.html" title="mutable_buffers_1">mutable_buffers_1</a>,
+          <a class="link" href="../../reference/streambuf.html" title="streambuf">streambuf</a>, <a class="link" href="../../reference/ConstBufferSequence.html" title="Constant buffer sequence requirements">ConstBufferSequence</a>,
+          <a class="link" href="../../reference/MutableBufferSequence.html" title="Mutable buffer sequence requirements">MutableBufferSequence</a>,
+          <a class="link" href="../../examples/cpp03_examples.html#asio.examples.cpp03_examples.buffers">buffers example (C++03)</a>,
+          <a class="link" href="../../examples/cpp11_examples.html#asio.examples.cpp11_examples.buffers">buffers example (c++11)</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="strands.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="streams.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/concurrency_hint.html

@@ -0,0 +1,168 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Concurrency Hints</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="handler_tracking.html" title="Handler Tracking">
+<link rel="next" href="coroutine.html" title="Stackless Coroutines">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="handler_tracking.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="coroutine.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.concurrency_hint"></a><a class="link" href="concurrency_hint.html" title="Concurrency Hints">Concurrency Hints</a>
+</h4></div></div></div>
+<p>
+          The <a class="link" href="../../reference/io_context/io_context.html" title="io_context::io_context"><code class="computeroutput"><span class="identifier">io_context</span></code> constructor</a> allows
+          programs to specify a concurrency hint. This is a suggestion to the <code class="computeroutput"><span class="identifier">io_context</span></code> implementation as to the number
+          of active threads that should be used for running completion handlers.
+        </p>
+<p>
+          When the Windows I/O completion port backend is in use, this value is passed
+          to <code class="literal">CreateIoCompletionPort</code>.
+        </p>
+<p>
+          When a reactor-based backend is used, the implementation recognises the
+          following special concurrency hint values:
+        </p>
+<div class="informaltable"><table class="table">
+<colgroup>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                  <p>
+                    Value
+                  </p>
+                </th>
+<th>
+                  <p>
+                    Description
+                  </p>
+                </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="number">1</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    The implementation assumes that the <code class="computeroutput"><span class="identifier">io_context</span></code>
+                    will be run from a single thread, and applies several optimisations
+                    based on this assumption.
+                  </p>
+                  <p>
+                    For example, when a handler is posted from within another handler,
+                    the new handler is added to a fast thread-local queue (with the
+                    consequence that the new handler is held back until the currently
+                    executing handler finishes).
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_CONCURRENCY_HINT_UNSAFE</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    This special concurrency hint disables locking in both the scheduler
+                    and reactor I/O. This hint has the following restrictions:
+                  </p>
+                  <p>
+                    — Care must be taken to ensure that all operations on the <code class="computeroutput"><span class="identifier">io_context</span></code> and any of its associated
+                    I/O objects (such as sockets and timers) occur in only one thread
+                    at a time.
+                  </p>
+                  <p>
+                    — Asynchronous resolve operations fail with <code class="computeroutput"><span class="identifier">operation_not_supported</span></code>.
+                  </p>
+                  <p>
+                    — If a <code class="computeroutput"><span class="identifier">signal_set</span></code>
+                    is used with the <code class="computeroutput"><span class="identifier">io_context</span></code>,
+                    <code class="computeroutput"><span class="identifier">signal_set</span></code> objects
+                    cannot be used with any other io_context in the program.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_CONCURRENCY_HINT_UNSAFE_IO</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    This special concurrency hint disables locking in the reactor
+                    I/O. This hint has the following restrictions:
+                  </p>
+                  <p>
+                    — Care must be taken to ensure that run functions on the <code class="computeroutput"><span class="identifier">io_context</span></code>, and all operations
+                    on the context's associated I/O objects (such as sockets and
+                    timers), occur in only one thread at a time.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_CONCURRENCY_HINT_SAFE</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    The default. The <code class="computeroutput"><span class="identifier">io_context</span></code>
+                    provides full thread safety, and distinct I/O objects may be
+                    used from any thread.
+                  </p>
+                </td>
+</tr>
+</tbody>
+</table></div>
+<p>
+          The concurrency hint used by default-constructed <code class="computeroutput">io_context</code>
+          objects can be overridden at compile time by defining the <code class="computeroutput">ASIO_CONCURRENCY_HINT_DEFAULT</code>
+          macro. For example, specifying
+        </p>
+<pre class="programlisting">-DASIO_CONCURRENCY_HINT_DEFAULT=1
+</pre>
+<p>
+          on the compiler command line means that a concurrency hint of <code class="computeroutput">1</code>
+          is used for all default-constructed <code class="computeroutput">io_context</code> objects in
+          the program. Similarly, the concurrency hint used by <code class="computeroutput">io_context</code>
+          objects constructed with <code class="computeroutput">1</code> can be overridden by defining
+          <code class="computeroutput">ASIO_CONCURRENCY_HINT_1</code>. For example, passing
+        </p>
+<pre class="programlisting">-DASIO_CONCURRENCY_HINT_1=ASIO_CONCURRENCY_HINT_UNSAFE
+</pre>
+<p>
+          to the compiler will disable thread safety for all of these objects.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="handler_tracking.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="coroutine.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/coroutine.html

@@ -0,0 +1,84 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Stackless Coroutines</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="concurrency_hint.html" title="Concurrency Hints">
+<link rel="next" href="spawn.html" title="Stackful Coroutines">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="concurrency_hint.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="spawn.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.coroutine"></a><a class="link" href="coroutine.html" title="Stackless Coroutines">Stackless Coroutines</a>
+</h4></div></div></div>
+<p>
+          The <a class="link" href="../../reference/coroutine.html" title="coroutine"><code class="computeroutput">coroutine</code></a>
+          class provides support for stackless coroutines. Stackless coroutines enable
+          programs to implement asynchronous logic in a synchronous manner, with
+          minimal overhead, as shown in the following example:
+        </p>
+<pre class="programlisting">struct session : asio::coroutine
+{
+  boost::shared_ptr&lt;tcp::socket&gt; socket_;
+  boost::shared_ptr&lt;std::vector&lt;char&gt; &gt; buffer_;
+
+  session(boost::shared_ptr&lt;tcp::socket&gt; socket)
+    : socket_(socket),
+      buffer_(new std::vector&lt;char&gt;(1024))
+  {
+  }
+
+  void operator()(asio::error_code ec = asio::error_code(), std::size_t n = 0)
+  {
+    if (!ec) reenter (this)
+    {
+      for (;;)
+      {
+        yield socket_-&gt;async_read_some(asio::buffer(*buffer_), *this);
+        yield asio::async_write(*socket_, asio::buffer(*buffer_, n), *this);
+      }
+    }
+  }
+};
+</pre>
+<p>
+          The <code class="computeroutput">coroutine</code> class is used in conjunction with the pseudo-keywords
+          <code class="computeroutput">reenter</code>, <code class="computeroutput">yield</code> and <code class="computeroutput">fork</code>. These are
+          preprocessor macros, and are implemented in terms of a <code class="computeroutput">switch</code>
+          statement using a technique similar to Duff's Device. The <a class="link" href="../../reference/coroutine.html" title="coroutine"><code class="computeroutput">coroutine</code></a>
+          class's documentation provides a complete description of these pseudo-keywords.
+        </p>
+<h6>
+<a name="asio.overview.core.coroutine.h0"></a>
+          <span><a name="asio.overview.core.coroutine.see_also"></a></span><a class="link" href="coroutine.html#asio.overview.core.coroutine.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/coroutine.html" title="coroutine">coroutine</a>, <a class="link" href="../../examples/cpp03_examples.html#asio.examples.cpp03_examples.http_server_4">HTTP
+          Server 4 example</a>, <a class="link" href="spawn.html" title="Stackful Coroutines">Stackful
+          Coroutines</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="concurrency_hint.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="spawn.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/coroutines_ts.html

@@ -0,0 +1,132 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Coroutines TS Support</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="spawn.html" title="Stackful Coroutines">
+<link rel="next" href="../networking.html" title="Networking">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="spawn.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="../networking.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.coroutines_ts"></a><a class="link" href="coroutines_ts.html" title="Coroutines TS Support">Coroutines TS Support</a>
+</h4></div></div></div>
+<p>
+          Support for the Coroutines TS is provided via the <a class="link" href="../../reference/awaitable.html" title="awaitable"><code class="computeroutput">awaitable</code></a>
+          class template, the <a class="link" href="../../reference/use_awaitable_t.html" title="use_awaitable_t"><code class="computeroutput">use_awaitable</code></a>
+          completion token, and the <a class="link" href="../../reference/co_spawn.html" title="co_spawn"><code class="computeroutput">co_spawn()</code></a>
+          function. These facilities allow programs to implement asynchronous logic
+          in a synchronous manner, in conjunction with the <code class="computeroutput">co_await</code>
+          keyword, as shown in the following example:
+        </p>
+<pre class="programlisting">asio::co_spawn(executor, echo(std::move(socket)), asio::detached);
+
+// ...
+
+asio::awaitable&lt;void&gt; echo(tcp::socket socket)
+{
+  try
+  {
+    char data[1024];
+    for (;;)
+    {
+      std::size_t n = co_await socket.async_read_some(asio::buffer(data), asio::use_awaitable);
+      co_await async_write(socket, asio::buffer(data, n), asio::use_awaitable);
+    }
+  }
+  catch (std::exception&amp; e)
+  {
+    std::printf("echo Exception: %s\n", e.what());
+  }
+}
+</pre>
+<p>
+          The first argument to <code class="computeroutput">co_spawn()</code> is an <a class="link" href="../../reference/Executor1.html" title="Executor requirements">executor</a>
+          that determines the context in which the coroutine is permitted to execute.
+          For example, a server's per-client object may consist of multiple coroutines;
+          they should all run on the same <code class="computeroutput">strand</code> so that no explicit
+          synchronisation is required.
+        </p>
+<p>
+          The second argument is an <a class="link" href="../../reference/awaitable.html" title="awaitable"><code class="computeroutput">awaitable&lt;R&gt;</code></a>,
+          that is the result of the coroutine's entry point function, and in the
+          above example is the result of the call to <code class="computeroutput">echo</code>. (Alternatively,
+          this argument can be a function object that returns the <a class="link" href="../../reference/awaitable.html" title="awaitable"><code class="computeroutput">awaitable&lt;R&gt;</code></a>.)
+          The template parameter <code class="computeroutput">R</code> is the type of return value produced
+          by the coroutine. In the above example, the coroutine returns <code class="computeroutput">void</code>.
+        </p>
+<p>
+          The third argument is a completion token, and this is used by <code class="computeroutput">co_spawn()</code>
+          to produce a completion handler with signature <code class="computeroutput">void(std::exception_ptr,
+          R)</code>. This completion handler is invoked with the result of the coroutine
+          once it has finished. In the above example we pass a completion token type,
+          <a class="link" href="../../reference/detached.html" title="detached"><code class="computeroutput">asio::detached</code></a>,
+          which is used to explicitly ignore the result of an asynchronous operation.
+        </p>
+<p>
+          In this example the body of the coroutine is implemented in the <code class="computeroutput">echo</code>
+          function. When the <code class="computeroutput">use_awaitable</code> completion token is passed
+          to an asynchronous operation, the operation's initiating function returns
+          an <code class="computeroutput">awaitable</code> that may be used with the <code class="computeroutput">co_await</code>
+          keyword:
+        </p>
+<pre class="programlisting">std::size_t n = co_await socket.async_read_some(asio::buffer(data), asio::use_awaitable);
+</pre>
+<p>
+          Where an asynchronous operation's handler signature has the form:
+        </p>
+<pre class="programlisting">void handler(asio::error_code ec, result_type result);
+</pre>
+<p>
+          the resulting type of the <code class="computeroutput">co_await</code> expression is <code class="computeroutput">result_type</code>.
+          In the <code class="computeroutput">async_read_some</code> example above, this is <code class="computeroutput">size_t</code>.
+          If the asynchronous operation fails, the <code class="computeroutput">error_code</code> is converted
+          into a <code class="computeroutput">system_error</code> exception and thrown.
+        </p>
+<p>
+          Where a handler signature has the form:
+        </p>
+<pre class="programlisting">void handler(asio::error_code ec);
+</pre>
+<p>
+          the <code class="computeroutput">co_await</code> expression produces a <code class="computeroutput">void</code> result.
+          As above, an error is passed back to the coroutine as a <code class="computeroutput">system_error</code>
+          exception.
+        </p>
+<h6>
+<a name="asio.overview.core.coroutines_ts.h0"></a>
+          <span><a name="asio.overview.core.coroutines_ts.see_also"></a></span><a class="link" href="coroutines_ts.html#asio.overview.core.coroutines_ts.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/co_spawn.html" title="co_spawn">co_spawn</a>, <a class="link" href="../../reference/detached.html" title="detached">detached</a>,
+          <a class="link" href="../../reference/redirect_error.html" title="redirect_error">redirect_error</a>, <a class="link" href="../../reference/awaitable.html" title="awaitable">awaitable</a>, <a class="link" href="../../reference/use_awaitable_t.html" title="use_awaitable_t">use_awaitable_t</a>,
+          <a class="link" href="../../reference/use_awaitable.html" title="use_awaitable">use_awaitable</a>, <a class="link" href="../../reference/this_coro__executor.html" title="this_coro::executor">this_coro::executor</a>,
+          <a class="link" href="../../examples/cpp17_examples.html#asio.examples.cpp17_examples.coroutines_ts_support">Coroutines
+          TS examples</a>, <a class="link" href="spawn.html" title="Stackful Coroutines">Stackful Coroutines</a>,
+          <a class="link" href="coroutine.html" title="Stackless Coroutines">Stackless Coroutines</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="spawn.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="../networking.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/handler_tracking.html

@@ -0,0 +1,490 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Handler Tracking</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="allocation.html" title="Custom Memory Allocation">
+<link rel="next" href="concurrency_hint.html" title="Concurrency Hints">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="allocation.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="concurrency_hint.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.handler_tracking"></a><a class="link" href="handler_tracking.html" title="Handler Tracking">Handler Tracking</a>
+</h4></div></div></div>
+<p>
+          To aid in debugging asynchronous programs, Asio provides support for handler
+          tracking. When enabled by defining <code class="computeroutput"><span class="identifier">ASIO_ENABLE_HANDLER_TRACKING</span></code>,
+          Asio writes debugging output to the standard error stream. The output records
+          asynchronous operations and the relationships between their handlers.
+        </p>
+<p>
+          This feature is useful when debugging and you need to know how your asynchronous
+          operations are chained together, or what the pending asynchronous operations
+          are. As an illustration, here is the output when you run the HTTP Server
+          example, handle a single request, then shut down via Ctrl+C:
+        </p>
+<pre class="programlisting">@asio|1589424178.741850|0*1|signal_set@0x7ffee977d878.async_wait
+@asio|1589424178.742593|0*2|socket@0x7ffee977d8a8.async_accept
+@asio|1589424178.742619|.2|non_blocking_accept,ec=asio.system:11
+@asio|1589424178.742625|0|resolver@0x7ffee977d760.cancel
+@asio|1589424195.830382|.2|non_blocking_accept,ec=system:0
+@asio|1589424195.830413|&gt;2|ec=system:0
+@asio|1589424195.830473|2*3|socket@0x7fa71d808230.async_receive
+@asio|1589424195.830496|.3|non_blocking_recv,ec=system:0,bytes_transferred=151
+@asio|1589424195.830503|2*4|socket@0x7ffee977d8a8.async_accept
+@asio|1589424195.830507|.4|non_blocking_accept,ec=asio.system:11
+@asio|1589424195.830510|&lt;2|
+@asio|1589424195.830529|&gt;3|ec=system:0,bytes_transferred=151
+@asio|1589424195.831143|3^5|in 'async_write' (./../../../include/asio/impl/write.hpp:330)
+@asio|1589424195.831143|3*5|socket@0x7fa71d808230.async_send
+@asio|1589424195.831186|.5|non_blocking_send,ec=system:0,bytes_transferred=1090
+@asio|1589424195.831194|&lt;3|
+@asio|1589424195.831218|&gt;5|ec=system:0,bytes_transferred=1090
+@asio|1589424195.831263|5|socket@0x7fa71d808230.close
+@asio|1589424195.831298|&lt;5|
+@asio|1589424199.793770|&gt;1|ec=system:0,signal_number=2
+@asio|1589424199.793781|1|socket@0x7ffee977d8a8.close
+@asio|1589424199.793809|&lt;1|
+@asio|1589424199.793840|&gt;4|ec=asio.system:125
+@asio|1589424199.793854|&lt;4|
+@asio|1589424199.793883|0|signal_set@0x7ffee977d878.cancel
+</pre>
+<p>
+          Each line is of the form:
+        </p>
+<pre class="programlisting">&lt;tag&gt;|&lt;timestamp&gt;|&lt;action&gt;|&lt;description&gt;
+</pre>
+<p>
+          The <code class="computeroutput">&lt;tag&gt;</code> is always <code class="computeroutput">@asio</code>, and is used
+          to identify and extract the handler tracking messages from the program
+          output.
+        </p>
+<p>
+          The <code class="computeroutput">&lt;timestamp&gt;</code> is seconds and microseconds from 1 Jan
+          1970 UTC.
+        </p>
+<p>
+          The <code class="computeroutput">&lt;action&gt;</code> takes one of the following forms:
+        </p>
+<div class="variablelist">
+<p class="title"><b></b></p>
+<dl>
+<dt><span class="term">&gt;n</span></dt>
+<dd><p>
+                The program entered the handler number <code class="computeroutput">n</code>. The <code class="computeroutput">&lt;description&gt;</code>
+                shows the arguments to the handler.
+              </p></dd>
+<dt><span class="term">&lt;n</span></dt>
+<dd><p>
+                The program left handler number <code class="computeroutput">n</code>.
+              </p></dd>
+<dt><span class="term">!n</span></dt>
+<dd><p>
+                The program left handler number n due to an exception.
+              </p></dd>
+<dt><span class="term">~n</span></dt>
+<dd><p>
+                The handler number <code class="computeroutput">n</code> was destroyed without having been
+                invoked. This is usually the case for any unfinished asynchronous
+                operations when the <code class="computeroutput">io_context</code> is destroyed.
+              </p></dd>
+<dt><span class="term">n^m</span></dt>
+<dd><p>
+                The handler number <code class="computeroutput">n</code> is about to create a new asynchronous
+                operation with completion handler number <code class="computeroutput">m</code>. The <code class="computeroutput">&lt;description&gt;</code>
+                contains source location information to help identify where in the
+                program the asynchronous operation is being started.
+              </p></dd>
+<dt><span class="term">n*m</span></dt>
+<dd><p>
+                The handler number <code class="computeroutput">n</code> created a new asynchronous operation
+                with completion handler number <code class="computeroutput">m</code>. The <code class="computeroutput">&lt;description&gt;</code>
+                shows what asynchronous operation was started.
+              </p></dd>
+<dt><span class="term">n</span></dt>
+<dd><p>
+                The handler number <code class="computeroutput">n</code> performed some other operation.
+                The <code class="computeroutput">&lt;description&gt;</code> shows what function was called.
+                Currently only <code class="computeroutput">close()</code> and <code class="computeroutput">cancel()</code> operations
+                are logged, as these may affect the state of pending asynchronous
+                operations.
+              </p></dd>
+<dt><span class="term">.n</span></dt>
+<dd><p>
+                The implementation performed a system call as part of the asynchronous
+                operation for which handler number <code class="computeroutput">n</code> is the completion
+                handler. The <code class="computeroutput">&lt;description&gt;</code> shows what function
+                was called and its results. These tracking events are only emitted
+                when using a reactor-based implementation.
+              </p></dd>
+</dl>
+</div>
+<p>
+          Where the <code class="computeroutput">&lt;description&gt;</code> shows a synchronous or asynchronous
+          operation, the format is <code class="computeroutput">&lt;object-type&gt;@&lt;pointer&gt;.&lt;operation&gt;</code>.
+          For handler entry, it shows a comma-separated list of arguments and their
+          values.
+        </p>
+<p>
+          As shown above, Each handler is assigned a numeric identifier. Where the
+          handler tracking output shows a handler number of 0, it means that the
+          action was performed outside of any handler.
+        </p>
+<h6>
+<a name="asio.overview.core.handler_tracking.h0"></a>
+          <span><a name="asio.overview.core.handler_tracking.adding_location_information"></a></span><a class="link" href="handler_tracking.html#asio.overview.core.handler_tracking.adding_location_information">Adding
+          Location Information</a>
+        </h6>
+<p>
+          Programs may augment the handler tracking output's location information
+          by using the macro <code class="computeroutput"><span class="identifier">ASIO_HANDLER_LOCATION</span></code>
+          in the source code. For example:
+        </p>
+<pre class="programlisting"><span class="preprocessor">#define</span> <span class="identifier">HANDLER_LOCATION</span> <span class="special">\</span>
+  <span class="identifier">ASIO_HANDLER_LOCATION</span><span class="special">((</span><span class="identifier">__FILE__</span><span class="special">,</span> <span class="identifier">__LINE__</span><span class="special">,</span> <span class="identifier">__func__</span><span class="special">))</span>
+
+<span class="comment">// ...</span>
+
+<span class="keyword">void</span> <span class="identifier">do_read</span><span class="special">()</span>
+<span class="special">{</span>
+  <span class="identifier">HANDLER_LOCATION</span><span class="special">;</span>
+
+  <span class="keyword">auto</span> <span class="identifier">self</span><span class="special">(</span><span class="identifier">shared_from_this</span><span class="special">());</span>
+  <span class="identifier">socket_</span><span class="special">.</span><span class="identifier">async_read_some</span><span class="special">(</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">(</span><span class="identifier">data_</span><span class="special">,</span> <span class="identifier">max_length</span><span class="special">),</span>
+      <span class="special">[</span><span class="keyword">this</span><span class="special">,</span> <span class="identifier">self</span><span class="special">](</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">error_code</span> <span class="identifier">ec</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">length</span><span class="special">)</span>
+      <span class="special">{</span>
+        <span class="identifier">HANDLER_LOCATION</span><span class="special">;</span>
+
+        <span class="keyword">if</span> <span class="special">(!</span><span class="identifier">ec</span><span class="special">)</span>
+        <span class="special">{</span>
+          <span class="identifier">do_write</span><span class="special">(</span><span class="identifier">length</span><span class="special">);</span>
+        <span class="special">}</span>
+      <span class="special">});</span>
+<span class="special">}</span>
+</pre>
+<p>
+          With the additional location information available, the handler tracking
+          output may include a call stack of source locations:
+        </p>
+<pre class="programlisting">@asio|1589423304.861944|&gt;7|ec=system:0,bytes_transferred=5
+@asio|1589423304.861952|7^8|in 'async_write' (./../../../include/asio/impl/write.hpp:330)
+@asio|1589423304.861952|7^8|called from 'do_write' (handler_tracking/async_tcp_echo_server.cpp:62)
+@asio|1589423304.861952|7^8|called from 'operator()' (handler_tracking/async_tcp_echo_server.cpp:51)
+@asio|1589423304.861952|7*8|socket@0x7ff61c008230.async_send
+@asio|1589423304.861975|.8|non_blocking_send,ec=system:0,bytes_transferred=5
+@asio|1589423304.861980|&lt;7|
+</pre>
+<p>
+          Furthermore, if <code class="computeroutput">std::source_location</code> or <code class="computeroutput">std::experimental::source_location</code>
+          are available, the <a class="link" href="../../reference/use_awaitable_t.html" title="use_awaitable_t"><code class="computeroutput">use_awaitable_t</code></a>
+          token (when default-constructed or used as a default completion token)
+          will also cause handler tracking to output a source location for each newly
+          created asynchronous operation. A <code class="computeroutput">use_awaitable_t</code> object may
+          also be explicitly constructed with location information.
+        </p>
+<h6>
+<a name="asio.overview.core.handler_tracking.h1"></a>
+          <span><a name="asio.overview.core.handler_tracking.visual_representations"></a></span><a class="link" href="handler_tracking.html#asio.overview.core.handler_tracking.visual_representations">Visual
+          Representations</a>
+        </h6>
+<p>
+          The handler tracking output may be post-processed using the included <code class="literal">handlerviz.pl</code>
+          tool to create a visual representation of the handlers (requires the GraphViz
+          tool <code class="literal">dot</code>).
+        </p>
+<h6>
+<a name="asio.overview.core.handler_tracking.h2"></a>
+          <span><a name="asio.overview.core.handler_tracking.custom_tracking"></a></span><a class="link" href="handler_tracking.html#asio.overview.core.handler_tracking.custom_tracking">Custom Tracking</a>
+        </h6>
+<p>
+          Handling tracking may be customised by defining the <code class="computeroutput"><span class="identifier">ASIO_CUSTOM_HANDLER_TRACKING</span></code>
+          macro to the name of a header file (enclosed in <code class="computeroutput"><span class="string">""</span></code>
+          or <code class="computeroutput"><span class="special">&lt;&gt;</span></code>). This header
+          file must implement the following preprocessor macros:
+        </p>
+<div class="informaltable"><table class="table">
+<colgroup>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                  <p>
+                    Macro
+                  </p>
+                </th>
+<th>
+                  <p>
+                    Description
+                  </p>
+                </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_INHERIT_TRACKED_HANDLER</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    Specifies a base class for classes that implement asynchronous
+                    operations. When used, the macro immediately follows the class
+                    name, so it must have the form <code class="computeroutput"><span class="special">:</span>
+                    <span class="keyword">public</span> <span class="identifier">my_class</span></code>.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_ALSO_INHERIT_TRACKED_HANDLER</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    Specifies a base class for classes that implement asynchronous
+                    operations. When used, the macro follows other base classes,
+                    so it must have the form <code class="computeroutput"><span class="special">,</span>
+                    <span class="keyword">public</span> <span class="identifier">my_class</span></code>.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_TRACKING_INIT</span><span class="special">(</span><span class="identifier">args</span><span class="special">)</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    An expression that is used to initialise the tracking mechanism.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_LOCATION</span><span class="special">(</span><span class="identifier">args</span><span class="special">)</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    A variable declaration that is used to define a source code location.
+                    <code class="computeroutput"><span class="identifier">args</span></code> is a parenthesised
+                    function argument list containing the file name, line number,
+                    and function name.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_CREATION</span><span class="special">(</span><span class="identifier">args</span><span class="special">)</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    An expression that is called on creation of an asynchronous operation.
+                    <code class="computeroutput"><span class="identifier">args</span></code> is a parenthesised
+                    function argument list containing the owning execution context,
+                    the tracked handler, the name of the object type, a pointer to
+                    the object, the object's native handle, and the operation name.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_COMPLETION</span><span class="special">(</span><span class="identifier">args</span><span class="special">)</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    An expression that is called on completion of an asynchronous
+                    operation. <code class="computeroutput"><span class="identifier">args</span></code>
+                    is a parenthesised function argument list containing the tracked
+                    handler.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_INVOCATION_BEGIN</span><span class="special">(</span><span class="identifier">args</span><span class="special">)</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    An expression that is called immediately before a completion
+                    handler is invoked. <code class="computeroutput"><span class="identifier">args</span></code>
+                    is a parenthesised function argument list containing the arguments
+                    to the completion handler.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_INVOCATION_END</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    An expression that is called immediately after a completion handler
+                    is invoked.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_OPERATION</span><span class="special">(</span><span class="identifier">args</span><span class="special">)</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    An expression that is called when some synchronous object operation
+                    is called (such as <code class="computeroutput"><span class="identifier">close</span><span class="special">()</span></code> or <code class="computeroutput"><span class="identifier">cancel</span><span class="special">()</span></code>). <code class="computeroutput"><span class="identifier">args</span></code>
+                    is a parenthesised function argument list containing the owning
+                    execution context, the name of the object type, a pointer to
+                    the object, the object's native handle, and the operation name.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_REACTOR_REGISTRATION</span><span class="special">(</span><span class="identifier">args</span><span class="special">)</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    An expression that is called when an object is registered with
+                    the reactor. <code class="computeroutput"><span class="identifier">args</span></code>
+                    is a parenthesised function argument list containing the owning
+                    execution context, the object's native handle, and a unique registration
+                    key.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_REACTOR_DEREGISTRATION</span><span class="special">(</span><span class="identifier">args</span><span class="special">)</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    An expression that is called when an object is deregistered from
+                    the reactor. <code class="computeroutput"><span class="identifier">args</span></code>
+                    is a parenthesised function argument list containing the owning
+                    execution context, the object's native handle, and a unique registration
+                    key.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_REACTOR_READ_EVENT</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    A bitmask constant used to identify reactor read readiness events.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_REACTOR_WRITE_EVENT</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    A bitmask constant used to identify reactor write readiness events.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_REACTOR_ERROR_EVENT</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    A bitmask constant used to identify reactor error readiness events.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_REACTOR_EVENTS</span><span class="special">(</span><span class="identifier">args</span><span class="special">)</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    An expression that is called when an object registered with the
+                    reactor becomes ready. <code class="computeroutput"><span class="identifier">args</span></code>
+                    is a parenthesised function argument list containing the owning
+                    execution context, the unique registration key, and a bitmask
+                    of the ready events.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput"><span class="identifier">ASIO_HANDLER_REACTOR_OPERATION</span><span class="special">(</span><span class="identifier">args</span><span class="special">)</span></code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    An expression that is called when the implementation performs
+                    a system call as part of a reactor-based asynchronous operation.
+                    <code class="computeroutput"><span class="identifier">args</span></code> is a parenthesised
+                    function argument list containing the tracked handler, the operation
+                    name, the error code produced by the operation, and (optionally)
+                    the number of bytes transferred.
+                  </p>
+                </td>
+</tr>
+</tbody>
+</table></div>
+<h6>
+<a name="asio.overview.core.handler_tracking.h3"></a>
+          <span><a name="asio.overview.core.handler_tracking.see_also"></a></span><a class="link" href="handler_tracking.html#asio.overview.core.handler_tracking.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../examples/cpp11_examples.html#asio.examples.cpp11_examples.handler_tracking">Handler tracking
+          examples</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="allocation.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="concurrency_hint.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/line_based.html

@@ -0,0 +1,158 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Line-Based Operations</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="reactor.html" title="Reactor-Style Operations">
+<link rel="next" href="allocation.html" title="Custom Memory Allocation">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="reactor.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="allocation.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.line_based"></a><a class="link" href="line_based.html" title="Line-Based Operations">Line-Based Operations</a>
+</h4></div></div></div>
+<p>
+          Many commonly-used internet protocols are line-based, which means that
+          they have protocol elements that are delimited by the character sequence
+          <code class="computeroutput"><span class="string">"\r\n"</span></code>. Examples
+          include HTTP, SMTP and FTP. To more easily permit the implementation of
+          line-based protocols, as well as other protocols that use delimiters, Asio
+          includes the functions <code class="computeroutput"><span class="identifier">read_until</span><span class="special">()</span></code> and <code class="computeroutput"><span class="identifier">async_read_until</span><span class="special">()</span></code>.
+        </p>
+<p>
+          The following example illustrates the use of <code class="computeroutput"><span class="identifier">async_read_until</span><span class="special">()</span></code> in an HTTP server, to receive the first
+          line of an HTTP request from a client:
+        </p>
+<pre class="programlisting"><span class="keyword">class</span> <span class="identifier">http_connection</span>
+<span class="special">{</span>
+  <span class="special">...</span>
+
+  <span class="keyword">void</span> <span class="identifier">start</span><span class="special">()</span>
+  <span class="special">{</span>
+    <span class="identifier">asio</span><span class="special">::</span><span class="identifier">async_read_until</span><span class="special">(</span><span class="identifier">socket_</span><span class="special">,</span> <span class="identifier">data_</span><span class="special">,</span> <span class="string">"\r\n"</span><span class="special">,</span>
+        <span class="identifier">boost</span><span class="special">::</span><span class="identifier">bind</span><span class="special">(&amp;</span><span class="identifier">http_connection</span><span class="special">::</span><span class="identifier">handle_request_line</span><span class="special">,</span> <span class="keyword">this</span><span class="special">,</span> <span class="identifier">_1</span><span class="special">));</span>
+  <span class="special">}</span>
+
+  <span class="keyword">void</span> <span class="identifier">handle_request_line</span><span class="special">(</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="identifier">ec</span><span class="special">)</span>
+  <span class="special">{</span>
+    <span class="keyword">if</span> <span class="special">(!</span><span class="identifier">ec</span><span class="special">)</span>
+    <span class="special">{</span>
+      <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">method</span><span class="special">,</span> <span class="identifier">uri</span><span class="special">,</span> <span class="identifier">version</span><span class="special">;</span>
+      <span class="keyword">char</span> <span class="identifier">sp1</span><span class="special">,</span> <span class="identifier">sp2</span><span class="special">,</span> <span class="identifier">cr</span><span class="special">,</span> <span class="identifier">lf</span><span class="special">;</span>
+      <span class="identifier">std</span><span class="special">::</span><span class="identifier">istream</span> <span class="identifier">is</span><span class="special">(&amp;</span><span class="identifier">data_</span><span class="special">);</span>
+      <span class="identifier">is</span><span class="special">.</span><span class="identifier">unsetf</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ios_base</span><span class="special">::</span><span class="identifier">skipws</span><span class="special">);</span>
+      <span class="identifier">is</span> <span class="special">&gt;&gt;</span> <span class="identifier">method</span> <span class="special">&gt;&gt;</span> <span class="identifier">sp1</span> <span class="special">&gt;&gt;</span> <span class="identifier">uri</span> <span class="special">&gt;&gt;</span> <span class="identifier">sp2</span> <span class="special">&gt;&gt;</span> <span class="identifier">version</span> <span class="special">&gt;&gt;</span> <span class="identifier">cr</span> <span class="special">&gt;&gt;</span> <span class="identifier">lf</span><span class="special">;</span>
+      <span class="special">...</span>
+    <span class="special">}</span>
+  <span class="special">}</span>
+
+  <span class="special">...</span>
+
+  <span class="identifier">asio</span><span class="special">::</span><span class="identifier">ip</span><span class="special">::</span><span class="identifier">tcp</span><span class="special">::</span><span class="identifier">socket</span> <span class="identifier">socket_</span><span class="special">;</span>
+  <span class="identifier">asio</span><span class="special">::</span><span class="identifier">streambuf</span> <span class="identifier">data_</span><span class="special">;</span>
+<span class="special">};</span>
+</pre>
+<p>
+          The <code class="computeroutput"><span class="identifier">streambuf</span></code> data member
+          serves as a place to store the data that has been read from the socket
+          before it is searched for the delimiter. It is important to remember that
+          there may be additional data <span class="emphasis"><em>after</em></span> the delimiter.
+          This surplus data should be left in the <code class="computeroutput"><span class="identifier">streambuf</span></code>
+          so that it may be inspected by a subsequent call to <code class="computeroutput"><span class="identifier">read_until</span><span class="special">()</span></code> or <code class="computeroutput"><span class="identifier">async_read_until</span><span class="special">()</span></code>.
+        </p>
+<p>
+          The delimiters may be specified as a single <code class="computeroutput"><span class="keyword">char</span></code>,
+          a <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span></code> or a <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span></code>.
+          The <code class="computeroutput"><span class="identifier">read_until</span><span class="special">()</span></code>
+          and <code class="computeroutput"><span class="identifier">async_read_until</span><span class="special">()</span></code>
+          functions also include overloads that accept a user-defined function object
+          called a match condition. For example, to read data into a streambuf until
+          whitespace is encountered:
+        </p>
+<pre class="programlisting"><span class="keyword">typedef</span> <span class="identifier">asio</span><span class="special">::</span><span class="identifier">buffers_iterator</span><span class="special">&lt;</span>
+    <span class="identifier">asio</span><span class="special">::</span><span class="identifier">streambuf</span><span class="special">::</span><span class="identifier">const_buffers_type</span><span class="special">&gt;</span> <span class="identifier">iterator</span><span class="special">;</span>
+
+<span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special">&lt;</span><span class="identifier">iterator</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span>
+<span class="identifier">match_whitespace</span><span class="special">(</span><span class="identifier">iterator</span> <span class="identifier">begin</span><span class="special">,</span> <span class="identifier">iterator</span> <span class="identifier">end</span><span class="special">)</span>
+<span class="special">{</span>
+  <span class="identifier">iterator</span> <span class="identifier">i</span> <span class="special">=</span> <span class="identifier">begin</span><span class="special">;</span>
+  <span class="keyword">while</span> <span class="special">(</span><span class="identifier">i</span> <span class="special">!=</span> <span class="identifier">end</span><span class="special">)</span>
+    <span class="keyword">if</span> <span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">isspace</span><span class="special">(*</span><span class="identifier">i</span><span class="special">++))</span>
+      <span class="keyword">return</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">make_pair</span><span class="special">(</span><span class="identifier">i</span><span class="special">,</span> <span class="keyword">true</span><span class="special">);</span>
+  <span class="keyword">return</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">make_pair</span><span class="special">(</span><span class="identifier">i</span><span class="special">,</span> <span class="keyword">false</span><span class="special">);</span>
+<span class="special">}</span>
+<span class="special">...</span>
+<span class="identifier">asio</span><span class="special">::</span><span class="identifier">streambuf</span> <span class="identifier">b</span><span class="special">;</span>
+<span class="identifier">asio</span><span class="special">::</span><span class="identifier">read_until</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span> <span class="identifier">b</span><span class="special">,</span> <span class="identifier">match_whitespace</span><span class="special">);</span>
+</pre>
+<p>
+          To read data into a streambuf until a matching character is found:
+        </p>
+<pre class="programlisting"><span class="keyword">class</span> <span class="identifier">match_char</span>
+<span class="special">{</span>
+<span class="keyword">public</span><span class="special">:</span>
+  <span class="keyword">explicit</span> <span class="identifier">match_char</span><span class="special">(</span><span class="keyword">char</span> <span class="identifier">c</span><span class="special">)</span> <span class="special">:</span> <span class="identifier">c_</span><span class="special">(</span><span class="identifier">c</span><span class="special">)</span> <span class="special">{}</span>
+
+  <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Iterator</span><span class="special">&gt;</span>
+  <span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special">&lt;</span><span class="identifier">Iterator</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span> <span class="keyword">operator</span><span class="special">()(</span>
+      <span class="identifier">Iterator</span> <span class="identifier">begin</span><span class="special">,</span> <span class="identifier">Iterator</span> <span class="identifier">end</span><span class="special">)</span> <span class="keyword">const</span>
+  <span class="special">{</span>
+    <span class="identifier">Iterator</span> <span class="identifier">i</span> <span class="special">=</span> <span class="identifier">begin</span><span class="special">;</span>
+    <span class="keyword">while</span> <span class="special">(</span><span class="identifier">i</span> <span class="special">!=</span> <span class="identifier">end</span><span class="special">)</span>
+      <span class="keyword">if</span> <span class="special">(</span><span class="identifier">c_</span> <span class="special">==</span> <span class="special">*</span><span class="identifier">i</span><span class="special">++)</span>
+        <span class="keyword">return</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">make_pair</span><span class="special">(</span><span class="identifier">i</span><span class="special">,</span> <span class="keyword">true</span><span class="special">);</span>
+    <span class="keyword">return</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">make_pair</span><span class="special">(</span><span class="identifier">i</span><span class="special">,</span> <span class="keyword">false</span><span class="special">);</span>
+  <span class="special">}</span>
+
+<span class="keyword">private</span><span class="special">:</span>
+  <span class="keyword">char</span> <span class="identifier">c_</span><span class="special">;</span>
+<span class="special">};</span>
+
+<span class="keyword">namespace</span> <span class="identifier">asio</span> <span class="special">{</span>
+  <span class="keyword">template</span> <span class="special">&lt;&gt;</span> <span class="keyword">struct</span> <span class="identifier">is_match_condition</span><span class="special">&lt;</span><span class="identifier">match_char</span><span class="special">&gt;</span>
+    <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">true_type</span> <span class="special">{};</span>
+<span class="special">}</span> <span class="comment">// namespace asio</span>
+<span class="special">...</span>
+<span class="identifier">asio</span><span class="special">::</span><span class="identifier">streambuf</span> <span class="identifier">b</span><span class="special">;</span>
+<span class="identifier">asio</span><span class="special">::</span><span class="identifier">read_until</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span> <span class="identifier">b</span><span class="special">,</span> <span class="identifier">match_char</span><span class="special">(</span><span class="char">'a'</span><span class="special">));</span>
+</pre>
+<p>
+          The <code class="computeroutput"><span class="identifier">is_match_condition</span><span class="special">&lt;&gt;</span></code> type trait automatically evaluates
+          to true for functions, and for function objects with a nested <code class="computeroutput"><span class="identifier">result_type</span></code> typedef. For other types
+          the trait must be explicitly specialised, as shown above.
+        </p>
+<h6>
+<a name="asio.overview.core.line_based.h0"></a>
+          <span><a name="asio.overview.core.line_based.see_also"></a></span><a class="link" href="line_based.html#asio.overview.core.line_based.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/async_read_until.html" title="async_read_until">async_read_until()</a>,
+          <a class="link" href="../../reference/is_match_condition.html" title="is_match_condition">is_match_condition</a>,
+          <a class="link" href="../../reference/read_until.html" title="read_until">read_until()</a>, <a class="link" href="../../reference/streambuf.html" title="streambuf">streambuf</a>,
+          <a class="link" href="../../examples/cpp03_examples.html#asio.examples.cpp03_examples.http_client">HTTP client example</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="reactor.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="allocation.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/reactor.html

@@ -0,0 +1,79 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Reactor-Style Operations</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="streams.html" title="Streams, Short Reads and Short Writes">
+<link rel="next" href="line_based.html" title="Line-Based Operations">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="streams.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="line_based.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.reactor"></a><a class="link" href="reactor.html" title="Reactor-Style Operations">Reactor-Style Operations</a>
+</h4></div></div></div>
+<p>
+          Sometimes a program must be integrated with a third-party library that
+          wants to perform the I/O operations itself. To facilitate this, Asio includes
+          synchronous and asynchronous operations that may be used to wait for a
+          socket to become ready to read, ready to write, or to have a pending error
+          condition.
+        </p>
+<p>
+          As an example, to perform a non-blocking read something like the following
+          may be used:
+        </p>
+<pre class="programlisting"><span class="identifier">ip</span><span class="special">::</span><span class="identifier">tcp</span><span class="special">::</span><span class="identifier">socket</span> <span class="identifier">socket</span><span class="special">(</span><span class="identifier">my_io_context</span><span class="special">);</span>
+<span class="special">...</span>
+<span class="identifier">socket</span><span class="special">.</span><span class="identifier">non_blocking</span><span class="special">(</span><span class="keyword">true</span><span class="special">);</span>
+<span class="special">...</span>
+<span class="identifier">socket</span><span class="special">.</span><span class="identifier">async_wait</span><span class="special">(</span><span class="identifier">ip</span><span class="special">::</span><span class="identifier">tcp</span><span class="special">::</span><span class="identifier">socket</span><span class="special">::</span><span class="identifier">wait_read</span><span class="special">,</span> <span class="identifier">read_handler</span><span class="special">);</span>
+<span class="special">...</span>
+<span class="keyword">void</span> <span class="identifier">read_handler</span><span class="special">(</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="identifier">ec</span><span class="special">)</span>
+<span class="special">{</span>
+  <span class="keyword">if</span> <span class="special">(!</span><span class="identifier">ec</span><span class="special">)</span>
+  <span class="special">{</span>
+    <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="keyword">char</span><span class="special">&gt;</span> <span class="identifier">buf</span><span class="special">(</span><span class="identifier">socket</span><span class="special">.</span><span class="identifier">available</span><span class="special">());</span>
+    <span class="identifier">socket</span><span class="special">.</span><span class="identifier">read_some</span><span class="special">(</span><span class="identifier">buffer</span><span class="special">(</span><span class="identifier">buf</span><span class="special">));</span>
+  <span class="special">}</span>
+<span class="special">}</span>
+</pre>
+<p>
+          These operations are supported for sockets on all platforms, and for the
+          POSIX stream-oriented descriptor classes.
+        </p>
+<h6>
+<a name="asio.overview.core.reactor.h0"></a>
+          <span><a name="asio.overview.core.reactor.see_also"></a></span><a class="link" href="reactor.html#asio.overview.core.reactor.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/basic_socket/wait.html" title="basic_socket::wait">basic_socket::wait()</a>,
+          <a class="link" href="../../reference/basic_socket/async_wait.html" title="basic_socket::async_wait">basic_socket::async_wait()</a>,
+          <a class="link" href="../../reference/basic_socket/non_blocking.html" title="basic_socket::non_blocking">basic_socket::non_blocking()</a>,
+          <a class="link" href="../../reference/basic_socket/native_non_blocking.html" title="basic_socket::native_non_blocking">basic_socket::native_non_blocking()</a>,
+          <a class="link" href="../../examples/cpp03_examples.html#asio.examples.cpp03_examples.nonblocking">nonblocking example</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="streams.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="line_based.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/spawn.html

@@ -0,0 +1,146 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Stackful Coroutines</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="coroutine.html" title="Stackless Coroutines">
+<link rel="next" href="coroutines_ts.html" title="Coroutines TS Support">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="coroutine.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="coroutines_ts.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.spawn"></a><a class="link" href="spawn.html" title="Stackful Coroutines">Stackful Coroutines</a>
+</h4></div></div></div>
+<p>
+          The <a class="link" href="../../reference/spawn.html" title="spawn"><code class="computeroutput">spawn()</code></a> function
+          is a high-level wrapper for running stackful coroutines. It is based on
+          the Boost.Coroutine library. The <code class="computeroutput">spawn()</code> function enables
+          programs to implement asynchronous logic in a synchronous manner, as shown
+          in the following example:
+        </p>
+<pre class="programlisting">asio::spawn(my_strand, do_echo);
+
+// ...
+
+void do_echo(asio::yield_context yield)
+{
+  try
+  {
+    char data[128];
+    for (;;)
+    {
+      std::size_t length =
+        my_socket.async_read_some(
+          asio::buffer(data), yield);
+
+      asio::async_write(my_socket,
+          asio::buffer(data, length), yield);
+    }
+  }
+  catch (std::exception&amp; e)
+  {
+    // ...
+  }
+}
+</pre>
+<p>
+          The first argument to <code class="computeroutput">spawn()</code> may be a <a class="link" href="../../reference/io_context__strand.html" title="io_context::strand"><code class="computeroutput">strand</code></a>,
+          <a class="link" href="../../reference/io_context.html" title="io_context"><code class="computeroutput">io_context</code></a>,
+          or <a class="link" href="../../reference/CompletionHandler.html" title="Completion handler requirements">completion handler</a>.
+          This argument determines the context in which the coroutine is permitted
+          to execute. For example, a server's per-client object may consist of multiple
+          coroutines; they should all run on the same <code class="computeroutput">strand</code> so that
+          no explicit synchronisation is required.
+        </p>
+<p>
+          The second argument is a function object with signature:
+        </p>
+<pre class="programlisting">void coroutine(asio::yield_context yield);
+</pre>
+<p>
+          that specifies the code to be run as part of the coroutine. The parameter
+          <code class="computeroutput">yield</code> may be passed to an asynchronous operation in place
+          of the completion handler, as in:
+        </p>
+<pre class="programlisting">std::size_t length =
+  my_socket.async_read_some(
+    asio::buffer(data), yield);
+</pre>
+<p>
+          This starts the asynchronous operation and suspends the coroutine. The
+          coroutine will be resumed automatically when the asynchronous operation
+          completes.
+        </p>
+<p>
+          Where an asynchronous operation's handler signature has the form:
+        </p>
+<pre class="programlisting">void handler(asio::error_code ec, result_type result);
+</pre>
+<p>
+          the initiating function returns the result_type. In the <code class="computeroutput">async_read_some</code>
+          example above, this is <code class="computeroutput">size_t</code>. If the asynchronous operation
+          fails, the <code class="computeroutput">error_code</code> is converted into a <code class="computeroutput">system_error</code>
+          exception and thrown.
+        </p>
+<p>
+          Where a handler signature has the form:
+        </p>
+<pre class="programlisting">void handler(asio::error_code ec);
+</pre>
+<p>
+          the initiating function returns <code class="computeroutput">void</code>. As above, an error is
+          passed back to the coroutine as a <code class="computeroutput">system_error</code> exception.
+        </p>
+<p>
+          To collect the <code class="computeroutput">error_code</code> from an operation, rather than have
+          it throw an exception, associate the output variable with the <code class="computeroutput">yield_context</code>
+          as follows:
+        </p>
+<pre class="programlisting">asio::error_code ec;
+std::size_t length =
+  my_socket.async_read_some(
+    asio::buffer(data), yield[ec]);
+</pre>
+<p>
+          <span class="bold"><strong>Note:</strong></span> if <code class="computeroutput">spawn()</code> is used
+          with a custom completion handler of type <code class="computeroutput">Handler</code>, the function
+          object signature is actually:
+        </p>
+<pre class="programlisting">void coroutine(asio::basic_yield_context&lt;Handler&gt; yield);
+</pre>
+<h6>
+<a name="asio.overview.core.spawn.h0"></a>
+          <span><a name="asio.overview.core.spawn.see_also"></a></span><a class="link" href="spawn.html#asio.overview.core.spawn.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/spawn.html" title="spawn">spawn</a>, <a class="link" href="../../reference/yield_context.html" title="yield_context">yield_context</a>,
+          <a class="link" href="../../reference/basic_yield_context.html" title="basic_yield_context">basic_yield_context</a>,
+          <a class="link" href="../../examples/cpp03_examples.html#asio.examples.cpp03_examples.spawn">Spawn example (C++03)</a>,
+          <a class="link" href="../../examples/cpp11_examples.html#asio.examples.cpp11_examples.spawn">Spawn example (C++11)</a>,
+          <a class="link" href="coroutine.html" title="Stackless Coroutines">Stackless Coroutines</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="coroutine.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="coroutines_ts.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/strands.html

@@ -0,0 +1,161 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Strands: Use Threads Without Explicit Locking</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="threads.html" title="Threads and Asio">
+<link rel="next" href="buffers.html" title="Buffers">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="threads.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="buffers.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.strands"></a><a class="link" href="strands.html" title="Strands: Use Threads Without Explicit Locking">Strands: Use Threads Without
+        Explicit Locking</a>
+</h4></div></div></div>
+<p>
+          A strand is defined as a strictly sequential invocation of event handlers
+          (i.e. no concurrent invocation). Use of strands allows execution of code
+          in a multithreaded program without the need for explicit locking (e.g.
+          using mutexes).
+        </p>
+<p>
+          Strands may be either implicit or explicit, as illustrated by the following
+          alternative approaches:
+        </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+              Calling io_context::run() from only one thread means all event handlers
+              execute in an implicit strand, due to the io_context's guarantee that
+              handlers are only invoked from inside run().
+            </li>
+<li class="listitem">
+              Where there is a single chain of asynchronous operations associated
+              with a connection (e.g. in a half duplex protocol implementation like
+              HTTP) there is no possibility of concurrent execution of the handlers.
+              This is an implicit strand.
+            </li>
+<li class="listitem">
+              An explicit strand is an instance of <code class="computeroutput"><span class="identifier">strand</span><span class="special">&lt;&gt;</span></code> or <code class="computeroutput"><span class="identifier">io_context</span><span class="special">::</span><span class="identifier">strand</span></code>.
+              All event handler function objects need to be bound to the strand using
+              <code class="computeroutput"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">bind_executor</span><span class="special">()</span></code>
+              or otherwise posted/dispatched through the strand object.
+            </li>
+</ul></div>
+<p>
+          In the case of composed asynchronous operations, such as <code class="computeroutput"><span class="identifier">async_read</span><span class="special">()</span></code>
+          or <code class="computeroutput"><span class="identifier">async_read_until</span><span class="special">()</span></code>,
+          if a completion handler goes through a strand, then all intermediate handlers
+          should also go through the same strand. This is needed to ensure thread
+          safe access for any objects that are shared between the caller and the
+          composed operation (in the case of <code class="computeroutput"><span class="identifier">async_read</span><span class="special">()</span></code> it's the socket, which the caller can
+          <code class="computeroutput"><span class="identifier">close</span><span class="special">()</span></code>
+          to cancel the operation).
+        </p>
+<p>
+          To achieve this, all asynchronous operations obtain the handler's associated
+          executor by using the <code class="computeroutput"><span class="identifier">get_associated_executor</span></code>
+          function. For example:
+        </p>
+<pre class="programlisting"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">associated_executor_t</span><span class="special">&lt;</span><span class="identifier">Handler</span><span class="special">&gt;</span> <span class="identifier">a</span> <span class="special">=</span> <span class="identifier">asio</span><span class="special">::</span><span class="identifier">get_associated_executor</span><span class="special">(</span><span class="identifier">h</span><span class="special">);</span>
+</pre>
+<p>
+          The associated executor must satisfy the Executor requirements. It will
+          be used by the asynchronous operation to submit both intermediate and final
+          handlers for execution.
+        </p>
+<p>
+          The executor may be customised for a particular handler type by specifying
+          a nested type <code class="computeroutput"><span class="identifier">executor_type</span></code>
+          and member function <code class="computeroutput"><span class="identifier">get_executor</span><span class="special">()</span></code>:
+        </p>
+<pre class="programlisting"><span class="keyword">class</span> <span class="identifier">my_handler</span>
+<span class="special">{</span>
+<span class="keyword">public</span><span class="special">:</span>
+  <span class="comment">// Custom implementation of Executor type requirements.</span>
+  <span class="keyword">typedef</span> <span class="identifier">my_executor</span> <span class="identifier">executor_type</span><span class="special">;</span>
+
+  <span class="comment">// Return a custom executor implementation.</span>
+  <span class="identifier">executor_type</span> <span class="identifier">get_executor</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span>
+  <span class="special">{</span>
+    <span class="keyword">return</span> <span class="identifier">my_executor</span><span class="special">();</span>
+  <span class="special">}</span>
+
+  <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()()</span> <span class="special">{</span> <span class="special">...</span> <span class="special">}</span>
+<span class="special">};</span>
+</pre>
+<p>
+          In more complex cases, the <code class="computeroutput"><span class="identifier">associated_executor</span></code>
+          template may be partially specialised directly:
+        </p>
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">my_handler</span>
+<span class="special">{</span>
+  <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()()</span> <span class="special">{</span> <span class="special">...</span> <span class="special">}</span>
+<span class="special">};</span>
+
+<span class="keyword">namespace</span> <span class="identifier">asio</span> <span class="special">{</span>
+
+  <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Executor</span><span class="special">&gt;</span>
+  <span class="keyword">struct</span> <span class="identifier">associated_executor</span><span class="special">&lt;</span><span class="identifier">my_handler</span><span class="special">,</span> <span class="identifier">Executor</span><span class="special">&gt;</span>
+  <span class="special">{</span>
+    <span class="comment">// Custom implementation of Executor type requirements.</span>
+    <span class="keyword">typedef</span> <span class="identifier">my_executor</span> <span class="identifier">type</span><span class="special">;</span>
+
+    <span class="comment">// Return a custom executor implementation.</span>
+    <span class="keyword">static</span> <span class="identifier">type</span> <span class="identifier">get</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">my_handler</span><span class="special">&amp;,</span>
+        <span class="keyword">const</span> <span class="identifier">Executor</span><span class="special">&amp;</span> <span class="special">=</span> <span class="identifier">Executor</span><span class="special">())</span> <span class="keyword">noexcept</span>
+    <span class="special">{</span>
+      <span class="keyword">return</span> <span class="identifier">my_executor</span><span class="special">();</span>
+    <span class="special">}</span>
+  <span class="special">};</span>
+
+<span class="special">}</span> <span class="comment">// namespace asio</span>
+</pre>
+<p>
+          The <code class="computeroutput"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">bind_executor</span><span class="special">()</span></code>
+          function is a helper to bind a specific executor object, such as a strand,
+          to a completion handler. This binding automatically associates an executor
+          as shown above. For example, to bind a strand to a completion handler we
+          would simply write:
+        </p>
+<pre class="programlisting"><span class="identifier">my_socket</span><span class="special">.</span><span class="identifier">async_read_some</span><span class="special">(</span><span class="identifier">my_buffer</span><span class="special">,</span>
+    <span class="identifier">asio</span><span class="special">::</span><span class="identifier">bind_executor</span><span class="special">(</span><span class="identifier">my_strand</span><span class="special">,</span>
+      <span class="special">[](</span><span class="identifier">error_code</span> <span class="identifier">ec</span><span class="special">,</span> <span class="identifier">size_t</span> <span class="identifier">length</span><span class="special">)</span>
+      <span class="special">{</span>
+        <span class="comment">// ...</span>
+      <span class="special">}));</span>
+</pre>
+<h6>
+<a name="asio.overview.core.strands.h0"></a>
+          <span><a name="asio.overview.core.strands.see_also"></a></span><a class="link" href="strands.html#asio.overview.core.strands.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/associated_executor.html" title="associated_executor">associated_executor</a>,
+          <a class="link" href="../../reference/get_associated_executor.html" title="get_associated_executor">get_associated_executor</a>,
+          <a class="link" href="../../reference/bind_executor.html" title="bind_executor">bind_executor</a>, <a class="link" href="../../reference/strand.html" title="strand">strand</a>, <a class="link" href="../../reference/io_context__strand.html" title="io_context::strand">io_context::strand</a>,
+          <a class="link" href="../../tutorial/tuttimer5.html" title="Timer.5 - Synchronising handlers in multithreaded programs">tutorial Timer.5</a>, <a class="link" href="../../examples/cpp03_examples.html#asio.examples.cpp03_examples.http_server_3">HTTP server 3 example</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="threads.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="buffers.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/streams.html

@@ -0,0 +1,121 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Streams, Short Reads and Short Writes</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="buffers.html" title="Buffers">
+<link rel="next" href="reactor.html" title="Reactor-Style Operations">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="buffers.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="reactor.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.streams"></a><a class="link" href="streams.html" title="Streams, Short Reads and Short Writes">Streams, Short Reads and
+        Short Writes</a>
+</h4></div></div></div>
+<p>
+          Many I/O objects in Asio are stream-oriented. This means that:
+        </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+              There are no message boundaries. The data being transferred is a continuous
+              sequence of bytes.
+            </li>
+<li class="listitem">
+              Read or write operations may transfer fewer bytes than requested. This
+              is referred to as a short read or short write.
+            </li>
+</ul></div>
+<p>
+          Objects that provide stream-oriented I/O model one or more of the following
+          type requirements:
+        </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+              <code class="computeroutput"><span class="identifier">SyncReadStream</span></code>, where
+              synchronous read operations are performed using a member function called
+              <code class="computeroutput"><span class="identifier">read_some</span><span class="special">()</span></code>.
+            </li>
+<li class="listitem">
+              <code class="computeroutput"><span class="identifier">AsyncReadStream</span></code>, where
+              asynchronous read operations are performed using a member function
+              called <code class="computeroutput"><span class="identifier">async_read_some</span><span class="special">()</span></code>.
+            </li>
+<li class="listitem">
+              <code class="computeroutput"><span class="identifier">SyncWriteStream</span></code>, where
+              synchronous write operations are performed using a member function
+              called <code class="computeroutput"><span class="identifier">write_some</span><span class="special">()</span></code>.
+            </li>
+<li class="listitem">
+              <code class="computeroutput"><span class="identifier">AsyncWriteStream</span></code>, where
+              asynchronous write operations are performed using a member function
+              called <code class="computeroutput"><span class="identifier">async_write_some</span><span class="special">()</span></code>.
+            </li>
+</ul></div>
+<p>
+          Examples of stream-oriented I/O objects include <code class="computeroutput"><span class="identifier">ip</span><span class="special">::</span><span class="identifier">tcp</span><span class="special">::</span><span class="identifier">socket</span></code>,
+          <code class="computeroutput"><span class="identifier">ssl</span><span class="special">::</span><span class="identifier">stream</span><span class="special">&lt;&gt;</span></code>,
+          <code class="computeroutput"><span class="identifier">posix</span><span class="special">::</span><span class="identifier">stream_descriptor</span></code>, <code class="computeroutput"><span class="identifier">windows</span><span class="special">::</span><span class="identifier">stream_handle</span></code>,
+          etc.
+        </p>
+<p>
+          Programs typically want to transfer an exact number of bytes. When a short
+          read or short write occurs the program must restart the operation, and
+          continue to do so until the required number of bytes has been transferred.
+          Asio provides generic functions that do this automatically: <code class="computeroutput"><span class="identifier">read</span><span class="special">()</span></code>,
+          <code class="computeroutput"><span class="identifier">async_read</span><span class="special">()</span></code>,
+          <code class="computeroutput"><span class="identifier">write</span><span class="special">()</span></code>
+          and <code class="computeroutput"><span class="identifier">async_write</span><span class="special">()</span></code>.
+        </p>
+<h6>
+<a name="asio.overview.core.streams.h0"></a>
+          <span><a name="asio.overview.core.streams.why_eof_is_an_error"></a></span><a class="link" href="streams.html#asio.overview.core.streams.why_eof_is_an_error">Why
+          EOF is an Error</a>
+        </h6>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+              The end of a stream can cause <code class="computeroutput"><span class="identifier">read</span></code>,
+              <code class="computeroutput"><span class="identifier">async_read</span></code>, <code class="computeroutput"><span class="identifier">read_until</span></code> or <code class="computeroutput"><span class="identifier">async_read_until</span></code>
+              functions to violate their contract. E.g. a read of N bytes may finish
+              early due to EOF.
+            </li>
+<li class="listitem">
+              An EOF error may be used to distinguish the end of a stream from a
+              successful read of size 0.
+            </li>
+</ul></div>
+<h6>
+<a name="asio.overview.core.streams.h1"></a>
+          <span><a name="asio.overview.core.streams.see_also"></a></span><a class="link" href="streams.html#asio.overview.core.streams.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/async_read.html" title="async_read">async_read()</a>, <a class="link" href="../../reference/async_write.html" title="async_write">async_write()</a>,
+          <a class="link" href="../../reference/read.html" title="read">read()</a>, <a class="link" href="../../reference/write.html" title="write">write()</a>,
+          <a class="link" href="../../reference/AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
+          <a class="link" href="../../reference/AsyncWriteStream.html" title="Buffer-oriented asynchronous write stream requirements">AsyncWriteStream</a>,
+          <a class="link" href="../../reference/SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a>, <a class="link" href="../../reference/SyncWriteStream.html" title="Buffer-oriented synchronous write stream requirements">SyncWriteStream</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="buffers.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="reactor.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/core/threads.html

@@ -0,0 +1,124 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Threads and Asio</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../core.html" title="Core Concepts and Functionality">
+<link rel="prev" href="async.html" title="The Proactor Design Pattern: Concurrency Without Threads">
+<link rel="next" href="strands.html" title="Strands: Use Threads Without Explicit Locking">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="async.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="strands.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.core.threads"></a><a class="link" href="threads.html" title="Threads and Asio">Threads and Asio</a>
+</h4></div></div></div>
+<h6>
+<a name="asio.overview.core.threads.h0"></a>
+          <span><a name="asio.overview.core.threads.thread_safety"></a></span><a class="link" href="threads.html#asio.overview.core.threads.thread_safety">Thread
+          Safety</a>
+        </h6>
+<p>
+          In general, it is safe to make concurrent use of distinct objects, but
+          unsafe to make concurrent use of a single object. However, types such as
+          <code class="computeroutput"><span class="identifier">io_context</span></code> provide a stronger
+          guarantee that it is safe to use a single object concurrently.
+        </p>
+<h6>
+<a name="asio.overview.core.threads.h1"></a>
+          <span><a name="asio.overview.core.threads.thread_pools"></a></span><a class="link" href="threads.html#asio.overview.core.threads.thread_pools">Thread
+          Pools</a>
+        </h6>
+<p>
+          Multiple threads may call <code class="computeroutput"><span class="identifier">io_context</span><span class="special">::</span><span class="identifier">run</span><span class="special">()</span></code> to set up a pool of threads from which
+          completion handlers may be invoked. This approach may also be used with
+          <code class="computeroutput"><span class="identifier">post</span><span class="special">()</span></code>
+          as a means to perform arbitrary computational tasks across a thread pool.
+        </p>
+<p>
+          Note that all threads that have joined an <code class="computeroutput"><span class="identifier">io_context</span></code>'s
+          pool are considered equivalent, and the <code class="computeroutput"><span class="identifier">io_context</span></code>
+          may distribute work across them in an arbitrary fashion.
+        </p>
+<h6>
+<a name="asio.overview.core.threads.h2"></a>
+          <span><a name="asio.overview.core.threads.internal_threads"></a></span><a class="link" href="threads.html#asio.overview.core.threads.internal_threads">Internal
+          Threads</a>
+        </h6>
+<p>
+          The implementation of this library for a particular platform may make use
+          of one or more internal threads to emulate asynchronicity. As far as possible,
+          these threads must be invisible to the library user. In particular, the
+          threads:
+        </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+              must not call the user's code directly; and
+            </li>
+<li class="listitem">
+              must block all signals.
+            </li>
+</ul></div>
+<p>
+          This approach is complemented by the following guarantee:
+        </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+              Asynchronous completion handlers will only be called from threads that
+              are currently calling <code class="computeroutput"><span class="identifier">io_context</span><span class="special">::</span><span class="identifier">run</span><span class="special">()</span></code>.
+            </li></ul></div>
+<p>
+          Consequently, it is the library user's responsibility to create and manage
+          all threads to which the notifications will be delivered.
+        </p>
+<p>
+          The reasons for this approach include:
+        </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+              By only calling <code class="computeroutput"><span class="identifier">io_context</span><span class="special">::</span><span class="identifier">run</span><span class="special">()</span></code> from a single thread, the user's
+              code can avoid the development complexity associated with synchronisation.
+              For example, a library user can implement scalable servers that are
+              single-threaded (from the user's point of view).
+            </li>
+<li class="listitem">
+              A library user may need to perform initialisation in a thread shortly
+              after the thread starts and before any other application code is executed.
+              For example, users of Microsoft's COM must call <code class="computeroutput"><span class="identifier">CoInitializeEx</span></code>
+              before any other COM operations can be called from that thread.
+            </li>
+<li class="listitem">
+              The library interface is decoupled from interfaces for thread creation
+              and management, and permits implementations on platforms where threads
+              are not available.
+            </li>
+</ul></div>
+<h6>
+<a name="asio.overview.core.threads.h3"></a>
+          <span><a name="asio.overview.core.threads.see_also"></a></span><a class="link" href="threads.html#asio.overview.core.threads.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/io_context.html" title="io_context">io_context</a>, <a class="link" href="../../reference/post.html" title="post">post</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="async.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../core.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="strands.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/cpp2011.html

@@ -0,0 +1,65 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>C++ 2011 Support</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../overview.html" title="Overview">
+<link rel="prev" href="ssl.html" title="SSL">
+<link rel="next" href="cpp2011/system_error.html" title="System Errors and Error Codes">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="ssl.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="cpp2011/system_error.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.overview.cpp2011"></a><a class="link" href="cpp2011.html" title="C++ 2011 Support">C++ 2011 Support</a>
+</h3></div></div></div>
+<p>
+        <a class="link" href="cpp2011/system_error.html" title="System Errors and Error Codes">System Errors and Error
+        Codes</a>
+      </p>
+<p>
+        <a class="link" href="cpp2011/move_objects.html" title="Movable I/O Objects">Movable I/O Objects</a>
+      </p>
+<p>
+        <a class="link" href="cpp2011/move_handlers.html" title="Movable Handlers">Movable Handlers</a>
+      </p>
+<p>
+        <a class="link" href="cpp2011/variadic.html" title="Variadic Templates">Variadic Templates</a>
+      </p>
+<p>
+        <a class="link" href="cpp2011/array.html" title="Array Container">Array Container</a>
+      </p>
+<p>
+        <a class="link" href="cpp2011/atomic.html" title="Atomics">Atomics</a>
+      </p>
+<p>
+        <a class="link" href="cpp2011/shared_ptr.html" title="Shared Pointers">Shared Pointers</a>
+      </p>
+<p>
+        <a class="link" href="cpp2011/chrono.html" title="Chrono">Chrono</a>
+      </p>
+<p>
+        <a class="link" href="cpp2011/futures.html" title="Futures">Futures</a>
+      </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="ssl.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="cpp2011/system_error.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/cpp2011/array.html

@@ -0,0 +1,63 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Array Container</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../cpp2011.html" title="C++ 2011 Support">
+<link rel="prev" href="variadic.html" title="Variadic Templates">
+<link rel="next" href="atomic.html" title="Atomics">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="variadic.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="atomic.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.cpp2011.array"></a><a class="link" href="array.html" title="Array Container">Array Container</a>
+</h4></div></div></div>
+<p>
+          Where the standard library provides <code class="computeroutput">std::array&lt;&gt;</code>, Asio:
+        </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+              Provides overloads for the <a class="link" href="../../reference/buffer.html" title="buffer">buffer()</a>
+              function.
+            </li>
+<li class="listitem">
+              Uses it in preference to <code class="computeroutput">boost::array&lt;&gt;</code> for the
+              <a class="link" href="../../reference/ip__address_v4/bytes_type.html" title="ip::address_v4::bytes_type">ip::address_v4::bytes_type</a>
+              and <a class="link" href="../../reference/ip__address_v6/bytes_type.html" title="ip::address_v6::bytes_type">ip::address_v6::bytes_type</a>
+              types.
+            </li>
+<li class="listitem">
+              Uses it in preference to <code class="computeroutput">boost::array&lt;&gt;</code> where a
+              fixed size array type is needed in the implementation.
+            </li>
+</ul></div>
+<p>
+          Support for <code class="computeroutput">std::array&lt;&gt;</code> is automatically enabled for
+          <code class="literal">g++</code> 4.3 and later, when the <code class="literal">-std=c++0x</code>
+          or <code class="literal">-std=gnu++0x</code> compiler options are used, as well as
+          for Microsoft Visual C++ 10. It may be disabled by defining <code class="computeroutput">ASIO_DISABLE_STD_ARRAY</code>,
+          or explicitly enabled for other compilers by defining <code class="computeroutput">ASIO_HAS_STD_ARRAY</code>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="variadic.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="atomic.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/cpp2011/atomic.html

@@ -0,0 +1,48 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Atomics</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../cpp2011.html" title="C++ 2011 Support">
+<link rel="prev" href="array.html" title="Array Container">
+<link rel="next" href="shared_ptr.html" title="Shared Pointers">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="array.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="shared_ptr.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.cpp2011.atomic"></a><a class="link" href="atomic.html" title="Atomics">Atomics</a>
+</h4></div></div></div>
+<p>
+          Asio's implementation can use <code class="computeroutput">std::atomic&lt;&gt;</code> in preference
+          to <code class="computeroutput">boost::detail::atomic_count</code>.
+        </p>
+<p>
+          Support for the standard atomic integer template is automatically enabled
+          for <code class="literal">g++</code> 4.5 and later, when the <code class="literal">-std=c++0x</code>
+          or <code class="literal">-std=gnu++0x</code> compiler options are used. It may be
+          disabled by defining <code class="computeroutput">ASIO_DISABLE_STD_ATOMIC</code>, or explicitly
+          enabled for other compilers by defining <code class="computeroutput">ASIO_HAS_STD_ATOMIC</code>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="array.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="shared_ptr.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/cpp2011/chrono.html

@@ -0,0 +1,59 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Chrono</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../cpp2011.html" title="C++ 2011 Support">
+<link rel="prev" href="shared_ptr.html" title="Shared Pointers">
+<link rel="next" href="futures.html" title="Futures">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="shared_ptr.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="futures.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.cpp2011.chrono"></a><a class="link" href="chrono.html" title="Chrono">Chrono</a>
+</h4></div></div></div>
+<p>
+          Asio provides timers based on the <code class="computeroutput">std::chrono</code> facilities via
+          the <a class="link" href="../../reference/basic_waitable_timer.html" title="basic_waitable_timer">basic_waitable_timer</a>
+          class template. The typedefs <a class="link" href="../../reference/system_timer.html" title="system_timer">system_timer</a>,
+          <a class="link" href="../../reference/steady_timer.html" title="steady_timer">steady_timer</a> and <a class="link" href="../../reference/high_resolution_timer.html" title="high_resolution_timer">high_resolution_timer</a>
+          utilise the standard clocks <code class="computeroutput">system_clock</code>, <code class="computeroutput">steady_clock</code>
+          and <code class="computeroutput">high_resolution_clock</code> respectively.
+        </p>
+<p>
+          Support for the <code class="computeroutput">std::chrono</code> facilities is automatically enabled
+          for <code class="literal">g++</code> 4.6 and later, when the <code class="literal">-std=c++0x</code>
+          or <code class="literal">-std=gnu++0x</code> compiler options are used. (Note that,
+          for <code class="literal">g++</code>, the draft-standard <code class="computeroutput">monotonic_clock</code>
+          is used in place of <code class="computeroutput">steady_clock</code>.) Support may be disabled
+          by defining <code class="computeroutput">ASIO_DISABLE_STD_CHRONO</code>, or explicitly enabled
+          for other compilers by defining <code class="computeroutput">ASIO_HAS_STD_CHRONO</code>.
+        </p>
+<p>
+          When standard <code class="computeroutput">chrono</code> is unavailable, Asio will otherwise use
+          the Boost.Chrono library. The <a class="link" href="../../reference/basic_waitable_timer.html" title="basic_waitable_timer">basic_waitable_timer</a>
+          class template may be used with either.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="shared_ptr.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="futures.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/cpp2011/futures.html

@@ -0,0 +1,75 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Futures</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../cpp2011.html" title="C++ 2011 Support">
+<link rel="prev" href="chrono.html" title="Chrono">
+<link rel="next" href="../implementation.html" title="Platform-Specific Implementation Notes">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="chrono.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="../implementation.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.cpp2011.futures"></a><a class="link" href="futures.html" title="Futures">Futures</a>
+</h4></div></div></div>
+<p>
+          The <code class="computeroutput">asio::use_future</code> special value provides first-class support
+          for returning a C++11 <code class="computeroutput">std::future</code> from an asynchronous operation's
+          initiating function.
+        </p>
+<p>
+          To use <code class="computeroutput">asio::use_future</code>, pass it to an asynchronous operation
+          instead of a normal completion handler. For example:
+        </p>
+<pre class="programlisting">std::future&lt;std::size_t&gt; length =
+  my_socket.async_read_some(my_buffer, asio::use_future);
+</pre>
+<p>
+          Where a handler signature has the form:
+        </p>
+<pre class="programlisting">void handler(asio::error_code ec, result_type result);
+</pre>
+<p>
+          the initiating function returns a <code class="computeroutput">std::future</code> templated on
+          <code class="computeroutput">result_type</code>. In the above example, this is <code class="computeroutput">std::size_t</code>.
+          If the asynchronous operation fails, the <code class="computeroutput">error_code</code> is converted
+          into a <code class="computeroutput">system_error</code> exception and passed back to the caller
+          through the future.
+        </p>
+<p>
+          Where a handler signature has the form:
+        </p>
+<pre class="programlisting">void handler(asio::error_code ec);
+</pre>
+<p>
+          the initiating function returns <code class="computeroutput">std::future&lt;void&gt;</code>. As
+          above, an error is passed back in the future as a <code class="computeroutput">system_error</code>
+          exception.
+        </p>
+<p>
+          <a class="link" href="../../reference/use_future.html" title="use_future">use_future</a>, <a class="link" href="../../reference/use_future_t.html" title="use_future_t">use_future_t</a>,
+          <a class="link" href="../../examples/cpp11_examples.html#asio.examples.cpp11_examples.futures">Futures example (C++11)</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="chrono.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="../implementation.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/cpp2011/move_handlers.html

@@ -0,0 +1,81 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Movable Handlers</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../cpp2011.html" title="C++ 2011 Support">
+<link rel="prev" href="move_objects.html" title="Movable I/O Objects">
+<link rel="next" href="variadic.html" title="Variadic Templates">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="move_objects.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="variadic.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.cpp2011.move_handlers"></a><a class="link" href="move_handlers.html" title="Movable Handlers">Movable Handlers</a>
+</h4></div></div></div>
+<p>
+          With C++11 and later, user-defined completion handlers are only required
+          to be move constructible, and are not required to be copy constructible.
+        </p>
+<p>
+          When move support is enabled, asynchronous that are documented as follows:
+        </p>
+<pre class="programlisting">template &lt;typename Handler&gt;
+void async_XYZ(..., Handler handler);
+</pre>
+<p>
+          are actually declared as:
+        </p>
+<pre class="programlisting">template &lt;typename Handler&gt;
+void async_XYZ(..., Handler&amp;&amp; handler);
+</pre>
+<p>
+          The handler argument is perfectly forwarded and the move construction occurs
+          within the body of <code class="computeroutput">async_XYZ()</code>. This ensures that all other
+          function arguments are evaluated prior to the move. This is critical when
+          the other arguments to <code class="computeroutput">async_XYZ()</code> are members of the handler.
+          For example:
+        </p>
+<pre class="programlisting">struct my_operation
+{
+  unique_ptr&lt;tcp::socket&gt; socket;
+  unique_ptr&lt;vector&lt;char&gt;&gt; buffer;
+  ...
+  void operator(error_code ec, size_t length)
+  {
+    ...
+    socket-&gt;async_read_some(asio::buffer(*buffer), std::move(*this));
+    ...
+  }
+};
+</pre>
+<p>
+          Move support is automatically enabled for <code class="literal">g++</code> 4.5 and
+          later, when the <code class="literal">-std=c++0x</code> or <code class="literal">-std=gnu++0x</code>
+          compiler options are used. It may be disabled by defining <code class="computeroutput">ASIO_DISABLE_MOVE</code>,
+          or explicitly enabled for other compilers by defining <code class="computeroutput">ASIO_HAS_MOVE</code>.
+          Note that these macros also affect the availability of <a class="link" href="move_objects.html" title="Movable I/O Objects">movable
+          I/O objects</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="move_objects.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="variadic.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/cpp2011/move_objects.html

@@ -0,0 +1,102 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Movable I/O Objects</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../cpp2011.html" title="C++ 2011 Support">
+<link rel="prev" href="system_error.html" title="System Errors and Error Codes">
+<link rel="next" href="move_handlers.html" title="Movable Handlers">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="system_error.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="move_handlers.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.cpp2011.move_objects"></a><a class="link" href="move_objects.html" title="Movable I/O Objects">Movable I/O Objects</a>
+</h4></div></div></div>
+<p>
+          When move support is available (via rvalue references), Asio allows move
+          construction and assignment of sockets, serial ports, POSIX descriptors
+          and Windows handles.
+        </p>
+<p>
+          Move support allows you to write code like:
+        </p>
+<pre class="programlisting">tcp::socket make_socket(io_context&amp; i)
+{
+  tcp::socket s(i);
+  ...
+  std::move(s);
+}
+</pre>
+<p>
+          or:
+        </p>
+<pre class="programlisting">class connection : public enable_shared_from_this&lt;connection&gt;
+{
+private:
+  tcp::socket socket_;
+  ...
+public:
+  connection(tcp::socket&amp;&amp; s) : socket_(std::move(s)) {}
+  ...
+};
+
+...
+
+class server
+{
+private:
+  tcp::acceptor acceptor_;
+  ...
+  void handle_accept(error_code ec, tcp::socket socket)
+  {
+    if (!ec)
+      std::make_shared&lt;connection&gt;(std::move(socket))-&gt;go();
+    acceptor_.async_accept(...);
+  }
+  ...
+};
+</pre>
+<p>
+          as well as:
+        </p>
+<pre class="programlisting">std::vector&lt;tcp::socket&gt; sockets;
+sockets.push_back(tcp::socket(...));
+</pre>
+<p>
+          A word of warning: There is nothing stopping you from moving these objects
+          while there are pending asynchronous operations, but it is unlikely to
+          be a good idea to do so. In particular, composed operations like <a class="link" href="../../reference/async_read.html" title="async_read">async_read()</a> store a reference
+          to the stream object. Moving during the composed operation means that the
+          composed operation may attempt to access a moved-from object.
+        </p>
+<p>
+          Move support is automatically enabled for <code class="literal">g++</code> 4.5 and
+          later, when the <code class="literal">-std=c++0x</code> or <code class="literal">-std=gnu++0x</code>
+          compiler options are used. It may be disabled by defining <code class="computeroutput">ASIO_DISABLE_MOVE</code>,
+          or explicitly enabled for other compilers by defining <code class="computeroutput">ASIO_HAS_MOVE</code>.
+          Note that these macros also affect the availability of <a class="link" href="move_handlers.html" title="Movable Handlers">movable
+          handlers</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="system_error.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="move_handlers.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/cpp2011/shared_ptr.html

@@ -0,0 +1,48 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Shared Pointers</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../cpp2011.html" title="C++ 2011 Support">
+<link rel="prev" href="atomic.html" title="Atomics">
+<link rel="next" href="chrono.html" title="Chrono">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="atomic.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="chrono.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.cpp2011.shared_ptr"></a><a class="link" href="shared_ptr.html" title="Shared Pointers">Shared Pointers</a>
+</h4></div></div></div>
+<p>
+          Asio's implementation can use <code class="computeroutput">std::shared_ptr&lt;&gt;</code> and
+          <code class="computeroutput">std::weak_ptr&lt;&gt;</code> in preference to the Boost equivalents.
+        </p>
+<p>
+          Support for the standard smart pointers is automatically enabled for <code class="literal">g++</code>
+          4.3 and later, when the <code class="literal">-std=c++0x</code> or <code class="literal">-std=gnu++0x</code>
+          compiler options are used, as well as for Microsoft Visual C++ 10. It may
+          be disabled by defining <code class="computeroutput">ASIO_DISABLE_STD_SHARED_PTR</code>, or explicitly
+          enabled for other compilers by defining <code class="computeroutput">ASIO_HAS_STD_SHARED_PTR</code>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="atomic.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="chrono.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/cpp2011/system_error.html

@@ -0,0 +1,50 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>System Errors and Error Codes</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../cpp2011.html" title="C++ 2011 Support">
+<link rel="prev" href="../cpp2011.html" title="C++ 2011 Support">
+<link rel="next" href="move_objects.html" title="Movable I/O Objects">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../cpp2011.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="move_objects.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.cpp2011.system_error"></a><a class="link" href="system_error.html" title="System Errors and Error Codes">System Errors and
+        Error Codes</a>
+</h4></div></div></div>
+<p>
+          When available, Asio can use the <code class="computeroutput">std::error_code</code> and <code class="computeroutput">std::system_error</code>
+          classes for reporting errors. In this case, the names <code class="computeroutput">asio::error_code</code>
+          and <code class="computeroutput">asio::system_error</code> will be typedefs for these standard
+          classes.
+        </p>
+<p>
+          System error support is automatically enabled for <code class="literal">g++</code>
+          4.6 and later, when the <code class="literal">-std=c++0x</code> or <code class="literal">-std=gnu++0x</code>
+          compiler options are used. It may be disabled by defining <code class="computeroutput">ASIO_DISABLE_STD_SYSTEM_ERROR</code>,
+          or explicitly enabled for other compilers by defining <code class="computeroutput">ASIO_HAS_STD_SYSTEM_ERROR</code>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../cpp2011.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="move_objects.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/cpp2011/variadic.html

@@ -0,0 +1,49 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Variadic Templates</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../cpp2011.html" title="C++ 2011 Support">
+<link rel="prev" href="move_handlers.html" title="Movable Handlers">
+<link rel="next" href="array.html" title="Array Container">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="move_handlers.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="array.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.cpp2011.variadic"></a><a class="link" href="variadic.html" title="Variadic Templates">Variadic Templates</a>
+</h4></div></div></div>
+<p>
+          When supported by a compiler, Asio can use variadic templates to implement
+          the <a class="link" href="../../reference/basic_socket_streambuf/connect.html" title="basic_socket_streambuf::connect">basic_socket_streambuf::connect()</a>
+          and <a class="link" href="../../reference/basic_socket_iostream/connect.html" title="basic_socket_iostream::connect">basic_socket_iostream::connect()</a>
+          functions.
+        </p>
+<p>
+          Support for variadic templates is automatically enabled for <code class="literal">g++</code>
+          4.3 and later, when the <code class="literal">-std=c++0x</code> or <code class="literal">-std=gnu++0x</code>
+          compiler options are used. It may be disabled by defining <code class="computeroutput">ASIO_DISABLE_VARIADIC_TEMPLATES</code>,
+          or explicitly enabled for other compilers by defining <code class="computeroutput">ASIO_HAS_VARIADIC_TEMPLATES</code>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="move_handlers.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../cpp2011.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="array.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/implementation.html

@@ -0,0 +1,491 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Platform-Specific Implementation Notes</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../overview.html" title="Overview">
+<link rel="prev" href="cpp2011/futures.html" title="Futures">
+<link rel="next" href="../using.html" title="Using Asio">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="cpp2011/futures.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="../using.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.overview.implementation"></a><a class="link" href="implementation.html" title="Platform-Specific Implementation Notes">Platform-Specific Implementation
+      Notes</a>
+</h3></div></div></div>
+<p>
+        This section lists platform-specific implementation details, such as the
+        default demultiplexing mechanism, the number of threads created internally,
+        and when threads are created.
+      </p>
+<h5>
+<a name="asio.overview.implementation.h0"></a>
+        <span><a name="asio.overview.implementation.linux_kernel_2_4"></a></span><a class="link" href="implementation.html#asio.overview.implementation.linux_kernel_2_4">Linux
+        Kernel 2.4</a>
+      </h5>
+<p>
+        Demultiplexing mechanism:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            Uses <code class="computeroutput">select</code> for demultiplexing. This means that the number
+            of file descriptors in the process cannot be permitted to exceed <code class="computeroutput">FD_SETSIZE</code>.
+          </li></ul></div>
+<p>
+        Threads:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Demultiplexing using <code class="computeroutput">select</code> is performed in one of the threads
+            that calls <code class="computeroutput">io_context::run()</code>, <code class="computeroutput">io_context::run_one()</code>,
+            <code class="computeroutput">io_context::poll()</code> or <code class="computeroutput">io_context::poll_one()</code>.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used to emulate asynchronous
+            host resolution. This thread is created on the first call to either
+            <code class="computeroutput">ip::tcp::resolver::async_resolve()</code> or <code class="computeroutput">ip::udp::resolver::async_resolve()</code>.
+          </li>
+</ul></div>
+<p>
+        Scatter-Gather:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            At most <code class="computeroutput">min(64,IOV_MAX)</code> buffers may be transferred in a
+            single operation.
+          </li></ul></div>
+<h5>
+<a name="asio.overview.implementation.h1"></a>
+        <span><a name="asio.overview.implementation.linux_kernel_2_6"></a></span><a class="link" href="implementation.html#asio.overview.implementation.linux_kernel_2_6">Linux
+        Kernel 2.6</a>
+      </h5>
+<p>
+        Demultiplexing mechanism:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            Uses <code class="computeroutput">epoll</code> for demultiplexing.
+          </li></ul></div>
+<p>
+        Threads:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Demultiplexing using <code class="computeroutput">epoll</code> is performed in one of the threads
+            that calls <code class="computeroutput">io_context::run()</code>, <code class="computeroutput">io_context::run_one()</code>,
+            <code class="computeroutput">io_context::poll()</code> or <code class="computeroutput">io_context::poll_one()</code>.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used to emulate asynchronous
+            host resolution. This thread is created on the first call to either
+            <code class="computeroutput">ip::tcp::resolver::async_resolve()</code> or <code class="computeroutput">ip::udp::resolver::async_resolve()</code>.
+          </li>
+</ul></div>
+<p>
+        Scatter-Gather:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            At most <code class="computeroutput">min(64,IOV_MAX)</code> buffers may be transferred in a
+            single operation.
+          </li></ul></div>
+<h5>
+<a name="asio.overview.implementation.h2"></a>
+        <span><a name="asio.overview.implementation.solaris"></a></span><a class="link" href="implementation.html#asio.overview.implementation.solaris">Solaris</a>
+      </h5>
+<p>
+        Demultiplexing mechanism:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            Uses <code class="literal">/dev/poll</code> for demultiplexing.
+          </li></ul></div>
+<p>
+        Threads:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Demultiplexing using <code class="literal">/dev/poll</code> is performed in one
+            of the threads that calls <code class="computeroutput">io_context::run()</code>, <code class="computeroutput">io_context::run_one()</code>,
+            <code class="computeroutput">io_context::poll()</code> or <code class="computeroutput">io_context::poll_one()</code>.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used to emulate asynchronous
+            host resolution. This thread is created on the first call to either
+            <code class="computeroutput">ip::tcp::resolver::async_resolve()</code> or <code class="computeroutput">ip::udp::resolver::async_resolve()</code>.
+          </li>
+</ul></div>
+<p>
+        Scatter-Gather:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            At most <code class="computeroutput">min(64,IOV_MAX)</code> buffers may be transferred in a
+            single operation.
+          </li></ul></div>
+<h5>
+<a name="asio.overview.implementation.h3"></a>
+        <span><a name="asio.overview.implementation.qnx_neutrino"></a></span><a class="link" href="implementation.html#asio.overview.implementation.qnx_neutrino">QNX
+        Neutrino</a>
+      </h5>
+<p>
+        Demultiplexing mechanism:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            Uses <code class="computeroutput">select</code> for demultiplexing. This means that the number
+            of file descriptors in the process cannot be permitted to exceed <code class="computeroutput">FD_SETSIZE</code>.
+          </li></ul></div>
+<p>
+        Threads:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Demultiplexing using <code class="computeroutput">select</code> is performed in one of the threads
+            that calls <code class="computeroutput">io_context::run()</code>, <code class="computeroutput">io_context::run_one()</code>,
+            <code class="computeroutput">io_context::poll()</code> or <code class="computeroutput">io_context::poll_one()</code>.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used to emulate asynchronous
+            host resolution. This thread is created on the first call to either
+            <code class="computeroutput">ip::tcp::resolver::async_resolve()</code> or <code class="computeroutput">ip::udp::resolver::async_resolve()</code>.
+          </li>
+</ul></div>
+<p>
+        Scatter-Gather:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            At most <code class="computeroutput">min(64,IOV_MAX)</code> buffers may be transferred in a
+            single operation.
+          </li></ul></div>
+<h5>
+<a name="asio.overview.implementation.h4"></a>
+        <span><a name="asio.overview.implementation.mac_os_x"></a></span><a class="link" href="implementation.html#asio.overview.implementation.mac_os_x">Mac
+        OS X</a>
+      </h5>
+<p>
+        Demultiplexing mechanism:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            Uses <code class="computeroutput">kqueue</code> for demultiplexing.
+          </li></ul></div>
+<p>
+        Threads:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Demultiplexing using <code class="computeroutput">kqueue</code> is performed in one of the threads
+            that calls <code class="computeroutput">io_context::run()</code>, <code class="computeroutput">io_context::run_one()</code>,
+            <code class="computeroutput">io_context::poll()</code> or <code class="computeroutput">io_context::poll_one()</code>.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used to emulate asynchronous
+            host resolution. This thread is created on the first call to either
+            <code class="computeroutput">ip::tcp::resolver::async_resolve()</code> or <code class="computeroutput">ip::udp::resolver::async_resolve()</code>.
+          </li>
+</ul></div>
+<p>
+        Scatter-Gather:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            At most <code class="computeroutput">min(64,IOV_MAX)</code> buffers may be transferred in a
+            single operation.
+          </li></ul></div>
+<h5>
+<a name="asio.overview.implementation.h5"></a>
+        <span><a name="asio.overview.implementation.freebsd"></a></span><a class="link" href="implementation.html#asio.overview.implementation.freebsd">FreeBSD</a>
+      </h5>
+<p>
+        Demultiplexing mechanism:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            Uses <code class="computeroutput">kqueue</code> for demultiplexing.
+          </li></ul></div>
+<p>
+        Threads:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Demultiplexing using <code class="computeroutput">kqueue</code> is performed in one of the threads
+            that calls <code class="computeroutput">io_context::run()</code>, <code class="computeroutput">io_context::run_one()</code>,
+            <code class="computeroutput">io_context::poll()</code> or <code class="computeroutput">io_context::poll_one()</code>.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used to emulate asynchronous
+            host resolution. This thread is created on the first call to either
+            <code class="computeroutput">ip::tcp::resolver::async_resolve()</code> or <code class="computeroutput">ip::udp::resolver::async_resolve()</code>.
+          </li>
+</ul></div>
+<p>
+        Scatter-Gather:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            At most <code class="computeroutput">min(64,IOV_MAX)</code> buffers may be transferred in a
+            single operation.
+          </li></ul></div>
+<h5>
+<a name="asio.overview.implementation.h6"></a>
+        <span><a name="asio.overview.implementation.aix"></a></span><a class="link" href="implementation.html#asio.overview.implementation.aix">AIX</a>
+      </h5>
+<p>
+        Demultiplexing mechanism:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            Uses <code class="computeroutput">select</code> for demultiplexing. This means that the number
+            of file descriptors in the process cannot be permitted to exceed <code class="computeroutput">FD_SETSIZE</code>.
+          </li></ul></div>
+<p>
+        Threads:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Demultiplexing using <code class="computeroutput">select</code> is performed in one of the threads
+            that calls <code class="computeroutput">io_context::run()</code>, <code class="computeroutput">io_context::run_one()</code>,
+            <code class="computeroutput">io_context::poll()</code> or <code class="computeroutput">io_context::poll_one()</code>.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used to emulate asynchronous
+            host resolution. This thread is created on the first call to either
+            <code class="computeroutput">ip::tcp::resolver::async_resolve()</code> or <code class="computeroutput">ip::udp::resolver::async_resolve()</code>.
+          </li>
+</ul></div>
+<p>
+        Scatter-Gather:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            At most <code class="computeroutput">min(64,IOV_MAX)</code> buffers may be transferred in a
+            single operation.
+          </li></ul></div>
+<h5>
+<a name="asio.overview.implementation.h7"></a>
+        <span><a name="asio.overview.implementation.hp_ux"></a></span><a class="link" href="implementation.html#asio.overview.implementation.hp_ux">HP-UX</a>
+      </h5>
+<p>
+        Demultiplexing mechanism:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            Uses <code class="computeroutput">select</code> for demultiplexing. This means that the number
+            of file descriptors in the process cannot be permitted to exceed <code class="computeroutput">FD_SETSIZE</code>.
+          </li></ul></div>
+<p>
+        Threads:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Demultiplexing using <code class="computeroutput">select</code> is performed in one of the threads
+            that calls <code class="computeroutput">io_context::run()</code>, <code class="computeroutput">io_context::run_one()</code>,
+            <code class="computeroutput">io_context::poll()</code> or <code class="computeroutput">io_context::poll_one()</code>.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used to emulate asynchronous
+            host resolution. This thread is created on the first call to either
+            <code class="computeroutput">ip::tcp::resolver::async_resolve()</code> or <code class="computeroutput">ip::udp::resolver::async_resolve()</code>.
+          </li>
+</ul></div>
+<p>
+        Scatter-Gather:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            At most <code class="computeroutput">min(64,IOV_MAX)</code> buffers may be transferred in a
+            single operation.
+          </li></ul></div>
+<h5>
+<a name="asio.overview.implementation.h8"></a>
+        <span><a name="asio.overview.implementation.tru64"></a></span><a class="link" href="implementation.html#asio.overview.implementation.tru64">Tru64</a>
+      </h5>
+<p>
+        Demultiplexing mechanism:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            Uses <code class="computeroutput">select</code> for demultiplexing. This means that the number
+            of file descriptors in the process cannot be permitted to exceed <code class="computeroutput">FD_SETSIZE</code>.
+          </li></ul></div>
+<p>
+        Threads:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Demultiplexing using <code class="computeroutput">select</code> is performed in one of the threads
+            that calls <code class="computeroutput">io_context::run()</code>, <code class="computeroutput">io_context::run_one()</code>,
+            <code class="computeroutput">io_context::poll()</code> or <code class="computeroutput">io_context::poll_one()</code>.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used to emulate asynchronous
+            host resolution. This thread is created on the first call to either
+            <code class="computeroutput">ip::tcp::resolver::async_resolve()</code> or <code class="computeroutput">ip::udp::resolver::async_resolve()</code>.
+          </li>
+</ul></div>
+<p>
+        Scatter-Gather:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            At most <code class="computeroutput">min(64,IOV_MAX)</code> buffers may be transferred in a
+            single operation.
+          </li></ul></div>
+<h5>
+<a name="asio.overview.implementation.h9"></a>
+        <span><a name="asio.overview.implementation.windows_95__98_and_me"></a></span><a class="link" href="implementation.html#asio.overview.implementation.windows_95__98_and_me">Windows
+        95, 98 and Me</a>
+      </h5>
+<p>
+        Demultiplexing mechanism:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            Uses <code class="computeroutput">select</code> for demultiplexing.
+          </li></ul></div>
+<p>
+        Threads:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Demultiplexing using <code class="computeroutput">select</code> is performed in one of the threads
+            that calls <code class="computeroutput">io_context::run()</code>, <code class="computeroutput">io_context::run_one()</code>,
+            <code class="computeroutput">io_context::poll()</code> or <code class="computeroutput">io_context::poll_one()</code>.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used to emulate asynchronous
+            host resolution. This thread is created on the first call to either
+            <code class="computeroutput">ip::tcp::resolver::async_resolve()</code> or <code class="computeroutput">ip::udp::resolver::async_resolve()</code>.
+          </li>
+</ul></div>
+<p>
+        Scatter-Gather:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            For sockets, at most 16 buffers may be transferred in a single operation.
+          </li></ul></div>
+<h5>
+<a name="asio.overview.implementation.h10"></a>
+        <span><a name="asio.overview.implementation.windows_nt__2000__xp__2003__vista__7_and_8"></a></span><a class="link" href="implementation.html#asio.overview.implementation.windows_nt__2000__xp__2003__vista__7_and_8">Windows
+        NT, 2000, XP, 2003, Vista, 7 and 8</a>
+      </h5>
+<p>
+        Demultiplexing mechanism:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Uses overlapped I/O and I/O completion ports for all asynchronous socket
+            operations except for asynchronous connect.
+          </li>
+<li class="listitem">
+            Uses <code class="computeroutput">select</code> for emulating asynchronous connect.
+          </li>
+</ul></div>
+<p>
+        Threads:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Demultiplexing using I/O completion ports is performed in all threads
+            that call <code class="computeroutput">io_context::run()</code>, <code class="computeroutput">io_context::run_one()</code>,
+            <code class="computeroutput">io_context::poll()</code> or <code class="computeroutput">io_context::poll_one()</code>.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used to trigger timers.
+            This thread is created on construction of the first <code class="computeroutput">basic_deadline_timer</code>
+            or <code class="computeroutput">basic_waitable_timer</code> objects.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used for the <code class="computeroutput">select</code>
+            demultiplexing. This thread is created on the first call to <code class="computeroutput">async_connect()</code>.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used to emulate asynchronous
+            host resolution. This thread is created on the first call to either
+            <code class="computeroutput">ip::tcp::resolver::async_resolve()</code> or <code class="computeroutput">ip::udp::resolver::async_resolve()</code>.
+          </li>
+</ul></div>
+<p>
+        Scatter-Gather:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            For sockets, at most 64 buffers may be transferred in a single operation.
+          </li>
+<li class="listitem">
+            For stream-oriented handles, only one buffer may be transferred in a
+            single operation.
+          </li>
+</ul></div>
+<h5>
+<a name="asio.overview.implementation.h11"></a>
+        <span><a name="asio.overview.implementation.windows_runtime"></a></span><a class="link" href="implementation.html#asio.overview.implementation.windows_runtime">Windows
+        Runtime</a>
+      </h5>
+<p>
+        Asio provides limited support for the Windows Runtime. It requires that the
+        language extensions be enabled. Due to the restricted facilities exposed
+        by the Windows Runtime API, the support comes with the following caveats:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            The core facilities such as the <code class="computeroutput">io_context</code>, <code class="computeroutput">strand</code>,
+            buffers, composed operations, timers, etc., should all work as normal.
+          </li>
+<li class="listitem">
+            For sockets, only client-side TCP is supported.
+          </li>
+<li class="listitem">
+            Explicit binding of a client-side TCP socket is not supported.
+          </li>
+<li class="listitem">
+            The <code class="computeroutput">cancel()</code> function is not supported for sockets. Asynchronous
+            operations may only be cancelled by closing the socket.
+          </li>
+<li class="listitem">
+            Operations that use <code class="computeroutput">null_buffers</code> are not supported.
+          </li>
+<li class="listitem">
+            Only <code class="computeroutput">tcp::no_delay</code> and <code class="computeroutput">socket_base::keep_alive</code>
+            options are supported.
+          </li>
+<li class="listitem">
+            Resolvers do not support service names, only numbers. I.e. you must use
+            "80" rather than "http".
+          </li>
+<li class="listitem">
+            Most resolver query flags have no effect.
+          </li>
+</ul></div>
+<p>
+        Demultiplexing mechanism:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            Uses the <code class="computeroutput">Windows::Networking::Sockets::StreamSocket</code> class
+            to implement asynchronous TCP socket operations.
+          </li></ul></div>
+<p>
+        Threads:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Event completions are delivered to the Windows thread pool and posted
+            to the <code class="computeroutput">io_context</code> for the handler to be executed.
+          </li>
+<li class="listitem">
+            An additional thread per <code class="computeroutput">io_context</code> is used to trigger timers.
+            This thread is created on construction of the first timer objects.
+          </li>
+</ul></div>
+<p>
+        Scatter-Gather:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            For sockets, at most one buffer may be transferred in a single operation.
+          </li></ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="cpp2011/futures.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="../using.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/networking.html

@@ -0,0 +1,53 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Networking</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../overview.html" title="Overview">
+<link rel="prev" href="core/coroutines_ts.html" title="Coroutines TS Support">
+<link rel="next" href="networking/protocols.html" title="TCP, UDP and ICMP">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="core/coroutines_ts.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="networking/protocols.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.overview.networking"></a><a class="link" href="networking.html" title="Networking">Networking</a>
+</h3></div></div></div>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a class="link" href="networking/protocols.html" title="TCP, UDP and ICMP">TCP, UDP and ICMP</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="networking/other_protocols.html" title="Support for Other Protocols">Support for
+            Other Protocols</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="networking/iostreams.html" title="Socket Iostreams">Socket Iostreams</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="networking/bsd_sockets.html" title="The BSD Socket API and Asio">The BSD Socket API
+            and Asio</a>
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="core/coroutines_ts.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="networking/protocols.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/networking/bsd_sockets.html

@@ -0,0 +1,546 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>The BSD Socket API and Asio</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../networking.html" title="Networking">
+<link rel="prev" href="iostreams.html" title="Socket Iostreams">
+<link rel="next" href="../timers.html" title="Timers">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="iostreams.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../networking.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="../timers.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.networking.bsd_sockets"></a><a class="link" href="bsd_sockets.html" title="The BSD Socket API and Asio">The BSD Socket
+        API and Asio</a>
+</h4></div></div></div>
+<p>
+          The Asio library includes a low-level socket interface based on the BSD
+          socket API, which is widely implemented and supported by extensive literature.
+          It is also used as the basis for networking APIs in other languages, like
+          Java. This low-level interface is designed to support the development of
+          efficient and scalable applications. For example, it permits programmers
+          to exert finer control over the number of system calls, avoid redundant
+          data copying, minimise the use of resources like threads, and so on.
+        </p>
+<p>
+          Unsafe and error prone aspects of the BSD socket API are not included.
+          For example, the use of <code class="computeroutput">int</code> to represent all sockets lacks
+          type safety. The socket representation in Asio uses a distinct type for
+          each protocol, e.g. for TCP one would use <code class="computeroutput">ip::tcp::socket</code>,
+          and for UDP one uses <code class="computeroutput">ip::udp::socket</code>.
+        </p>
+<p>
+          The following table shows the mapping between the BSD socket API and Asio:
+        </p>
+<div class="informaltable"><table class="table">
+<colgroup>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                  <p>
+                    BSD Socket API Elements
+                  </p>
+                </th>
+<th>
+                  <p>
+                    Equivalents in Asio
+                  </p>
+                </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                  <p>
+                    socket descriptor - <code class="computeroutput">int</code> (POSIX) or <code class="computeroutput">SOCKET</code>
+                    (Windows)
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/ip__tcp/socket.html" title="ip::tcp::socket">ip::tcp::socket</a>,
+                    <a class="link" href="../../reference/ip__tcp/acceptor.html" title="ip::tcp::acceptor">ip::tcp::acceptor</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/ip__udp/socket.html" title="ip::udp::socket">ip::udp::socket</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket.html" title="basic_socket">basic_socket</a>,
+                    <a class="link" href="../../reference/basic_stream_socket.html" title="basic_stream_socket">basic_stream_socket</a>,
+                    <a class="link" href="../../reference/basic_datagram_socket.html" title="basic_datagram_socket">basic_datagram_socket</a>,
+                    <a class="link" href="../../reference/basic_raw_socket.html" title="basic_raw_socket">basic_raw_socket</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">in_addr</code>, <code class="computeroutput">in6_addr</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    <a class="link" href="../../reference/ip__address.html" title="ip::address">ip::address</a>,
+                    <a class="link" href="../../reference/ip__address.html" title="ip::address">ip::address_v4</a>,
+                    <a class="link" href="../../reference/ip__address.html" title="ip::address">ip::address_v6</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">sockaddr_in</code>, <code class="computeroutput">sockaddr_in6</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/ip__tcp/endpoint.html" title="ip::tcp::endpoint">ip::tcp::endpoint</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/ip__udp/endpoint.html" title="ip::udp::endpoint">ip::udp::endpoint</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/ip__basic_endpoint.html" title="ip::basic_endpoint">ip::basic_endpoint</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">accept()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_socket_acceptor/accept.html" title="basic_socket_acceptor::accept">ip::tcp::acceptor::accept()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket_acceptor/accept.html" title="basic_socket_acceptor::accept">basic_socket_acceptor::accept()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">bind()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_socket/bind.html" title="basic_socket::bind">ip::tcp::acceptor::bind()</a>,
+                    <a class="link" href="../../reference/basic_socket/bind.html" title="basic_socket::bind">ip::tcp::socket::bind()</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_socket/bind.html" title="basic_socket::bind">ip::udp::socket::bind()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket/bind.html" title="basic_socket::bind">basic_socket::bind()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">close()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_socket/close.html" title="basic_socket::close">ip::tcp::acceptor::close()</a>,
+                    <a class="link" href="../../reference/basic_socket/close.html" title="basic_socket::close">ip::tcp::socket::close()</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_socket/close.html" title="basic_socket::close">ip::udp::socket::close()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket/close.html" title="basic_socket::close">basic_socket::close()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">connect()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_socket/connect.html" title="basic_socket::connect">ip::tcp::socket::connect()</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_socket/connect.html" title="basic_socket::connect">ip::udp::socket::connect()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket/connect.html" title="basic_socket::connect">basic_socket::connect()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">getaddrinfo()</code>, <code class="computeroutput">gethostbyaddr()</code>, <code class="computeroutput">gethostbyname()</code>,
+                    <code class="computeroutput">getnameinfo()</code>, <code class="computeroutput">getservbyname()</code>, <code class="computeroutput">getservbyport()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/ip__basic_resolver/resolve.html" title="ip::basic_resolver::resolve">ip::tcp::resolver::resolve()</a>,
+                    <a class="link" href="../../reference/ip__basic_resolver/async_resolve.html" title="ip::basic_resolver::async_resolve">ip::tcp::resolver::async_resolve()</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/ip__basic_resolver/resolve.html" title="ip::basic_resolver::resolve">ip::udp::resolver::resolve()</a>,
+                    <a class="link" href="../../reference/ip__basic_resolver/async_resolve.html" title="ip::basic_resolver::async_resolve">ip::udp::resolver::async_resolve()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/ip__basic_resolver/resolve.html" title="ip::basic_resolver::resolve">ip::basic_resolver::resolve()</a>,
+                    <a class="link" href="../../reference/ip__basic_resolver/async_resolve.html" title="ip::basic_resolver::async_resolve">ip::basic_resolver::async_resolve()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">gethostname()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    <a class="link" href="../../reference/ip__host_name.html" title="ip::host_name">ip::host_name()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">getpeername()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_socket/remote_endpoint.html" title="basic_socket::remote_endpoint">ip::tcp::socket::remote_endpoint()</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_socket/remote_endpoint.html" title="basic_socket::remote_endpoint">ip::udp::socket::remote_endpoint()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket/remote_endpoint.html" title="basic_socket::remote_endpoint">basic_socket::remote_endpoint()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">getsockname()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_socket/local_endpoint.html" title="basic_socket::local_endpoint">ip::tcp::acceptor::local_endpoint()</a>,
+                    <a class="link" href="../../reference/basic_socket/local_endpoint.html" title="basic_socket::local_endpoint">ip::tcp::socket::local_endpoint()</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_socket/local_endpoint.html" title="basic_socket::local_endpoint">ip::udp::socket::local_endpoint()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket/local_endpoint.html" title="basic_socket::local_endpoint">basic_socket::local_endpoint()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">getsockopt()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_socket/get_option.html" title="basic_socket::get_option">ip::tcp::acceptor::get_option()</a>,
+                    <a class="link" href="../../reference/basic_socket/get_option.html" title="basic_socket::get_option">ip::tcp::socket::get_option()</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_socket/get_option.html" title="basic_socket::get_option">ip::udp::socket::get_option()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket/get_option.html" title="basic_socket::get_option">basic_socket::get_option()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">inet_addr()</code>, <code class="computeroutput">inet_aton()</code>, <code class="computeroutput">inet_pton()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    <a class="link" href="../../reference/ip__address/from_string.html" title="ip::address::from_string">ip::address::from_string()</a>,
+                    <a class="link" href="../../reference/ip__address/from_string.html" title="ip::address::from_string">ip::address_v4::from_string()</a>,
+                    <a class="link" href="../../reference/ip__address/from_string.html" title="ip::address::from_string">ip_address_v6::from_string()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">inet_ntoa()</code>, <code class="computeroutput">inet_ntop()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    <a class="link" href="../../reference/ip__address/to_string.html" title="ip::address::to_string">ip::address::to_string()</a>,
+                    <a class="link" href="../../reference/ip__address/to_string.html" title="ip::address::to_string">ip::address_v4::to_string()</a>,
+                    <a class="link" href="../../reference/ip__address/to_string.html" title="ip::address::to_string">ip_address_v6::to_string()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">ioctl()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_socket/io_control.html" title="basic_socket::io_control">ip::tcp::socket::io_control()</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_socket/io_control.html" title="basic_socket::io_control">ip::udp::socket::io_control()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket/io_control.html" title="basic_socket::io_control">basic_socket::io_control()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">listen()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_socket_acceptor/listen.html" title="basic_socket_acceptor::listen">ip::tcp::acceptor::listen()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket_acceptor/listen.html" title="basic_socket_acceptor::listen">basic_socket_acceptor::listen()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">poll()</code>, <code class="computeroutput">select()</code>, <code class="computeroutput">pselect()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    <a class="link" href="../../reference/io_context/run.html" title="io_context::run">io_context::run()</a>,
+                    <a class="link" href="../../reference/io_context/run_one.html" title="io_context::run_one">io_context::run_one()</a>,
+                    <a class="link" href="../../reference/io_context/poll.html" title="io_context::poll">io_context::poll()</a>,
+                    <a class="link" href="../../reference/io_context/poll_one.html" title="io_context::poll_one">io_context::poll_one()</a>
+                  </p>
+                  <p>
+                    Note: in conjunction with asynchronous operations.
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">readv()</code>, <code class="computeroutput">recv()</code>, <code class="computeroutput">read()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_stream_socket/read_some.html" title="basic_stream_socket::read_some">ip::tcp::socket::read_some()</a>,
+                    <a class="link" href="../../reference/basic_stream_socket/async_read_some.html" title="basic_stream_socket::async_read_some">ip::tcp::socket::async_read_some()</a>,
+                    <a class="link" href="../../reference/basic_stream_socket/receive.html" title="basic_stream_socket::receive">ip::tcp::socket::receive()</a>,
+                    <a class="link" href="../../reference/basic_stream_socket/async_receive.html" title="basic_stream_socket::async_receive">ip::tcp::socket::async_receive()</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_datagram_socket/receive.html" title="basic_datagram_socket::receive">ip::udp::socket::receive()</a>,
+                    <a class="link" href="../../reference/basic_datagram_socket/async_receive.html" title="basic_datagram_socket::async_receive">ip::udp::socket::async_receive()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_stream_socket/read_some.html" title="basic_stream_socket::read_some">basic_stream_socket::read_some()</a>,
+                    <a class="link" href="../../reference/basic_stream_socket/async_read_some.html" title="basic_stream_socket::async_read_some">basic_stream_socket::async_read_some()</a>,
+                    <a class="link" href="../../reference/basic_stream_socket/receive.html" title="basic_stream_socket::receive">basic_stream_socket::receive()</a>,
+                    <a class="link" href="../../reference/basic_stream_socket/async_receive.html" title="basic_stream_socket::async_receive">basic_stream_socket::async_receive()</a>,
+                    <a class="link" href="../../reference/basic_datagram_socket/receive.html" title="basic_datagram_socket::receive">basic_datagram_socket::receive()</a>,
+                    <a class="link" href="../../reference/basic_datagram_socket/async_receive.html" title="basic_datagram_socket::async_receive">basic_datagram_socket::async_receive()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">recvfrom()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_datagram_socket/receive_from.html" title="basic_datagram_socket::receive_from">ip::udp::socket::receive_from()</a>,
+                    <a class="link" href="../../reference/basic_datagram_socket/async_receive_from.html" title="basic_datagram_socket::async_receive_from">ip::udp::socket::async_receive_from()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_datagram_socket/receive_from.html" title="basic_datagram_socket::receive_from">basic_datagram_socket::receive_from()</a>,
+                    <a class="link" href="../../reference/basic_datagram_socket/async_receive_from.html" title="basic_datagram_socket::async_receive_from">basic_datagram_socket::async_receive_from()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">send()</code>, <code class="computeroutput">write()</code>, <code class="computeroutput">writev()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_stream_socket/write_some.html" title="basic_stream_socket::write_some">ip::tcp::socket::write_some()</a>,
+                    <a class="link" href="../../reference/basic_stream_socket/async_write_some.html" title="basic_stream_socket::async_write_some">ip::tcp::socket::async_write_some()</a>,
+                    <a class="link" href="../../reference/basic_stream_socket/send.html" title="basic_stream_socket::send">ip::tcp::socket::send()</a>,
+                    <a class="link" href="../../reference/basic_stream_socket/async_send.html" title="basic_stream_socket::async_send">ip::tcp::socket::async_send()</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_datagram_socket/send.html" title="basic_datagram_socket::send">ip::udp::socket::send()</a>,
+                    <a class="link" href="../../reference/basic_datagram_socket/async_send.html" title="basic_datagram_socket::async_send">ip::udp::socket::async_send()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_stream_socket/write_some.html" title="basic_stream_socket::write_some">basic_stream_socket::write_some()</a>,
+                    <a class="link" href="../../reference/basic_stream_socket/async_write_some.html" title="basic_stream_socket::async_write_some">basic_stream_socket::async_write_some()</a>,
+                    <a class="link" href="../../reference/basic_stream_socket/send.html" title="basic_stream_socket::send">basic_stream_socket::send()</a>,
+                    <a class="link" href="../../reference/basic_stream_socket/async_send.html" title="basic_stream_socket::async_send">basic_stream_socket::async_send()</a>,
+                    <a class="link" href="../../reference/basic_datagram_socket/send.html" title="basic_datagram_socket::send">basic_datagram_socket::send()</a>,
+                    <a class="link" href="../../reference/basic_datagram_socket/async_send.html" title="basic_datagram_socket::async_send">basic_datagram_socket::async_send()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">sendto()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_datagram_socket/send_to.html" title="basic_datagram_socket::send_to">ip::udp::socket::send_to()</a>,
+                    <a class="link" href="../../reference/basic_datagram_socket/async_send_to.html" title="basic_datagram_socket::async_send_to">ip::udp::socket::async_send_to()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_datagram_socket/send_to.html" title="basic_datagram_socket::send_to">basic_datagram_socket::send_to()</a>,
+                    <a class="link" href="../../reference/basic_datagram_socket/async_send_to.html" title="basic_datagram_socket::async_send_to">basic_datagram_socket::async_send_to()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">setsockopt()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_socket/set_option.html" title="basic_socket::set_option">ip::tcp::acceptor::set_option()</a>,
+                    <a class="link" href="../../reference/basic_socket/set_option.html" title="basic_socket::set_option">ip::tcp::socket::set_option()</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_socket/set_option.html" title="basic_socket::set_option">ip::udp::socket::set_option()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket/set_option.html" title="basic_socket::set_option">basic_socket::set_option()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">shutdown()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_socket/shutdown.html" title="basic_socket::shutdown">ip::tcp::socket::shutdown()</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_socket/shutdown.html" title="basic_socket::shutdown">ip::udp::socket::shutdown()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket/shutdown.html" title="basic_socket::shutdown">basic_socket::shutdown()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">sockatmark()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_socket/at_mark.html" title="basic_socket::at_mark">ip::tcp::socket::at_mark()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket/at_mark.html" title="basic_socket::at_mark">basic_socket::at_mark()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">socket()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    For TCP: <a class="link" href="../../reference/basic_socket/open.html" title="basic_socket::open">ip::tcp::acceptor::open()</a>,
+                    <a class="link" href="../../reference/basic_socket/open.html" title="basic_socket::open">ip::tcp::socket::open()</a>
+                  </p>
+                  <p>
+                    For UDP: <a class="link" href="../../reference/basic_socket/open.html" title="basic_socket::open">ip::udp::socket::open()</a>
+                  </p>
+                  <p>
+                    <a class="link" href="../../reference/basic_socket/open.html" title="basic_socket::open">basic_socket::open()</a>
+                  </p>
+                </td>
+</tr>
+<tr>
+<td>
+                  <p>
+                    <code class="computeroutput">socketpair()</code>
+                  </p>
+                </td>
+<td>
+                  <p>
+                    <a class="link" href="../../reference/local__connect_pair.html" title="local::connect_pair">local::connect_pair()</a>
+                  </p>
+                  <p>
+                    Note: POSIX operating systems only.
+                  </p>
+                </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="iostreams.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../networking.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="../timers.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/networking/iostreams.html

@@ -0,0 +1,112 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Socket Iostreams</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../networking.html" title="Networking">
+<link rel="prev" href="other_protocols.html" title="Support for Other Protocols">
+<link rel="next" href="bsd_sockets.html" title="The BSD Socket API and Asio">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="other_protocols.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../networking.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="bsd_sockets.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.networking.iostreams"></a><a class="link" href="iostreams.html" title="Socket Iostreams">Socket Iostreams</a>
+</h4></div></div></div>
+<p>
+          Asio includes classes that implement iostreams on top of sockets. These
+          hide away the complexities associated with endpoint resolution, protocol
+          independence, etc. To create a connection one might simply write:
+        </p>
+<pre class="programlisting">ip::tcp::iostream stream("www.boost.org", "http");
+if (!stream)
+{
+  // Can't connect.
+}
+</pre>
+<p>
+          The iostream class can also be used in conjunction with an acceptor to
+          create simple servers. For example:
+        </p>
+<pre class="programlisting">io_context ioc;
+
+ip::tcp::endpoint endpoint(tcp::v4(), 80);
+ip::tcp::acceptor acceptor(ios, endpoint);
+
+for (;;)
+{
+  ip::tcp::iostream stream;
+  acceptor.accept(stream.socket());
+  ...
+}
+</pre>
+<p>
+          Timeouts may be set by calling <code class="computeroutput">expires_at()</code> or <code class="computeroutput">expires_from_now()</code>
+          to establish a deadline. Any socket operations that occur past the deadline
+          will put the iostream into a "bad" state.
+        </p>
+<p>
+          For example, a simple client program like this:
+        </p>
+<pre class="programlisting">ip::tcp::iostream stream;
+stream.expires_from_now(boost::posix_time::seconds(60));
+stream.connect("www.boost.org", "http");
+stream &lt;&lt; "GET /LICENSE_1_0.txt HTTP/1.0\r\n";
+stream &lt;&lt; "Host: www.boost.org\r\n";
+stream &lt;&lt; "Accept: */*\r\n";
+stream &lt;&lt; "Connection: close\r\n\r\n";
+stream.flush();
+std::cout &lt;&lt; stream.rdbuf();
+</pre>
+<p>
+          will fail if all the socket operations combined take longer than 60 seconds.
+        </p>
+<p>
+          If an error does occur, the iostream's <code class="computeroutput">error()</code> member function
+          may be used to retrieve the error code from the most recent system call:
+        </p>
+<pre class="programlisting">if (!stream)
+{
+  std::cout &lt;&lt; "Error: " &lt;&lt; stream.error().message() &lt;&lt; "\n";
+}
+</pre>
+<h6>
+<a name="asio.overview.networking.iostreams.h0"></a>
+          <span><a name="asio.overview.networking.iostreams.see_also"></a></span><a class="link" href="iostreams.html#asio.overview.networking.iostreams.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/ip__tcp/iostream.html" title="ip::tcp::iostream">ip::tcp::iostream</a>,
+          <a class="link" href="../../reference/basic_socket_iostream.html" title="basic_socket_iostream">basic_socket_iostream</a>,
+          <a class="link" href="../../examples/cpp03_examples.html#asio.examples.cpp03_examples.iostreams">iostreams examples</a>.
+        </p>
+<h6>
+<a name="asio.overview.networking.iostreams.h1"></a>
+          <span><a name="asio.overview.networking.iostreams.notes"></a></span><a class="link" href="iostreams.html#asio.overview.networking.iostreams.notes">Notes</a>
+        </h6>
+<p>
+          These iostream templates only support <code class="computeroutput">char</code>, not <code class="computeroutput">wchar_t</code>,
+          and do not perform any code conversion.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="other_protocols.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../networking.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="bsd_sockets.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/networking/other_protocols.html

@@ -0,0 +1,152 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Support for Other Protocols</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../networking.html" title="Networking">
+<link rel="prev" href="protocols.html" title="TCP, UDP and ICMP">
+<link rel="next" href="iostreams.html" title="Socket Iostreams">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="protocols.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../networking.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="iostreams.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.networking.other_protocols"></a><a class="link" href="other_protocols.html" title="Support for Other Protocols">Support for
+        Other Protocols</a>
+</h4></div></div></div>
+<p>
+          Support for other socket protocols (such as Bluetooth or IRCOMM sockets)
+          can be added by implementing the <a class="link" href="../../reference/Protocol.html" title="Protocol requirements">protocol
+          type requirements</a>. However, in many cases these protocols may also
+          be used with Asio's generic protocol support. For this, Asio provides the
+          following four classes:
+        </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+              <a class="link" href="../../reference/generic__datagram_protocol.html" title="generic::datagram_protocol"><code class="computeroutput">generic::datagram_protocol</code></a>
+            </li>
+<li class="listitem">
+              <a class="link" href="../../reference/generic__raw_protocol.html" title="generic::raw_protocol"><code class="computeroutput">generic::raw_protocol</code></a>
+            </li>
+<li class="listitem">
+              <a class="link" href="../../reference/generic__seq_packet_protocol.html" title="generic::seq_packet_protocol"><code class="computeroutput">generic::seq_packet_protocol</code></a>
+            </li>
+<li class="listitem">
+              <a class="link" href="../../reference/generic__stream_protocol.html" title="generic::stream_protocol"><code class="computeroutput">generic::stream_protocol</code></a>
+            </li>
+</ul></div>
+<p>
+          These classes implement the <a class="link" href="../../reference/Protocol.html" title="Protocol requirements">protocol
+          type requirements</a>, but allow the user to specify the address family
+          (e.g. <code class="computeroutput">AF_INET</code>) and protocol type (e.g. <code class="computeroutput">IPPROTO_TCP</code>)
+          at runtime. For example:
+        </p>
+<pre class="programlisting">asio::generic::stream_protocol::socket my_socket(my_io_context);
+my_socket.open(asio::generic::stream_protocol(AF_INET, IPPROTO_TCP));
+...
+</pre>
+<p>
+          An endpoint class template, <a class="link" href="../../reference/generic__basic_endpoint.html" title="generic::basic_endpoint"><code class="computeroutput">asio::generic::basic_endpoint</code></a>,
+          is included to support these protocol classes. This endpoint can hold any
+          other endpoint type, provided its native representation fits into a <code class="computeroutput">sockaddr_storage</code>
+          object. This class will also convert from other types that implement the
+          <a class="link" href="../../reference/Endpoint.html" title="Endpoint requirements">endpoint</a> type requirements:
+        </p>
+<pre class="programlisting">asio::ip::tcp::endpoint my_endpoint1 = ...;
+asio::generic::stream_protocol::endpoint my_endpoint2(my_endpoint1);
+</pre>
+<p>
+          The conversion is implicit, so as to support the following use cases:
+        </p>
+<pre class="programlisting">asio::generic::stream_protocol::socket my_socket(my_io_context);
+asio::ip::tcp::endpoint my_endpoint = ...;
+my_socket.connect(my_endpoint);
+</pre>
+<h6>
+<a name="asio.overview.networking.other_protocols.h0"></a>
+          <span><a name="asio.overview.networking.other_protocols.c__11_move_construction"></a></span><a class="link" href="other_protocols.html#asio.overview.networking.other_protocols.c__11_move_construction">C++11
+          Move Construction</a>
+        </h6>
+<p>
+          When using C++11, it is possible to perform move construction from a socket
+          (or acceptor) object to convert to the more generic protocol's socket (or
+          acceptor) type. If the protocol conversion is valid:
+        </p>
+<pre class="programlisting">Protocol1 p1 = ...;
+Protocol2 p2(p1);
+</pre>
+<p>
+          then the corresponding socket conversion is allowed:
+        </p>
+<pre class="programlisting">Protocol1::socket my_socket1(my_io_context);
+...
+Protocol2::socket my_socket2(std::move(my_socket1));
+</pre>
+<p>
+          For example, one possible conversion is from a TCP socket to a generic
+          stream-oriented socket:
+        </p>
+<pre class="programlisting">asio::ip::tcp::socket my_socket1(my_io_context);
+...
+asio::generic::stream_protocol::socket my_socket2(std::move(my_socket1));
+</pre>
+<p>
+          These conversions are also available for move-assignment.
+        </p>
+<p>
+          These conversions are not limited to the above generic protocol classes.
+          User-defined protocols may take advantage of this feature by similarly
+          ensuring the conversion from <code class="computeroutput">Protocol1</code> to <code class="computeroutput">Protocol2</code>
+          is valid, as above.
+        </p>
+<h6>
+<a name="asio.overview.networking.other_protocols.h1"></a>
+          <span><a name="asio.overview.networking.other_protocols.accepting_generic_sockets"></a></span><a class="link" href="other_protocols.html#asio.overview.networking.other_protocols.accepting_generic_sockets">Accepting
+          Generic Sockets</a>
+        </h6>
+<p>
+          As a convenience, a socket acceptor's <code class="computeroutput">accept()</code> and <code class="computeroutput">async_accept()</code>
+          functions can directly accept into a different protocol's socket type,
+          provided the corresponding protocol conversion is valid. For example, the
+          following is supported because the protocol <code class="computeroutput">asio::ip::tcp</code>
+          is convertible to <code class="computeroutput">asio::generic::stream_protocol</code>:
+        </p>
+<pre class="programlisting">asio::ip::tcp::acceptor my_acceptor(my_io_context);
+...
+asio::generic::stream_protocol::socket my_socket(my_io_context);
+my_acceptor.accept(my_socket);
+</pre>
+<h6>
+<a name="asio.overview.networking.other_protocols.h2"></a>
+          <span><a name="asio.overview.networking.other_protocols.see_also"></a></span><a class="link" href="other_protocols.html#asio.overview.networking.other_protocols.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/generic__datagram_protocol.html" title="generic::datagram_protocol"><code class="computeroutput">generic::datagram_protocol</code></a>,
+          <a class="link" href="../../reference/generic__raw_protocol.html" title="generic::raw_protocol"><code class="computeroutput">generic::raw_protocol</code></a>,
+          <a class="link" href="../../reference/generic__seq_packet_protocol.html" title="generic::seq_packet_protocol"><code class="computeroutput">generic::seq_packet_protocol</code></a>,
+          <a class="link" href="../../reference/generic__stream_protocol.html" title="generic::stream_protocol"><code class="computeroutput">generic::stream_protocol</code></a>,
+          <a class="link" href="../../reference/Protocol.html" title="Protocol requirements">protocol type requirements</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="protocols.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../networking.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="iostreams.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/networking/protocols.html

@@ -0,0 +1,204 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>TCP, UDP and ICMP</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../networking.html" title="Networking">
+<link rel="prev" href="../networking.html" title="Networking">
+<link rel="next" href="other_protocols.html" title="Support for Other Protocols">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../networking.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../networking.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="other_protocols.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.networking.protocols"></a><a class="link" href="protocols.html" title="TCP, UDP and ICMP">TCP, UDP and ICMP</a>
+</h4></div></div></div>
+<p>
+          Asio provides off-the-shelf support for the internet protocols TCP, UDP
+          and ICMP.
+        </p>
+<h6>
+<a name="asio.overview.networking.protocols.h0"></a>
+          <span><a name="asio.overview.networking.protocols.tcp_clients"></a></span><a class="link" href="protocols.html#asio.overview.networking.protocols.tcp_clients">TCP
+          Clients</a>
+        </h6>
+<p>
+          Hostname resolution is performed using a resolver, where host and service
+          names are looked up and converted into one or more endpoints:
+        </p>
+<pre class="programlisting">ip::tcp::resolver resolver(my_io_context);
+ip::tcp::resolver::query query("www.boost.org", "http");
+ip::tcp::resolver::iterator iter = resolver.resolve(query);
+ip::tcp::resolver::iterator end; // End marker.
+while (iter != end)
+{
+  ip::tcp::endpoint endpoint = *iter++;
+  std::cout &lt;&lt; endpoint &lt;&lt; std::endl;
+}
+</pre>
+<p>
+          The list of endpoints obtained above could contain both IPv4 and IPv6 endpoints,
+          so a program should try each of them until it finds one that works. This
+          keeps the client program independent of a specific IP version.
+        </p>
+<p>
+          To simplify the development of protocol-independent programs, TCP clients
+          may establish connections using the free functions <a class="link" href="../../reference/connect.html" title="connect">connect()</a>
+          and <a class="link" href="../../reference/async_connect.html" title="async_connect">async_connect()</a>.
+          These operations try each endpoint in a list until the socket is successfully
+          connected. For example, a single call:
+        </p>
+<pre class="programlisting">ip::tcp::socket socket(my_io_context);
+asio::connect(socket, resolver.resolve(query));
+</pre>
+<p>
+          will synchronously try all endpoints until one is successfully connected.
+          Similarly, an asynchronous connect may be performed by writing:
+        </p>
+<pre class="programlisting">asio::async_connect(socket_, iter,
+    boost::bind(&amp;client::handle_connect, this,
+      asio::placeholders::error));
+
+// ...
+
+void handle_connect(const error_code&amp; error)
+{
+  if (!error)
+  {
+    // Start read or write operations.
+  }
+  else
+  {
+    // Handle error.
+  }
+}
+</pre>
+<p>
+          When a specific endpoint is available, a socket can be created and connected:
+        </p>
+<pre class="programlisting">ip::tcp::socket socket(my_io_context);
+socket.connect(endpoint);
+</pre>
+<p>
+          Data may be read from or written to a connected TCP socket using the <a class="link" href="../../reference/basic_stream_socket/receive.html" title="basic_stream_socket::receive">receive()</a>,
+          <a class="link" href="../../reference/basic_stream_socket/async_receive.html" title="basic_stream_socket::async_receive">async_receive()</a>,
+          <a class="link" href="../../reference/basic_stream_socket/send.html" title="basic_stream_socket::send">send()</a> or
+          <a class="link" href="../../reference/basic_stream_socket/async_send.html" title="basic_stream_socket::async_send">async_send()</a>
+          member functions. However, as these could result in <a class="link" href="../core/streams.html" title="Streams, Short Reads and Short Writes">short
+          writes or reads</a>, an application will typically use the following
+          operations instead: <a class="link" href="../../reference/read.html" title="read">read()</a>,
+          <a class="link" href="../../reference/async_read.html" title="async_read">async_read()</a>, <a class="link" href="../../reference/write.html" title="write">write()</a>
+          and <a class="link" href="../../reference/async_write.html" title="async_write">async_write()</a>.
+        </p>
+<h6>
+<a name="asio.overview.networking.protocols.h1"></a>
+          <span><a name="asio.overview.networking.protocols.tcp_servers"></a></span><a class="link" href="protocols.html#asio.overview.networking.protocols.tcp_servers">TCP
+          Servers</a>
+        </h6>
+<p>
+          A program uses an acceptor to accept incoming TCP connections:
+        </p>
+<pre class="programlisting">ip::tcp::acceptor acceptor(my_io_context, my_endpoint);
+...
+ip::tcp::socket socket(my_io_context);
+acceptor.accept(socket);
+</pre>
+<p>
+          After a socket has been successfully accepted, it may be read from or written
+          to as illustrated for TCP clients above.
+        </p>
+<h6>
+<a name="asio.overview.networking.protocols.h2"></a>
+          <span><a name="asio.overview.networking.protocols.udp"></a></span><a class="link" href="protocols.html#asio.overview.networking.protocols.udp">UDP</a>
+        </h6>
+<p>
+          UDP hostname resolution is also performed using a resolver:
+        </p>
+<pre class="programlisting">ip::udp::resolver resolver(my_io_context);
+ip::udp::resolver::query query("localhost", "daytime");
+ip::udp::resolver::iterator iter = resolver.resolve(query);
+...
+</pre>
+<p>
+          A UDP socket is typically bound to a local endpoint. The following code
+          will create an IP version 4 UDP socket and bind it to the "any"
+          address on port <code class="computeroutput">12345</code>:
+        </p>
+<pre class="programlisting">ip::udp::endpoint endpoint(ip::udp::v4(), 12345);
+ip::udp::socket socket(my_io_context, endpoint);
+</pre>
+<p>
+          Data may be read from or written to an unconnected UDP socket using the
+          <a class="link" href="../../reference/basic_datagram_socket/receive_from.html" title="basic_datagram_socket::receive_from">receive_from()</a>,
+          <a class="link" href="../../reference/basic_datagram_socket/async_receive_from.html" title="basic_datagram_socket::async_receive_from">async_receive_from()</a>,
+          <a class="link" href="../../reference/basic_datagram_socket/send_to.html" title="basic_datagram_socket::send_to">send_to()</a>
+          or <a class="link" href="../../reference/basic_datagram_socket/async_send_to.html" title="basic_datagram_socket::async_send_to">async_send_to()</a>
+          member functions. For a connected UDP socket, use the <a class="link" href="../../reference/basic_datagram_socket/receive.html" title="basic_datagram_socket::receive">receive()</a>,
+          <a class="link" href="../../reference/basic_datagram_socket/async_receive.html" title="basic_datagram_socket::async_receive">async_receive()</a>,
+          <a class="link" href="../../reference/basic_datagram_socket/send.html" title="basic_datagram_socket::send">send()</a>
+          or <a class="link" href="../../reference/basic_datagram_socket/async_send.html" title="basic_datagram_socket::async_send">async_send()</a>
+          member functions.
+        </p>
+<h6>
+<a name="asio.overview.networking.protocols.h3"></a>
+          <span><a name="asio.overview.networking.protocols.icmp"></a></span><a class="link" href="protocols.html#asio.overview.networking.protocols.icmp">ICMP</a>
+        </h6>
+<p>
+          As with TCP and UDP, ICMP hostname resolution is performed using a resolver:
+        </p>
+<pre class="programlisting">ip::icmp::resolver resolver(my_io_context);
+ip::icmp::resolver::query query("localhost", "");
+ip::icmp::resolver::iterator iter = resolver.resolve(query);
+...
+</pre>
+<p>
+          An ICMP socket may be bound to a local endpoint. The following code will
+          create an IP version 6 ICMP socket and bind it to the "any" address:
+        </p>
+<pre class="programlisting">ip::icmp::endpoint endpoint(ip::icmp::v6(), 0);
+ip::icmp::socket socket(my_io_context, endpoint);
+</pre>
+<p>
+          The port number is not used for ICMP.
+        </p>
+<p>
+          Data may be read from or written to an unconnected ICMP socket using the
+          <a class="link" href="../../reference/basic_raw_socket/receive_from.html" title="basic_raw_socket::receive_from">receive_from()</a>,
+          <a class="link" href="../../reference/basic_raw_socket/async_receive_from.html" title="basic_raw_socket::async_receive_from">async_receive_from()</a>,
+          <a class="link" href="../../reference/basic_raw_socket/send_to.html" title="basic_raw_socket::send_to">send_to()</a>
+          or <a class="link" href="../../reference/basic_raw_socket/async_send_to.html" title="basic_raw_socket::async_send_to">async_send_to()</a>
+          member functions.
+        </p>
+<h6>
+<a name="asio.overview.networking.protocols.h4"></a>
+          <span><a name="asio.overview.networking.protocols.see_also"></a></span><a class="link" href="protocols.html#asio.overview.networking.protocols.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/ip__tcp.html" title="ip::tcp">ip::tcp</a>, <a class="link" href="../../reference/ip__udp.html" title="ip::udp">ip::udp</a>,
+          <a class="link" href="../../reference/ip__icmp.html" title="ip::icmp">ip::icmp</a>, <a class="link" href="../../tutorial/tutdaytime1.html" title="Daytime.1 - A synchronous TCP daytime client">daytime
+          protocol tutorials</a>, <a class="link" href="../../examples/cpp03_examples.html#asio.examples.cpp03_examples.icmp">ICMP
+          ping example</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../networking.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../networking.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="other_protocols.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/posix.html

@@ -0,0 +1,47 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>POSIX-Specific Functionality</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../overview.html" title="Overview">
+<link rel="prev" href="signals.html" title="Signal Handling">
+<link rel="next" href="posix/local.html" title="UNIX Domain Sockets">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="signals.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="posix/local.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.overview.posix"></a><a class="link" href="posix.html" title="POSIX-Specific Functionality">POSIX-Specific Functionality</a>
+</h3></div></div></div>
+<p>
+        <a class="link" href="posix/local.html" title="UNIX Domain Sockets">UNIX Domain Sockets</a>
+      </p>
+<p>
+        <a class="link" href="posix/stream_descriptor.html" title="Stream-Oriented File Descriptors">Stream-Oriented File
+        Descriptors</a>
+      </p>
+<p>
+        <a class="link" href="posix/fork.html" title="Fork">Fork</a>
+      </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="signals.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="posix/local.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/posix/fork.html

@@ -0,0 +1,77 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Fork</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../posix.html" title="POSIX-Specific Functionality">
+<link rel="prev" href="stream_descriptor.html" title="Stream-Oriented File Descriptors">
+<link rel="next" href="../windows.html" title="Windows-Specific Functionality">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="stream_descriptor.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../posix.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="../windows.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.posix.fork"></a><a class="link" href="fork.html" title="Fork">Fork</a>
+</h4></div></div></div>
+<p>
+          Asio supports programs that utilise the <code class="computeroutput">fork()</code> system call.
+          Provided the program calls <code class="computeroutput">io_context.notify_fork()</code> at the
+          appropriate times, Asio will recreate any internal file descriptors (such
+          as the "self-pipe trick" descriptor used for waking up a reactor).
+          The notification is usually performed as follows:
+        </p>
+<pre class="programlisting">io_context_.notify_fork(asio::io_context::fork_prepare);
+if (fork() == 0)
+{
+  io_context_.notify_fork(asio::io_context::fork_child);
+  ...
+}
+else
+{
+  io_context_.notify_fork(asio::io_context::fork_parent);
+  ...
+}
+</pre>
+<p>
+          User-defined services can also be made fork-aware by overriding the <code class="computeroutput">io_context::service::notify_fork()</code>
+          virtual function.
+        </p>
+<p>
+          Note that any file descriptors accessible via Asio's public API (e.g. the
+          descriptors underlying <code class="computeroutput">basic_socket&lt;&gt;</code>, <code class="computeroutput">posix::stream_descriptor</code>,
+          etc.) are not altered during a fork. It is the program's responsibility
+          to manage these as required.
+        </p>
+<h6>
+<a name="asio.overview.posix.fork.h0"></a>
+          <span><a name="asio.overview.posix.fork.see_also"></a></span><a class="link" href="fork.html#asio.overview.posix.fork.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/io_context/notify_fork.html" title="io_context::notify_fork">io_context::notify_fork()</a>,
+          <a class="link" href="../../reference/io_context/fork_event.html" title="io_context::fork_event">io_context::fork_event</a>,
+          <a class="link" href="../../reference/execution_context__service/notify_fork.html" title="execution_context::service::notify_fork">io_context::service::notify_fork()</a>,
+          <a class="link" href="../../examples/cpp03_examples.html#asio.examples.cpp03_examples.fork">Fork examples</a>.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="stream_descriptor.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../posix.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="../windows.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/posix/local.html

@@ -0,0 +1,104 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>UNIX Domain Sockets</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../posix.html" title="POSIX-Specific Functionality">
+<link rel="prev" href="../posix.html" title="POSIX-Specific Functionality">
+<link rel="next" href="stream_descriptor.html" title="Stream-Oriented File Descriptors">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../posix.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../posix.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="stream_descriptor.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.posix.local"></a><a class="link" href="local.html" title="UNIX Domain Sockets">UNIX Domain Sockets</a>
+</h4></div></div></div>
+<p>
+          Asio provides basic support for UNIX domain sockets (also known as local
+          sockets). The simplest use involves creating a pair of connected sockets.
+          The following code:
+        </p>
+<pre class="programlisting">local::stream_protocol::socket socket1(my_io_context);
+local::stream_protocol::socket socket2(my_io_context);
+local::connect_pair(socket1, socket2);
+</pre>
+<p>
+          will create a pair of stream-oriented sockets. To do the same for datagram-oriented
+          sockets, use:
+        </p>
+<pre class="programlisting">local::datagram_protocol::socket socket1(my_io_context);
+local::datagram_protocol::socket socket2(my_io_context);
+local::connect_pair(socket1, socket2);
+</pre>
+<p>
+          A UNIX domain socket server may be created by binding an acceptor to an
+          endpoint, in much the same way as one does for a TCP server:
+        </p>
+<pre class="programlisting">::unlink("/tmp/foobar"); // Remove previous binding.
+local::stream_protocol::endpoint ep("/tmp/foobar");
+local::stream_protocol::acceptor acceptor(my_io_context, ep);
+local::stream_protocol::socket socket(my_io_context);
+acceptor.accept(socket);
+</pre>
+<p>
+          A client that connects to this server might look like:
+        </p>
+<pre class="programlisting">local::stream_protocol::endpoint ep("/tmp/foobar");
+local::stream_protocol::socket socket(my_io_context);
+socket.connect(ep);
+</pre>
+<p>
+          Transmission of file descriptors or credentials across UNIX domain sockets
+          is not directly supported within Asio, but may be achieved by accessing
+          the socket's underlying descriptor using the <a class="link" href="../../reference/basic_socket/native_handle.html" title="basic_socket::native_handle">native_handle()</a>
+          member function.
+        </p>
+<h6>
+<a name="asio.overview.posix.local.h0"></a>
+          <span><a name="asio.overview.posix.local.see_also"></a></span><a class="link" href="local.html#asio.overview.posix.local.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/local__connect_pair.html" title="local::connect_pair">local::connect_pair</a>,
+          <a class="link" href="../../reference/local__datagram_protocol.html" title="local::datagram_protocol">local::datagram_protocol</a>,
+          <a class="link" href="../../reference/local__datagram_protocol/endpoint.html" title="local::datagram_protocol::endpoint">local::datagram_protocol::endpoint</a>,
+          <a class="link" href="../../reference/local__datagram_protocol/socket.html" title="local::datagram_protocol::socket">local::datagram_protocol::socket</a>,
+          <a class="link" href="../../reference/local__stream_protocol.html" title="local::stream_protocol">local::stream_protocol</a>,
+          <a class="link" href="../../reference/local__stream_protocol/acceptor.html" title="local::stream_protocol::acceptor">local::stream_protocol::acceptor</a>,
+          <a class="link" href="../../reference/local__stream_protocol/endpoint.html" title="local::stream_protocol::endpoint">local::stream_protocol::endpoint</a>,
+          <a class="link" href="../../reference/local__stream_protocol/iostream.html" title="local::stream_protocol::iostream">local::stream_protocol::iostream</a>,
+          <a class="link" href="../../reference/local__stream_protocol/socket.html" title="local::stream_protocol::socket">local::stream_protocol::socket</a>,
+          <a class="link" href="../../examples/cpp03_examples.html#asio.examples.cpp03_examples.unix_domain_sockets">UNIX domain
+          sockets examples</a>.
+        </p>
+<h6>
+<a name="asio.overview.posix.local.h1"></a>
+          <span><a name="asio.overview.posix.local.notes"></a></span><a class="link" href="local.html#asio.overview.posix.local.notes">Notes</a>
+        </h6>
+<p>
+          UNIX domain sockets are only available at compile time if supported by
+          the target operating system. A program may test for the macro <code class="computeroutput">ASIO_HAS_LOCAL_SOCKETS</code>
+          to determine whether they are supported.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../posix.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../posix.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="stream_descriptor.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/posix/stream_descriptor.html

@@ -0,0 +1,86 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Stream-Oriented File Descriptors</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../posix.html" title="POSIX-Specific Functionality">
+<link rel="prev" href="local.html" title="UNIX Domain Sockets">
+<link rel="next" href="fork.html" title="Fork">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="local.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../posix.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="fork.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.posix.stream_descriptor"></a><a class="link" href="stream_descriptor.html" title="Stream-Oriented File Descriptors">Stream-Oriented
+        File Descriptors</a>
+</h4></div></div></div>
+<p>
+          Asio includes classes added to permit synchronous and asynchronous read
+          and write operations to be performed on POSIX file descriptors, such as
+          pipes, standard input and output, and various devices.
+        </p>
+<p>
+          These classes also provide limited support for regular files. This support
+          assumes that the underlying read and write operations provided by the operating
+          system never fail with <code class="computeroutput">EAGAIN</code> or <code class="computeroutput">EWOULDBLOCK</code>.
+          (This assumption normally holds for buffered file I/O.) Synchronous and
+          asynchronous read and write operations on file descriptors will succeed
+          but the I/O will always be performed immediately. Wait operations, and
+          operations involving <code class="computeroutput">asio::null_buffers</code>, are not portably
+          supported.
+        </p>
+<p>
+          For example, to perform read and write operations on standard input and
+          output, the following objects may be created:
+        </p>
+<pre class="programlisting">posix::stream_descriptor in(my_io_context, ::dup(STDIN_FILENO));
+posix::stream_descriptor out(my_io_context, ::dup(STDOUT_FILENO));
+</pre>
+<p>
+          These are then used as synchronous or asynchronous read and write streams.
+          This means the objects can be used with any of the <a class="link" href="../../reference/read.html" title="read">read()</a>,
+          <a class="link" href="../../reference/async_read.html" title="async_read">async_read()</a>, <a class="link" href="../../reference/write.html" title="write">write()</a>,
+          <a class="link" href="../../reference/async_write.html" title="async_write">async_write()</a>, <a class="link" href="../../reference/read_until.html" title="read_until">read_until()</a> or <a class="link" href="../../reference/async_read_until.html" title="async_read_until">async_read_until()</a>
+          free functions.
+        </p>
+<h6>
+<a name="asio.overview.posix.stream_descriptor.h0"></a>
+          <span><a name="asio.overview.posix.stream_descriptor.see_also"></a></span><a class="link" href="stream_descriptor.html#asio.overview.posix.stream_descriptor.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/posix__stream_descriptor.html" title="posix::stream_descriptor">posix::stream_descriptor</a>,
+          <a class="link" href="../../examples/cpp03_examples.html#asio.examples.cpp03_examples.chat">Chat example (C++03)</a>,
+          <a class="link" href="../../examples/cpp11_examples.html#asio.examples.cpp11_examples.chat">Chat example (C++11)</a>.
+        </p>
+<h6>
+<a name="asio.overview.posix.stream_descriptor.h1"></a>
+          <span><a name="asio.overview.posix.stream_descriptor.notes"></a></span><a class="link" href="stream_descriptor.html#asio.overview.posix.stream_descriptor.notes">Notes</a>
+        </h6>
+<p>
+          POSIX stream descriptors are only available at compile time if supported
+          by the target operating system. A program may test for the macro <code class="computeroutput">ASIO_HAS_POSIX_STREAM_DESCRIPTOR</code>
+          to determine whether they are supported.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="local.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../posix.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="fork.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/rationale.html

@@ -0,0 +1,97 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Rationale</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../overview.html" title="Overview">
+<link rel="prev" href="../overview.html" title="Overview">
+<link rel="next" href="core.html" title="Core Concepts and Functionality">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../overview.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="core.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.overview.rationale"></a><a class="link" href="rationale.html" title="Rationale">Rationale</a>
+</h3></div></div></div>
+<p>
+        Most programs interact with the outside world in some way, whether it be
+        via a file, a network, a serial cable, or the console. Sometimes, as is the
+        case with networking, individual I/O operations can take a long time to complete.
+        This poses particular challenges to application development.
+      </p>
+<p>
+        Asio provides the tools to manage these long running operations, without
+        requiring programs to use concurrency models based on threads and explicit
+        locking.
+      </p>
+<p>
+        The Asio library is intended for programmers using C++ for systems programming,
+        where access to operating system functionality such as networking is often
+        required. In particular, Asio addresses the following goals:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <span class="bold"><strong>Portability.</strong></span> The library should support
+            a range of commonly used operating systems, and provide consistent behaviour
+            across these operating systems.
+          </li>
+<li class="listitem">
+            <span class="bold"><strong>Scalability.</strong></span> The library should facilitate
+            the development of network applications that scale to thousands of concurrent
+            connections. The library implementation for each operating system should
+            use the mechanism that best enables this scalability.
+          </li>
+<li class="listitem">
+            <span class="bold"><strong>Efficiency.</strong></span> The library should support
+            techniques such as scatter-gather I/O, and allow programs to minimise
+            data copying.
+          </li>
+<li class="listitem">
+            <span class="bold"><strong>Model concepts from established APIs, such as BSD
+            sockets.</strong></span> The BSD socket API is widely implemented and understood,
+            and is covered in much literature. Other programming languages often
+            use a similar interface for networking APIs. As far as is reasonable,
+            Asio should leverage existing practice.
+          </li>
+<li class="listitem">
+            <span class="bold"><strong>Ease of use.</strong></span> The library should provide
+            a lower entry barrier for new users by taking a toolkit, rather than
+            framework, approach. That is, it should try to minimise the up-front
+            investment in time to just learning a few basic rules and guidelines.
+            After that, a library user should only need to understand the specific
+            functions that are being used.
+          </li>
+<li class="listitem">
+            <span class="bold"><strong>Basis for further abstraction.</strong></span> The library
+            should permit the development of other libraries that provide higher
+            levels of abstraction. For example, implementations of commonly used
+            protocols such as HTTP.
+          </li>
+</ul></div>
+<p>
+        Although Asio started life focused primarily on networking, its concepts
+        of asynchronous I/O have been extended to include other operating system
+        resources such as serial ports, file descriptors, and so on.
+      </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../overview.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="core.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/serial_ports.html

@@ -0,0 +1,83 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Serial Ports</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../overview.html" title="Overview">
+<link rel="prev" href="timers.html" title="Timers">
+<link rel="next" href="signals.html" title="Signal Handling">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="timers.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="signals.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.overview.serial_ports"></a><a class="link" href="serial_ports.html" title="Serial Ports">Serial Ports</a>
+</h3></div></div></div>
+<p>
+        Asio includes classes for creating and manipulating serial ports in a portable
+        manner. For example, a serial port may be opened using:
+      </p>
+<pre class="programlisting">serial_port port(my_io_context, name);
+</pre>
+<p>
+        where name is something like <code class="computeroutput">"COM1"</code> on Windows, and
+        <code class="computeroutput">"/dev/ttyS0"</code> on POSIX platforms.
+      </p>
+<p>
+        Once opened, the serial port may be used as a <a class="link" href="core/streams.html" title="Streams, Short Reads and Short Writes">stream</a>.
+        This means the objects can be used with any of the <a class="link" href="../reference/read.html" title="read">read()</a>,
+        <a class="link" href="../reference/async_read.html" title="async_read">async_read()</a>, <a class="link" href="../reference/write.html" title="write">write()</a>,
+        <a class="link" href="../reference/async_write.html" title="async_write">async_write()</a>, <a class="link" href="../reference/read_until.html" title="read_until">read_until()</a>
+        or <a class="link" href="../reference/async_read_until.html" title="async_read_until">async_read_until()</a>
+        free functions.
+      </p>
+<p>
+        The serial port implementation also includes option classes for configuring
+        the port's baud rate, flow control type, parity, stop bits and character
+        size.
+      </p>
+<h5>
+<a name="asio.overview.serial_ports.h0"></a>
+        <span><a name="asio.overview.serial_ports.see_also"></a></span><a class="link" href="serial_ports.html#asio.overview.serial_ports.see_also">See
+        Also</a>
+      </h5>
+<p>
+        <a class="link" href="../reference/serial_port.html" title="serial_port">serial_port</a>, <a class="link" href="../reference/serial_port_base.html" title="serial_port_base">serial_port_base</a>,
+        <a class="link" href="../reference/serial_port_base__baud_rate.html" title="serial_port_base::baud_rate">serial_port_base::baud_rate</a>,
+        <a class="link" href="../reference/serial_port_base__flow_control.html" title="serial_port_base::flow_control">serial_port_base::flow_control</a>,
+        <a class="link" href="../reference/serial_port_base__parity.html" title="serial_port_base::parity">serial_port_base::parity</a>,
+        <a class="link" href="../reference/serial_port_base__stop_bits.html" title="serial_port_base::stop_bits">serial_port_base::stop_bits</a>,
+        <a class="link" href="../reference/serial_port_base__character_size.html" title="serial_port_base::character_size">serial_port_base::character_size</a>.
+      </p>
+<h5>
+<a name="asio.overview.serial_ports.h1"></a>
+        <span><a name="asio.overview.serial_ports.notes"></a></span><a class="link" href="serial_ports.html#asio.overview.serial_ports.notes">Notes</a>
+      </h5>
+<p>
+        Serial ports are available on all POSIX platforms. For Windows, serial ports
+        are only available at compile time when the I/O completion port backend is
+        used (which is the default). A program may test for the macro <code class="computeroutput">ASIO_HAS_SERIAL_PORT</code>
+        to determine whether they are supported.
+      </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="timers.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="signals.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/signals.html

@@ -0,0 +1,76 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Signal Handling</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../overview.html" title="Overview">
+<link rel="prev" href="serial_ports.html" title="Serial Ports">
+<link rel="next" href="posix.html" title="POSIX-Specific Functionality">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="serial_ports.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="posix.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.overview.signals"></a><a class="link" href="signals.html" title="Signal Handling">Signal Handling</a>
+</h3></div></div></div>
+<p>
+        Asio supports signal handling using a class called <a class="link" href="../reference/signal_set.html" title="signal_set">signal_set</a>.
+        Programs may add one or more signals to the set, and then perform an <code class="computeroutput">async_wait()</code>
+        operation. The specified handler will be called when one of the signals occurs.
+        The same signal number may be registered with multiple <a class="link" href="../reference/signal_set.html" title="signal_set">signal_set</a>
+        objects, however the signal number must be used only with Asio.
+      </p>
+<pre class="programlisting">void handler(
+    const asio::error_code&amp; error,
+    int signal_number)
+{
+  if (!error)
+  {
+    // A signal occurred.
+  }
+}
+
+...
+
+// Construct a signal set registered for process termination.
+asio::signal_set signals(io_context, SIGINT, SIGTERM);
+
+// Start an asynchronous wait for one of the signals to occur.
+signals.async_wait(handler);
+</pre>
+<p>
+        Signal handling also works on Windows, as the Microsoft Visual C++ runtime
+        library maps console events like Ctrl+C to the equivalent signal.
+      </p>
+<h5>
+<a name="asio.overview.signals.h0"></a>
+        <span><a name="asio.overview.signals.see_also"></a></span><a class="link" href="signals.html#asio.overview.signals.see_also">See
+        Also</a>
+      </h5>
+<p>
+        <a class="link" href="../reference/signal_set.html" title="signal_set">signal_set</a>, <a class="link" href="../examples/cpp03_examples.html#asio.examples.cpp03_examples.http_server">HTTP
+        server example (C++03)</a>, <a class="link" href="../examples/cpp11_examples.html#asio.examples.cpp11_examples.http_server">HTTP
+        server example (C++11)</a>.
+      </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="serial_ports.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="posix.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/ssl.html

@@ -0,0 +1,189 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>SSL</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../overview.html" title="Overview">
+<link rel="prev" href="windows/object_handle.html" title="Object HANDLEs">
+<link rel="next" href="cpp2011.html" title="C++ 2011 Support">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="windows/object_handle.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="cpp2011.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.overview.ssl"></a><a class="link" href="ssl.html" title="SSL">SSL</a>
+</h3></div></div></div>
+<p>
+        Asio contains classes and class templates for basic SSL support. These classes
+        allow encrypted communication to be layered on top of an existing stream,
+        such as a TCP socket.
+      </p>
+<p>
+        Before creating an encrypted stream, an application must construct an SSL
+        context object. This object is used to set SSL options such as verification
+        mode, certificate files, and so on. As an illustration, client-side initialisation
+        may look something like:
+      </p>
+<pre class="programlisting">ssl::context ctx(ssl::context::sslv23);
+ctx.set_verify_mode(ssl::verify_peer);
+ctx.load_verify_file("ca.pem");
+</pre>
+<p>
+        To use SSL with a TCP socket, one may write:
+      </p>
+<pre class="programlisting">ssl::stream&lt;ip::tcp::socket&gt; ssl_sock(my_io_context, ctx);
+</pre>
+<p>
+        To perform socket-specific operations, such as establishing an outbound connection
+        or accepting an incoming one, the underlying socket must first be obtained
+        using the <code class="computeroutput">ssl::stream</code> template's <a class="link" href="../reference/ssl__stream/lowest_layer.html" title="ssl::stream::lowest_layer"><code class="computeroutput">lowest_layer()</code></a>
+        member function:
+      </p>
+<pre class="programlisting">ip::tcp::socket::lowest_layer_type&amp; sock = ssl_sock.lowest_layer();
+sock.connect(my_endpoint);
+</pre>
+<p>
+        In some use cases the underlying stream object will need to have a longer
+        lifetime than the SSL stream, in which case the template parameter should
+        be a reference to the stream type:
+      </p>
+<pre class="programlisting">ip::tcp::socket sock(my_io_context);
+ssl::stream&lt;ip::tcp::socket&amp;&gt; ssl_sock(sock, ctx);
+</pre>
+<p>
+        SSL handshaking must be performed prior to transmitting or receiving data
+        over an encrypted connection. This is accomplished using the <code class="computeroutput">ssl::stream</code>
+        template's <a class="link" href="../reference/ssl__stream/handshake.html" title="ssl::stream::handshake">handshake()</a>
+        or <a class="link" href="../reference/ssl__stream/async_handshake.html" title="ssl::stream::async_handshake">async_handshake()</a>
+        member functions.
+      </p>
+<p>
+        Once connected, SSL stream objects are used as synchronous or asynchronous
+        read and write streams. This means the objects can be used with any of the
+        <a class="link" href="../reference/read.html" title="read">read()</a>, <a class="link" href="../reference/async_read.html" title="async_read">async_read()</a>,
+        <a class="link" href="../reference/write.html" title="write">write()</a>, <a class="link" href="../reference/async_write.html" title="async_write">async_write()</a>,
+        <a class="link" href="../reference/read_until.html" title="read_until">read_until()</a> or <a class="link" href="../reference/async_read_until.html" title="async_read_until">async_read_until()</a>
+        free functions.
+      </p>
+<h5>
+<a name="asio.overview.ssl.h0"></a>
+        <span><a name="asio.overview.ssl.certificate_verification"></a></span><a class="link" href="ssl.html#asio.overview.ssl.certificate_verification">Certificate
+        Verification</a>
+      </h5>
+<p>
+        Asio provides various methods for configuring the way SSL certificates are
+        verified:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a class="link" href="../reference/ssl__context/set_default_verify_paths.html" title="ssl::context::set_default_verify_paths">ssl::context::set_default_verify_paths()</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="../reference/ssl__context/set_verify_mode.html" title="ssl::context::set_verify_mode">ssl::context::set_verify_mode()</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="../reference/ssl__context/set_verify_callback.html" title="ssl::context::set_verify_callback">ssl::context::set_verify_callback()</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="../reference/ssl__context/load_verify_file.html" title="ssl::context::load_verify_file">ssl::context::load_verify_file()</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="../reference/ssl__stream/set_verify_mode.html" title="ssl::stream::set_verify_mode">ssl::stream::set_verify_mode()</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="../reference/ssl__stream/set_verify_callback.html" title="ssl::stream::set_verify_callback">ssl::stream::set_verify_callback()</a>
+          </li>
+</ul></div>
+<p>
+        To simplify use cases where certificates are verified according to the rules
+        in RFC 6125 (identity verification in the context of Transport Layer Security),
+        Asio provides a reusable verification callback as a function object:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+            <a class="link" href="../reference/ssl__host_name_verification.html" title="ssl::host_name_verification">ssl::host_name_verification</a>
+          </li></ul></div>
+<p>
+        The following example shows verification of a remote host's certificate according
+        to the rules used by HTTPS:
+      </p>
+<pre class="programlisting">using asio::ip::tcp;
+namespace ssl = asio::ssl;
+typedef ssl::stream&lt;tcp::socket&gt; ssl_socket;
+
+// Create a context that uses the default paths for
+// finding CA certificates.
+ssl::context ctx(ssl::context::sslv23);
+ctx.set_default_verify_paths();
+
+// Open a socket and connect it to the remote host.
+asio::io_context io_context;
+ssl_socket sock(io_context, ctx);
+tcp::resolver resolver(io_context);
+tcp::resolver::query query("host.name", "https");
+asio::connect(sock.lowest_layer(), resolver.resolve(query));
+sock.lowest_layer().set_option(tcp::no_delay(true));
+
+// Perform SSL handshake and verify the remote host's
+// certificate.
+sock.set_verify_mode(ssl::verify_peer);
+sock.set_verify_callback(ssl::host_name_verification("host.name"));
+sock.handshake(ssl_socket::client);
+
+// ... read and write as normal ...
+</pre>
+<h5>
+<a name="asio.overview.ssl.h1"></a>
+        <span><a name="asio.overview.ssl.ssl_and_threads"></a></span><a class="link" href="ssl.html#asio.overview.ssl.ssl_and_threads">SSL
+        and Threads</a>
+      </h5>
+<p>
+        SSL stream objects perform no locking of their own. Therefore, it is essential
+        that all asynchronous SSL operations are performed in an implicit or explicit
+        <a class="link" href="core/strands.html" title="Strands: Use Threads Without Explicit Locking">strand</a>. Note that this
+        means that no synchronisation is required (and so no locking overhead is
+        incurred) in single threaded programs.
+      </p>
+<h5>
+<a name="asio.overview.ssl.h2"></a>
+        <span><a name="asio.overview.ssl.see_also"></a></span><a class="link" href="ssl.html#asio.overview.ssl.see_also">See
+        Also</a>
+      </h5>
+<p>
+        <a class="link" href="../reference/ssl__context.html" title="ssl::context">ssl::context</a>, <a class="link" href="../reference/ssl__host_name_verification.html" title="ssl::host_name_verification">ssl::host_name_verification</a>,
+        <a class="link" href="../reference/ssl__stream.html" title="ssl::stream">ssl::stream</a>, <a class="link" href="../examples/cpp03_examples.html#asio.examples.cpp03_examples.ssl">SSL
+        example (C++03)</a>, <a class="link" href="../examples/cpp11_examples.html#asio.examples.cpp11_examples.ssl">SSL
+        example (C++11)</a>.
+      </p>
+<h5>
+<a name="asio.overview.ssl.h3"></a>
+        <span><a name="asio.overview.ssl.notes"></a></span><a class="link" href="ssl.html#asio.overview.ssl.notes">Notes</a>
+      </h5>
+<p>
+        <a href="http://www.openssl.org" target="_top">OpenSSL</a> is required to make use
+        of Asio's SSL support. When an application needs to use OpenSSL functionality
+        that is not wrapped by Asio, the underlying OpenSSL types may be obtained
+        by calling <a class="link" href="../reference/ssl__context/native_handle.html" title="ssl::context::native_handle"><code class="computeroutput">ssl::context::native_handle()</code></a>
+        or <a class="link" href="../reference/ssl__stream/native_handle.html" title="ssl::stream::native_handle"><code class="computeroutput">ssl::stream::native_handle()</code></a>.
+      </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="windows/object_handle.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="cpp2011.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/timers.html

@@ -0,0 +1,87 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Timers</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../overview.html" title="Overview">
+<link rel="prev" href="networking/bsd_sockets.html" title="The BSD Socket API and Asio">
+<link rel="next" href="serial_ports.html" title="Serial Ports">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="networking/bsd_sockets.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="serial_ports.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.overview.timers"></a><a class="link" href="timers.html" title="Timers">Timers</a>
+</h3></div></div></div>
+<p>
+        Long running I/O operations will often have a deadline by which they must
+        have completed. These deadlines may be expressed as absolute times, but are
+        often calculated relative to the current time.
+      </p>
+<p>
+        As a simple example, to perform a synchronous wait operation on a timer using
+        a relative time one may write:
+      </p>
+<pre class="programlisting">io_context i;
+...
+deadline_timer t(i);
+t.expires_from_now(boost::posix_time::seconds(5));
+t.wait();
+</pre>
+<p>
+        More commonly, a program will perform an asynchronous wait operation on a
+        timer:
+      </p>
+<pre class="programlisting">void handler(asio::error_code ec) { ... }
+...
+io_context i;
+...
+deadline_timer t(i);
+t.expires_from_now(boost::posix_time::milliseconds(400));
+t.async_wait(handler);
+...
+i.run();
+</pre>
+<p>
+        The deadline associated with a timer may also be obtained as a relative time:
+      </p>
+<pre class="programlisting">boost::posix_time::time_duration time_until_expiry
+  = t.expires_from_now();
+</pre>
+<p>
+        or as an absolute time to allow composition of timers:
+      </p>
+<pre class="programlisting">deadline_timer t2(i);
+t2.expires_at(t.expires_at() + boost::posix_time::seconds(30));
+</pre>
+<h5>
+<a name="asio.overview.timers.h0"></a>
+        <span><a name="asio.overview.timers.see_also"></a></span><a class="link" href="timers.html#asio.overview.timers.see_also">See
+        Also</a>
+      </h5>
+<p>
+        <a class="link" href="../reference/basic_deadline_timer.html" title="basic_deadline_timer">basic_deadline_timer</a>,
+        <a class="link" href="../reference/deadline_timer.html" title="deadline_timer">deadline_timer</a>, <a class="link" href="../tutorial/tuttimer1.html" title="Timer.1 - Using a timer synchronously">timer tutorials</a>.
+      </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="networking/bsd_sockets.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="serial_ports.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/windows.html

@@ -0,0 +1,47 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Windows-Specific Functionality</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../overview.html" title="Overview">
+<link rel="prev" href="posix/fork.html" title="Fork">
+<link rel="next" href="windows/stream_handle.html" title="Stream-Oriented HANDLEs">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="posix/fork.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="windows/stream_handle.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.overview.windows"></a><a class="link" href="windows.html" title="Windows-Specific Functionality">Windows-Specific Functionality</a>
+</h3></div></div></div>
+<p>
+        <a class="link" href="windows/stream_handle.html" title="Stream-Oriented HANDLEs">Stream-Oriented HANDLEs</a>
+      </p>
+<p>
+        <a class="link" href="windows/random_access_handle.html" title="Random-Access HANDLEs">Random-Access
+        HANDLEs</a>
+      </p>
+<p>
+        <a class="link" href="windows/object_handle.html" title="Object HANDLEs">Object HANDLEs</a>
+      </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="posix/fork.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="windows/stream_handle.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/windows/object_handle.html

@@ -0,0 +1,95 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Object HANDLEs</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../windows.html" title="Windows-Specific Functionality">
+<link rel="prev" href="random_access_handle.html" title="Random-Access HANDLEs">
+<link rel="next" href="../ssl.html" title="SSL">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="random_access_handle.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../windows.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="../ssl.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.windows.object_handle"></a><a class="link" href="object_handle.html" title="Object HANDLEs">Object HANDLEs</a>
+</h4></div></div></div>
+<p>
+          Asio provides Windows-specific classes that permit asynchronous wait operations
+          to be performed on HANDLEs to kernel objects of the following types:
+        </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+              Change notification
+            </li>
+<li class="listitem">
+              Console input
+            </li>
+<li class="listitem">
+              Event
+            </li>
+<li class="listitem">
+              Memory resource notification
+            </li>
+<li class="listitem">
+              Process
+            </li>
+<li class="listitem">
+              Semaphore
+            </li>
+<li class="listitem">
+              Thread
+            </li>
+<li class="listitem">
+              Waitable timer
+            </li>
+</ul></div>
+<p>
+          For example, to perform asynchronous operations on an event, the following
+          object may be created:
+        </p>
+<pre class="programlisting">HANDLE handle = ::CreateEvent(...);
+windows::object_handle file(my_io_context, handle);
+</pre>
+<p>
+          The <code class="computeroutput">wait()</code> and <code class="computeroutput">async_wait()</code> member functions
+          may then be used to wait until the kernel object is signalled.
+        </p>
+<h6>
+<a name="asio.overview.windows.object_handle.h0"></a>
+          <span><a name="asio.overview.windows.object_handle.see_also"></a></span><a class="link" href="object_handle.html#asio.overview.windows.object_handle.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/windows__object_handle.html" title="windows::object_handle">windows::object_handle</a>.
+        </p>
+<h6>
+<a name="asio.overview.windows.object_handle.h1"></a>
+          <span><a name="asio.overview.windows.object_handle.notes"></a></span><a class="link" href="object_handle.html#asio.overview.windows.object_handle.notes">Notes</a>
+        </h6>
+<p>
+          Windows object <code class="computeroutput">HANDLE</code>s are only available at compile time
+          when targeting Windows. Programs may test for the macro <code class="computeroutput">ASIO_HAS_WINDOWS_OBJECT_HANDLE</code>
+          to determine whether they are supported.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="random_access_handle.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../windows.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="../ssl.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/windows/random_access_handle.html

@@ -0,0 +1,76 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Random-Access HANDLEs</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../windows.html" title="Windows-Specific Functionality">
+<link rel="prev" href="stream_handle.html" title="Stream-Oriented HANDLEs">
+<link rel="next" href="object_handle.html" title="Object HANDLEs">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="stream_handle.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../windows.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="object_handle.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.windows.random_access_handle"></a><a class="link" href="random_access_handle.html" title="Random-Access HANDLEs">Random-Access
+        HANDLEs</a>
+</h4></div></div></div>
+<p>
+          Asio provides Windows-specific classes that permit asynchronous read and
+          write operations to be performed on HANDLEs that refer to regular files.
+        </p>
+<p>
+          For example, to perform asynchronous operations on a file the following
+          object may be created:
+        </p>
+<pre class="programlisting">HANDLE handle = ::CreateFile(...);
+windows::random_access_handle file(my_io_context, handle);
+</pre>
+<p>
+          Data may be read from or written to the handle using one of the <code class="computeroutput">read_some_at()</code>,
+          <code class="computeroutput">async_read_some_at()</code>, <code class="computeroutput">write_some_at()</code> or <code class="computeroutput">async_write_some_at()</code>
+          member functions. However, like the equivalent functions (<code class="computeroutput">read_some()</code>,
+          etc.) on streams, these functions are only required to transfer one or
+          more bytes in a single operation. Therefore free functions called <a class="link" href="../../reference/read_at.html" title="read_at">read_at()</a>, <a class="link" href="../../reference/async_read_at.html" title="async_read_at">async_read_at()</a>,
+          <a class="link" href="../../reference/write_at.html" title="write_at">write_at()</a> and <a class="link" href="../../reference/async_write_at.html" title="async_write_at">async_write_at()</a>
+          have been created to repeatedly call the corresponding <code class="literal"><span class="bold"><strong>*</strong></span>_some_at()</code> function until all data has
+          been transferred.
+        </p>
+<h6>
+<a name="asio.overview.windows.random_access_handle.h0"></a>
+          <span><a name="asio.overview.windows.random_access_handle.see_also"></a></span><a class="link" href="random_access_handle.html#asio.overview.windows.random_access_handle.see_also">See Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/windows__random_access_handle.html" title="windows::random_access_handle">windows::random_access_handle</a>.
+        </p>
+<h6>
+<a name="asio.overview.windows.random_access_handle.h1"></a>
+          <span><a name="asio.overview.windows.random_access_handle.notes"></a></span><a class="link" href="random_access_handle.html#asio.overview.windows.random_access_handle.notes">Notes</a>
+        </h6>
+<p>
+          Windows random-access <code class="computeroutput">HANDLE</code>s are only available at compile
+          time when targeting Windows and only when the I/O completion port backend
+          is used (which is the default). A program may test for the macro <code class="computeroutput">ASIO_HAS_WINDOWS_RANDOM_ACCESS_HANDLE</code>
+          to determine whether they are supported.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="stream_handle.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../windows.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="object_handle.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/overview/windows/stream_handle.html

@@ -0,0 +1,79 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Stream-Oriented HANDLEs</title>
+<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../../index.html" title="Asio">
+<link rel="up" href="../windows.html" title="Windows-Specific Functionality">
+<link rel="prev" href="../windows.html" title="Windows-Specific Functionality">
+<link rel="next" href="random_access_handle.html" title="Random-Access HANDLEs">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../windows.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../windows.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="random_access_handle.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="asio.overview.windows.stream_handle"></a><a class="link" href="stream_handle.html" title="Stream-Oriented HANDLEs">Stream-Oriented
+        HANDLEs</a>
+</h4></div></div></div>
+<p>
+          Asio contains classes to allow asynchronous read and write operations to
+          be performed on Windows <code class="computeroutput">HANDLE</code>s, such as named pipes.
+        </p>
+<p>
+          For example, to perform asynchronous operations on a named pipe, the following
+          object may be created:
+        </p>
+<pre class="programlisting">HANDLE handle = ::CreateFile(...);
+windows::stream_handle pipe(my_io_context, handle);
+</pre>
+<p>
+          These are then used as synchronous or asynchronous read and write streams.
+          This means the objects can be used with any of the <a class="link" href="../../reference/read.html" title="read">read()</a>,
+          <a class="link" href="../../reference/async_read.html" title="async_read">async_read()</a>, <a class="link" href="../../reference/write.html" title="write">write()</a>,
+          <a class="link" href="../../reference/async_write.html" title="async_write">async_write()</a>, <a class="link" href="../../reference/read_until.html" title="read_until">read_until()</a> or <a class="link" href="../../reference/async_read_until.html" title="async_read_until">async_read_until()</a>
+          free functions.
+        </p>
+<p>
+          The kernel object referred to by the <code class="computeroutput">HANDLE</code> must support use
+          with I/O completion ports (which means that named pipes are supported,
+          but anonymous pipes and console streams are not).
+        </p>
+<h6>
+<a name="asio.overview.windows.stream_handle.h0"></a>
+          <span><a name="asio.overview.windows.stream_handle.see_also"></a></span><a class="link" href="stream_handle.html#asio.overview.windows.stream_handle.see_also">See
+          Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/windows__stream_handle.html" title="windows::stream_handle">windows::stream_handle</a>.
+        </p>
+<h6>
+<a name="asio.overview.windows.stream_handle.h1"></a>
+          <span><a name="asio.overview.windows.stream_handle.notes"></a></span><a class="link" href="stream_handle.html#asio.overview.windows.stream_handle.notes">Notes</a>
+        </h6>
+<p>
+          Windows stream <code class="computeroutput">HANDLE</code>s are only available at compile time
+          when targeting Windows and only when the I/O completion port backend is
+          used (which is the default). A program may test for the macro <code class="computeroutput">ASIO_HAS_WINDOWS_STREAM_HANDLE</code>
+          to determine whether they are supported.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../windows.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../windows.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="random_access_handle.html"><img src="../../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference.html

@@ -0,0 +1,788 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Reference</title>
+<link rel="stylesheet" href="../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../index.html" title="Asio">
+<link rel="up" href="../index.html" title="Asio">
+<link rel="prev" href="examples/cpp17_examples.html" title="C++17 Examples">
+<link rel="next" href="reference/asynchronous_operations.html" title="Requirements on asynchronous operations">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="examples/cpp17_examples.html"><img src="../prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../home.png" alt="Home"></a><a accesskey="n" href="reference/asynchronous_operations.html"><img src="../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="asio.reference"></a><a class="link" href="reference.html" title="Reference">Reference</a>
+</h2></div></div></div>
+<div class="informaltable">
+<table class="table">
+<colgroup>
+<col>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th valign="center">
+          <h3>
+<a name="idm424582793728"></a>Properties</h3>
+        </th>
+<th colspan="3" valign="center">
+          <h3>
+<a name="idm424582792032"></a>Execution</h3>
+        </th>
+</tr></thead>
+<tbody><tr>
+<td valign="top">
+          <h4>
+<a name="idm424582790016"></a>Customisation Points</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/prefer.html" title="prefer">prefer</a></td></tr>
+<tr><td><a class="link" href="reference/query.html" title="query">query</a></td></tr>
+<tr><td><a class="link" href="reference/require.html" title="require">require</a></td></tr>
+<tr><td><a class="link" href="reference/require_concept.html" title="require_concept">require_concept</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582784432"></a>Traits</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/can_prefer.html" title="can_prefer">can_prefer</a></td></tr>
+<tr><td><a class="link" href="reference/can_query.html" title="can_query">can_query</a></td></tr>
+<tr><td><a class="link" href="reference/can_require.html" title="can_require">can_require</a></td></tr>
+<tr><td><a class="link" href="reference/can_require_concept.html" title="can_require_concept">can_require_concept</a></td></tr>
+<tr><td><a class="link" href="reference/is_nothrow_prefer.html" title="is_nothrow_prefer">is_nothrow_prefer</a></td></tr>
+<tr><td><a class="link" href="reference/is_nothrow_query.html" title="is_nothrow_query">is_nothrow_query</a></td></tr>
+<tr><td><a class="link" href="reference/is_nothrow_require.html" title="is_nothrow_require">is_nothrow_require</a></td></tr>
+<tr><td><a class="link" href="reference/is_nothrow_require_concept.html" title="is_nothrow_require_concept">is_nothrow_require_concept</a></td></tr>
+<tr><td><a class="link" href="reference/prefer_result.html" title="prefer_result">prefer_result</a></td></tr>
+<tr><td><a class="link" href="reference/query_result.html" title="query_result">query_result</a></td></tr>
+<tr><td><a class="link" href="reference/require_result.html" title="require_result">require_result</a></td></tr>
+<tr><td><a class="link" href="reference/require_concept_result.html" title="require_concept_result">require_concept_result</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582769840"></a>Class Templates</h4>
+          <table border="0" summary="Simple list" class="simplelist"><tr><td><a class="link" href="reference/execution__any_executor.html" title="execution::any_executor">execution::any_executor</a></td></tr></table>
+          <h4>
+<a name="idm424582767264"></a>Classes</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/execution__bad_executor.html" title="execution::bad_executor">execution::bad_executor</a></td></tr>
+<tr><td><a class="link" href="reference/execution__invocable_archetype.html" title="execution::invocable_archetype">execution::invocable_archetype</a></td></tr>
+<tr><td><a class="link" href="reference/execution__receiver_invocation_error.html" title="execution::receiver_invocation_error">execution::receiver_invocation_error</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582762448"></a>Properties</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/execution__allocator_t.html" title="execution::allocator_t">execution::allocator_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking_t.html" title="execution::blocking_t">execution::blocking_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking_t__possibly_t.html" title="execution::blocking_t::possibly_t">execution::blocking_t::possibly_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking_t__always_t.html" title="execution::blocking_t::always_t">execution::blocking_t::always_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking_t__never_t.html" title="execution::blocking_t::never_t">execution::blocking_t::never_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking_adaptation_t.html" title="execution::blocking_adaptation_t">execution::blocking_adaptation_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking_adaptation_t__disallowed_t.html" title="execution::blocking_adaptation_t::disallowed_t">execution::blocking_adaptation_t::disallowed_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking_adaptation_t__allowed_t.html" title="execution::blocking_adaptation_t::allowed_t">execution::blocking_adaptation_t::allowed_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__bulk_guarantee_t.html" title="execution::bulk_guarantee_t">execution::bulk_guarantee_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__bulk_guarantee_t__unsequenced_t.html" title="execution::bulk_guarantee_t::unsequenced_t">execution::bulk_guarantee_t::unsequenced_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__bulk_guarantee_t__sequenced_t.html" title="execution::bulk_guarantee_t::sequenced_t">execution::bulk_guarantee_t::sequenced_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__bulk_guarantee_t__parallel_t.html" title="execution::bulk_guarantee_t::parallel_t">execution::bulk_guarantee_t::parallel_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__context_t.html" title="execution::context_t">execution::context_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__context_as_t.html" title="execution::context_as_t">execution::context_as_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__mapping_t.html" title="execution::mapping_t">execution::mapping_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__mapping_t__thread_t.html" title="execution::mapping_t::thread_t">execution::mapping_t::thread_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__mapping_t__new_thread_t.html" title="execution::mapping_t::new_thread_t">execution::mapping_t::new_thread_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__mapping_t__other_t.html" title="execution::mapping_t::other_t">execution::mapping_t::other_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__occupancy_t.html" title="execution::occupancy_t">execution::occupancy_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__outstanding_work_t.html" title="execution::outstanding_work_t">execution::outstanding_work_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__outstanding_work_t__untracked_t.html" title="execution::outstanding_work_t::untracked_t">execution::outstanding_work_t::untracked_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__outstanding_work_t__tracked_t.html" title="execution::outstanding_work_t::tracked_t">execution::outstanding_work_t::tracked_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__prefer_only.html" title="execution::prefer_only">execution::prefer_only</a></td></tr>
+<tr><td><a class="link" href="reference/execution__relationship_t.html" title="execution::relationship_t">execution::relationship_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__relationship_t__fork_t.html" title="execution::relationship_t::fork_t">execution::relationship_t::fork_t</a></td></tr>
+<tr><td><a class="link" href="reference/execution__relationship_t__continuation_t.html" title="execution::relationship_t::continuation_t">execution::relationship_t::continuation_t</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582731952"></a>Customisation Points</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/execution__bulk_execute.html" title="execution::bulk_execute">execution::bulk_execute</a></td></tr>
+<tr><td><a class="link" href="reference/execution__connect.html" title="execution::connect">execution::connect</a></td></tr>
+<tr><td><a class="link" href="reference/execution__execute.html" title="execution::execute">execution::execute</a></td></tr>
+<tr><td><a class="link" href="reference/execution__schedule.html" title="execution::schedule">execution::schedule</a></td></tr>
+<tr><td><a class="link" href="reference/execution__set_done.html" title="execution::set_done">execution::set_done</a></td></tr>
+<tr><td><a class="link" href="reference/execution__set_error.html" title="execution::set_error">execution::set_error</a></td></tr>
+<tr><td><a class="link" href="reference/execution__set_value.html" title="execution::set_value">execution::set_value</a></td></tr>
+<tr><td><a class="link" href="reference/execution__start.html" title="execution::start">execution::start</a></td></tr>
+<tr><td><a class="link" href="reference/execution__submit.html" title="execution::submit">execution::submit</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582720784"></a>Property Objects</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/execution__allocator.html" title="execution::allocator">execution::allocator</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking.html" title="execution::blocking">execution::blocking</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking_t/possibly.html" title="execution::blocking_t::possibly">execution::blocking.possibly</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking_t/always.html" title="execution::blocking_t::always">execution::blocking.always</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking_t/never.html" title="execution::blocking_t::never">execution::blocking.never</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking_adaptation.html" title="execution::blocking_adaptation">execution::blocking_adaptation</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking_adaptation_t/disallowed.html" title="execution::blocking_adaptation_t::disallowed">execution::blocking_adaptation.disallowed</a></td></tr>
+<tr><td><a class="link" href="reference/execution__blocking_adaptation_t/allowed.html" title="execution::blocking_adaptation_t::allowed">execution::blocking_adaptation.allowed</a></td></tr>
+<tr><td><a class="link" href="reference/execution__bulk_guarantee.html" title="execution::bulk_guarantee">execution::bulk_guarantee</a></td></tr>
+<tr><td><a class="link" href="reference/execution__bulk_guarantee_t/unsequenced.html" title="execution::bulk_guarantee_t::unsequenced">execution::bulk_guarantee.unsequenced</a></td></tr>
+<tr><td><a class="link" href="reference/execution__bulk_guarantee_t/sequenced.html" title="execution::bulk_guarantee_t::sequenced">execution::bulk_guarantee.sequenced</a></td></tr>
+<tr><td><a class="link" href="reference/execution__bulk_guarantee_t/parallel.html" title="execution::bulk_guarantee_t::parallel">execution::bulk_guarantee.parallel</a></td></tr>
+<tr><td><a class="link" href="reference/execution__context.html" title="execution::context">execution::context</a></td></tr>
+<tr><td><a class="link" href="reference/execution__context_as.html" title="execution::context_as">execution::context_as</a></td></tr>
+<tr><td><a class="link" href="reference/execution__mapping.html" title="execution::mapping">execution::mapping</a></td></tr>
+<tr><td><a class="link" href="reference/execution__mapping_t/thread.html" title="execution::mapping_t::thread">execution::mapping.thread</a></td></tr>
+<tr><td><a class="link" href="reference/execution__mapping_t/new_thread.html" title="execution::mapping_t::new_thread">execution::mapping.new_thread</a></td></tr>
+<tr><td><a class="link" href="reference/execution__mapping_t/other.html" title="execution::mapping_t::other">execution::mapping.other</a></td></tr>
+<tr><td><a class="link" href="reference/execution__occupancy.html" title="execution::occupancy">execution::occupancy</a></td></tr>
+<tr><td><a class="link" href="reference/execution__outstanding_work.html" title="execution::outstanding_work">execution::outstanding_work</a></td></tr>
+<tr><td><a class="link" href="reference/execution__outstanding_work_t/untracked.html" title="execution::outstanding_work_t::untracked">execution::outstanding_work.untracked</a></td></tr>
+<tr><td><a class="link" href="reference/execution__outstanding_work_t/tracked.html" title="execution::outstanding_work_t::tracked">execution::outstanding_work.tracked</a></td></tr>
+<tr><td><a class="link" href="reference/execution__relationship.html" title="execution::relationship">execution::relationship</a></td></tr>
+<tr><td><a class="link" href="reference/execution__relationship_t/fork.html" title="execution::relationship_t::fork">execution::relationship.fork</a></td></tr>
+<tr><td><a class="link" href="reference/execution__relationship_t/continuation.html" title="execution::relationship_t::continuation">execution::relationship.continuation</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582691488"></a>Type Traits</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/execution__can_bulk_execute.html" title="execution::can_bulk_execute">execution::can_bulk_execute</a></td></tr>
+<tr><td><a class="link" href="reference/execution__can_connect.html" title="execution::can_connect">execution::can_connect</a></td></tr>
+<tr><td><a class="link" href="reference/execution__can_execute.html" title="execution::can_execute">execution::can_execute</a></td></tr>
+<tr><td><a class="link" href="reference/execution__can_schedule.html" title="execution::can_schedule">execution::can_schedule</a></td></tr>
+<tr><td><a class="link" href="reference/execution__can_set_done.html" title="execution::can_set_done">execution::can_set_done</a></td></tr>
+<tr><td><a class="link" href="reference/execution__can_set_error.html" title="execution::can_set_error">execution::can_set_error</a></td></tr>
+<tr><td><a class="link" href="reference/execution__can_set_value.html" title="execution::can_set_value">execution::can_set_value</a></td></tr>
+<tr><td><a class="link" href="reference/execution__can_start.html" title="execution::can_start">execution::can_start</a></td></tr>
+<tr><td><a class="link" href="reference/execution__can_submit.html" title="execution::can_submit">execution::can_submit</a></td></tr>
+<tr><td><a class="link" href="reference/execution__connect_result.html" title="execution::connect_result">execution::connect_result</a></td></tr>
+<tr><td><a class="link" href="reference/execution__is_executor.html" title="execution::is_executor">execution::is_executor</a></td></tr>
+<tr><td><a class="link" href="reference/execution__is_executor_of.html" title="execution::is_executor_of">execution::is_executor_of</a></td></tr>
+<tr><td><a class="link" href="reference/execution__is_nothrow_receiver_of.html" title="execution::is_nothrow_receiver_of">execution::is_nothrow_receiver_of</a></td></tr>
+<tr><td><a class="link" href="reference/execution__is_receiver.html" title="execution::is_receiver">execution::is_receiver</a></td></tr>
+<tr><td><a class="link" href="reference/execution__is_receiver_of.html" title="execution::is_receiver_of">execution::is_receiver_of</a></td></tr>
+<tr><td><a class="link" href="reference/execution__is_sender.html" title="execution::is_sender">execution::is_sender</a></td></tr>
+<tr><td><a class="link" href="reference/execution__is_sender_to.html" title="execution::is_sender_to">execution::is_sender_to</a></td></tr>
+<tr><td><a class="link" href="reference/execution__is_typed_sender.html" title="execution::is_typed_sender">execution::is_typed_sender</a></td></tr>
+<tr><td><a class="link" href="reference/execution__sender_traits.html" title="execution::sender_traits">execution::sender_traits</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582669568"></a>Concepts</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/Executor1.html#asio.reference.Executor1.standard_executors">executor</a></td></tr>
+<tr><td><a class="link" href="reference/Executor1.html#asio.reference.Executor1.standard_executors">executor_of</a></td></tr>
+<tr><td><a class="link" href="reference/OperationState.html" title="Operation state concept">operation_state</a></td></tr>
+<tr><td><a class="link" href="reference/Receiver.html" title="Receiver concepts">receiver</a></td></tr>
+<tr><td><a class="link" href="reference/Receiver.html" title="Receiver concepts">receiver_of</a></td></tr>
+<tr><td><a class="link" href="reference/Scheduler.html" title="Scheduler concept">scheduler</a></td></tr>
+<tr><td><a class="link" href="reference/Sender.html" title="Sender concepts">sender</a></td></tr>
+<tr><td><a class="link" href="reference/Sender.html" title="Sender concepts">sender_to</a></td></tr>
+<tr><td><a class="link" href="reference/Sender.html#asio.reference.Sender.typed_sender">typed_sender</a></td></tr>
+</table>
+        </td>
+</tr></tbody>
+</table>
+<table class="table">
+<colgroup>
+<col>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr><th colspan="4" valign="center">
+          <h3>
+<a name="idm424582654800"></a>Core</h3>
+        </th></tr></thead>
+<tbody><tr>
+<td valign="top">
+          <h4>
+<a name="idm424582652784"></a>Classes</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/any_io_executor.html" title="any_io_executor">any_io_executor</a></td></tr>
+<tr><td><a class="link" href="reference/bad_executor.html" title="bad_executor">bad_executor</a></td></tr>
+<tr><td><a class="link" href="reference/coroutine.html" title="coroutine">coroutine</a></td></tr>
+<tr><td><a class="link" href="reference/detached_t.html" title="detached_t">detached_t</a></td></tr>
+<tr><td><a class="link" href="reference/error_code.html" title="error_code">error_code</a></td></tr>
+<tr><td><a class="link" href="reference/execution_context.html" title="execution_context">execution_context</a></td></tr>
+<tr><td><a class="link" href="reference/execution_context__id.html" title="execution_context::id">execution_context::id</a></td></tr>
+<tr><td><a class="link" href="reference/execution_context__service.html" title="execution_context::service">execution_context::service</a></td></tr>
+<tr><td><a class="link" href="reference/executor.html" title="executor">executor</a></td></tr>
+<tr><td><a class="link" href="reference/executor_arg_t.html" title="executor_arg_t">executor_arg_t</a></td></tr>
+<tr><td><a class="link" href="reference/invalid_service_owner.html" title="invalid_service_owner">invalid_service_owner</a></td></tr>
+<tr><td><a class="link" href="reference/io_context.html" title="io_context">io_context</a></td></tr>
+<tr><td><a class="link" href="reference/io_context/executor_type.html" title="io_context::executor_type">io_context::executor_type</a></td></tr>
+<tr><td><a class="link" href="reference/io_context__service.html" title="io_context::service">io_context::service</a></td></tr>
+<tr><td><a class="link" href="reference/io_context__strand.html" title="io_context::strand">io_context::strand</a></td></tr>
+<tr><td>
+<a class="link" href="reference/io_context__work.html" title="io_context::work">io_context::work</a> (deprecated)</td></tr>
+<tr><td><a class="link" href="reference/multiple_exceptions.html" title="multiple_exceptions">multiple_exceptions</a></td></tr>
+<tr><td><a class="link" href="reference/service_already_exists.html" title="service_already_exists">service_already_exists</a></td></tr>
+<tr><td><a class="link" href="reference/static_thread_pool.html" title="static_thread_pool">static_thread_pool</a></td></tr>
+<tr><td><a class="link" href="reference/system_context.html" title="system_context">system_context</a></td></tr>
+<tr><td><a class="link" href="reference/system_error.html" title="system_error">system_error</a></td></tr>
+<tr><td><a class="link" href="reference/system_executor.html" title="system_executor">system_executor</a></td></tr>
+<tr><td><a class="link" href="reference/this_coro__executor_t.html" title="this_coro::executor_t">this_coro::executor_t</a></td></tr>
+<tr><td><a class="link" href="reference/thread.html" title="thread">thread</a></td></tr>
+<tr><td><a class="link" href="reference/thread_pool.html" title="thread_pool">thread_pool</a></td></tr>
+<tr><td><a class="link" href="reference/thread_pool/executor_type.html" title="thread_pool::executor_type">thread_pool::executor_type</a></td></tr>
+<tr><td><a class="link" href="reference/yield_context.html" title="yield_context">yield_context</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582623424"></a>Free Functions</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/execution_context/add_service.html" title="execution_context::add_service">add_service</a></td></tr>
+<tr><td>
+<a class="link" href="reference/asio_handler_allocate.html" title="asio_handler_allocate">asio_handler_allocate</a> (deprecated)</td></tr>
+<tr><td>
+<a class="link" href="reference/asio_handler_deallocate.html" title="asio_handler_deallocate">asio_handler_deallocate</a> (deprecated)</td></tr>
+<tr><td>
+<a class="link" href="reference/asio_handler_invoke.html" title="asio_handler_invoke">asio_handler_invoke</a> (deprecated)</td></tr>
+<tr><td><a class="link" href="reference/asio_handler_is_continuation.html" title="asio_handler_is_continuation">asio_handler_is_continuation</a></td></tr>
+<tr><td><a class="link" href="reference/async_compose.html" title="async_compose">async_compose</a></td></tr>
+<tr><td><a class="link" href="reference/async_initiate.html" title="async_initiate">async_initiate</a></td></tr>
+<tr><td><a class="link" href="reference/bind_executor.html" title="bind_executor">bind_executor</a></td></tr>
+<tr><td><a class="link" href="reference/co_spawn.html" title="co_spawn">co_spawn</a></td></tr>
+<tr><td><a class="link" href="reference/dispatch.html" title="dispatch">dispatch</a></td></tr>
+<tr><td><a class="link" href="reference/defer.html" title="defer">defer</a></td></tr>
+<tr><td><a class="link" href="reference/get_associated_allocator.html" title="get_associated_allocator">get_associated_allocator</a></td></tr>
+<tr><td><a class="link" href="reference/get_associated_executor.html" title="get_associated_executor">get_associated_executor</a></td></tr>
+<tr><td><a class="link" href="reference/execution_context/has_service.html" title="execution_context::has_service">has_service</a></td></tr>
+<tr><td><a class="link" href="reference/make_strand.html" title="make_strand">make_strand</a></td></tr>
+<tr><td><a class="link" href="reference/make_work_guard.html" title="make_work_guard">make_work_guard</a></td></tr>
+<tr><td><a class="link" href="reference/post.html" title="post">post</a></td></tr>
+<tr><td><a class="link" href="reference/redirect_error.html" title="redirect_error">redirect_error</a></td></tr>
+<tr><td><a class="link" href="reference/spawn.html" title="spawn">spawn</a></td></tr>
+<tr><td><a class="link" href="reference/execution_context/use_service.html" title="execution_context::use_service">use_service</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582600800"></a>Class Templates</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/async_completion.html" title="async_completion">async_completion</a></td></tr>
+<tr><td><a class="link" href="reference/awaitable.html" title="awaitable">awaitable</a></td></tr>
+<tr><td><a class="link" href="reference/basic_io_object.html" title="basic_io_object">basic_io_object</a></td></tr>
+<tr><td><a class="link" href="reference/basic_system_executor.html" title="basic_system_executor">basic_system_executor</a></td></tr>
+<tr><td><a class="link" href="reference/basic_yield_context.html" title="basic_yield_context">basic_yield_context</a></td></tr>
+<tr><td><a class="link" href="reference/executor_binder.html" title="executor_binder">executor_binder</a></td></tr>
+<tr><td><a class="link" href="reference/executor_work_guard.html" title="executor_work_guard">executor_work_guard</a></td></tr>
+<tr><td><a class="link" href="reference/io_context__basic_executor_type.html" title="io_context::basic_executor_type">io_context::basic_executor_type</a></td></tr>
+<tr><td><a class="link" href="reference/redirect_error_t.html" title="redirect_error_t">redirect_error_t</a></td></tr>
+<tr><td><a class="link" href="reference/strand.html" title="strand">strand</a></td></tr>
+<tr><td><a class="link" href="reference/thread_pool__basic_executor_type.html" title="thread_pool::basic_executor_type">thread_pool::basic_executor_type</a></td></tr>
+<tr><td><a class="link" href="reference/use_awaitable_t.html" title="use_awaitable_t">use_awaitable_t</a></td></tr>
+<tr><td><a class="link" href="reference/use_future_t.html" title="use_future_t">use_future_t</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582586320"></a>Special Values</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/detached.html" title="detached">detached</a></td></tr>
+<tr><td><a class="link" href="reference/executor_arg.html" title="executor_arg">executor_arg</a></td></tr>
+<tr><td><a class="link" href="reference/this_coro__executor.html" title="this_coro::executor">this_coro::executor</a></td></tr>
+<tr><td><a class="link" href="reference/use_future.html" title="use_future">use_future</a></td></tr>
+<tr><td><a class="link" href="reference/use_awaitable.html" title="use_awaitable">use_awaitable</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582580160"></a>Boost.Bind Placeholders</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/placeholders__bytes_transferred.html" title="placeholders::bytes_transferred">placeholders::bytes_transferred</a></td></tr>
+<tr><td><a class="link" href="reference/placeholders__endpoint.html" title="placeholders::endpoint">placeholders::endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/placeholders__error.html" title="placeholders::error">placeholders::error</a></td></tr>
+<tr><td><a class="link" href="reference/placeholders__iterator.html" title="placeholders::iterator">placeholders::iterator</a></td></tr>
+<tr><td><a class="link" href="reference/placeholders__results.html" title="placeholders::results">placeholders::results</a></td></tr>
+<tr><td><a class="link" href="reference/placeholders__signal_number.html" title="placeholders::signal_number">placeholders::signal_number</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582571568"></a>Error Codes</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/error__basic_errors.html" title="error::basic_errors">error::basic_errors</a></td></tr>
+<tr><td><a class="link" href="reference/error__netdb_errors.html" title="error::netdb_errors">error::netdb_errors</a></td></tr>
+<tr><td><a class="link" href="reference/error__addrinfo_errors.html" title="error::addrinfo_errors">error::addrinfo_errors</a></td></tr>
+<tr><td><a class="link" href="reference/error__misc_errors.html" title="error::misc_errors">error::misc_errors</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582565808"></a>Type Traits</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/associated_allocator.html" title="associated_allocator">associated_allocator</a></td></tr>
+<tr><td><a class="link" href="reference/associated_executor.html" title="associated_executor">associated_executor</a></td></tr>
+<tr><td><a class="link" href="reference/async_result.html" title="async_result">async_result</a></td></tr>
+<tr><td><a class="link" href="reference/default_completion_token.html" title="default_completion_token">default_completion_token</a></td></tr>
+<tr><td><a class="link" href="reference/is_executor.html" title="is_executor">is_executor</a></td></tr>
+<tr><td><a class="link" href="reference/uses_executor.html" title="uses_executor">uses_executor</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582558320"></a>Type Requirements</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/asynchronous_operations.html" title="Requirements on asynchronous operations">Asynchronous operations</a></td></tr>
+<tr><td><a class="link" href="reference/CompletionHandler.html" title="Completion handler requirements">CompletionHandler</a></td></tr>
+<tr><td><a class="link" href="reference/ExecutionContext.html" title="Execution context requirements">ExecutionContext</a></td></tr>
+<tr><td><a class="link" href="reference/Executor1.html" title="Executor requirements">Executor</a></td></tr>
+<tr><td><a class="link" href="reference/Handler.html" title="Handlers">Handler</a></td></tr>
+<tr><td><a class="link" href="reference/Service.html" title="Service requirements">Service</a></td></tr>
+</table>
+        </td>
+</tr></tbody>
+</table>
+<table class="table">
+<colgroup>
+<col>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr><th colspan="4" valign="center">
+          <h3>
+<a name="idm424582546448"></a>Buffers and Buffer-Oriented Operations</h3>
+        </th></tr></thead>
+<tbody><tr>
+<td valign="top">
+          <h4>
+<a name="idm424582544400"></a>Classes</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/const_buffer.html" title="const_buffer">const_buffer</a></td></tr>
+<tr><td><a class="link" href="reference/mutable_buffer.html" title="mutable_buffer">mutable_buffer</a></td></tr>
+<tr><td>
+<a class="link" href="reference/const_buffers_1.html" title="const_buffers_1">const_buffers_1 </a> (deprecated)</td></tr>
+<tr><td>
+<a class="link" href="reference/mutable_buffers_1.html" title="mutable_buffers_1">mutable_buffers_1 </a> (deprecated)</td></tr>
+<tr><td>
+<a class="link" href="reference/null_buffers.html" title="null_buffers">null_buffers</a> (deprecated)</td></tr>
+<tr><td><a class="link" href="reference/streambuf.html" title="streambuf">streambuf</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582536896"></a>Class Templates</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/basic_streambuf.html" title="basic_streambuf">basic_streambuf</a></td></tr>
+<tr><td><a class="link" href="reference/buffered_read_stream.html" title="buffered_read_stream">buffered_read_stream</a></td></tr>
+<tr><td><a class="link" href="reference/buffered_stream.html" title="buffered_stream">buffered_stream</a></td></tr>
+<tr><td><a class="link" href="reference/buffered_write_stream.html" title="buffered_write_stream">buffered_write_stream</a></td></tr>
+<tr><td><a class="link" href="reference/buffers_iterator.html" title="buffers_iterator">buffers_iterator</a></td></tr>
+<tr><td><a class="link" href="reference/dynamic_string_buffer.html" title="dynamic_string_buffer">dynamic_string_buffer</a></td></tr>
+<tr><td><a class="link" href="reference/dynamic_vector_buffer.html" title="dynamic_vector_buffer">dynamic_vector_buffer</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582527472"></a>Free Functions</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/async_read.html" title="async_read">async_read</a></td></tr>
+<tr><td><a class="link" href="reference/async_read_at.html" title="async_read_at">async_read_at</a></td></tr>
+<tr><td><a class="link" href="reference/async_read_until.html" title="async_read_until">async_read_until</a></td></tr>
+<tr><td><a class="link" href="reference/async_write.html" title="async_write">async_write</a></td></tr>
+<tr><td><a class="link" href="reference/async_write_at.html" title="async_write_at">async_write_at</a></td></tr>
+<tr><td><a class="link" href="reference/buffer.html" title="buffer">buffer</a></td></tr>
+<tr><td>
+<a class="link" href="reference/buffer_cast.html" title="buffer_cast">buffer_cast </a> (deprecated)</td></tr>
+<tr><td><a class="link" href="reference/buffer_copy.html" title="buffer_copy">buffer_copy</a></td></tr>
+<tr><td><a class="link" href="reference/buffer_size.html" title="buffer_size">buffer_size</a></td></tr>
+<tr><td><a class="link" href="reference/buffer_sequence_begin.html" title="buffer_sequence_begin">buffer_sequence_begin</a></td></tr>
+<tr><td><a class="link" href="reference/buffer_sequence_end.html" title="buffer_sequence_end">buffer_sequence_end</a></td></tr>
+<tr><td><a class="link" href="reference/buffers_begin.html" title="buffers_begin">buffers_begin</a></td></tr>
+<tr><td><a class="link" href="reference/buffers_end.html" title="buffers_end">buffers_end</a></td></tr>
+<tr><td><a class="link" href="reference/dynamic_buffer.html" title="dynamic_buffer">dynamic_buffer</a></td></tr>
+<tr><td><a class="link" href="reference/read.html" title="read">read</a></td></tr>
+<tr><td><a class="link" href="reference/read_at.html" title="read_at">read_at</a></td></tr>
+<tr><td><a class="link" href="reference/read_until.html" title="read_until">read_until</a></td></tr>
+<tr><td><a class="link" href="reference/transfer_all.html" title="transfer_all">transfer_all</a></td></tr>
+<tr><td><a class="link" href="reference/transfer_at_least.html" title="transfer_at_least">transfer_at_least</a></td></tr>
+<tr><td><a class="link" href="reference/transfer_exactly.html" title="transfer_exactly">transfer_exactly</a></td></tr>
+<tr><td><a class="link" href="reference/write.html" title="write">write</a></td></tr>
+<tr><td><a class="link" href="reference/write_at.html" title="write_at">write_at</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582504224"></a>Type Traits</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/is_const_buffer_sequence.html" title="is_const_buffer_sequence">is_const_buffer_sequence</a></td></tr>
+<tr><td><a class="link" href="reference/is_dynamic_buffer.html" title="is_dynamic_buffer">is_dynamic_buffer</a></td></tr>
+<tr><td><a class="link" href="reference/is_dynamic_buffer_v1.html" title="is_dynamic_buffer_v1">is_dynamic_buffer_v1</a></td></tr>
+<tr><td><a class="link" href="reference/is_dynamic_buffer_v2.html" title="is_dynamic_buffer_v2">is_dynamic_buffer_v2</a></td></tr>
+<tr><td><a class="link" href="reference/is_match_condition.html" title="is_match_condition">is_match_condition</a></td></tr>
+<tr><td><a class="link" href="reference/is_mutable_buffer_sequence.html" title="is_mutable_buffer_sequence">is_mutable_buffer_sequence</a></td></tr>
+<tr><td><a class="link" href="reference/is_read_buffered.html" title="is_read_buffered">is_read_buffered</a></td></tr>
+<tr><td><a class="link" href="reference/is_write_buffered.html" title="is_write_buffered">is_write_buffered</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582493664"></a>Type Requirements</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/read_write_operations.html" title="Requirements on read and write operations">Read and write operations</a></td></tr>
+<tr><td><a class="link" href="reference/AsyncRandomAccessReadDevice.html" title="Buffer-oriented asynchronous random-access read device requirements">AsyncRandomAccessReadDevice</a></td></tr>
+<tr><td><a class="link" href="reference/AsyncRandomAccessWriteDevice.html" title="Buffer-oriented asynchronous random-access write device requirements">AsyncRandomAccessWriteDevice</a></td></tr>
+<tr><td><a class="link" href="reference/AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a></td></tr>
+<tr><td><a class="link" href="reference/AsyncWriteStream.html" title="Buffer-oriented asynchronous write stream requirements">AsyncWriteStream</a></td></tr>
+<tr><td><a class="link" href="reference/CompletionCondition.html" title="Completion condition requirements">CompletionCondition</a></td></tr>
+<tr><td><a class="link" href="reference/ConstBufferSequence.html" title="Constant buffer sequence requirements">ConstBufferSequence</a></td></tr>
+<tr><td><a class="link" href="reference/DynamicBuffer.html" title="Dynamic buffer requirements">DynamicBuffer</a></td></tr>
+<tr><td><a class="link" href="reference/DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">DynamicBuffer_v1</a></td></tr>
+<tr><td><a class="link" href="reference/DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">DynamicBuffer_v2</a></td></tr>
+<tr><td><a class="link" href="reference/MutableBufferSequence.html" title="Mutable buffer sequence requirements">MutableBufferSequence</a></td></tr>
+<tr><td><a class="link" href="reference/ReadHandler.html" title="Read handler requirements">ReadHandler</a></td></tr>
+<tr><td><a class="link" href="reference/SyncRandomAccessReadDevice.html" title="Buffer-oriented synchronous random-access read device requirements">SyncRandomAccessReadDevice</a></td></tr>
+<tr><td><a class="link" href="reference/SyncRandomAccessWriteDevice.html" title="Buffer-oriented synchronous random-access write device requirements">SyncRandomAccessWriteDevice</a></td></tr>
+<tr><td><a class="link" href="reference/SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a></td></tr>
+<tr><td><a class="link" href="reference/SyncWriteStream.html" title="Buffer-oriented synchronous write stream requirements">SyncWriteStream</a></td></tr>
+<tr><td><a class="link" href="reference/WriteHandler.html" title="Write handler requirements">WriteHandler</a></td></tr>
+</table>
+        </td>
+</tr></tbody>
+</table>
+<table class="table">
+<colgroup>
+<col>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr><th colspan="4" valign="center">
+          <h3>
+<a name="idm424582470848"></a>Networking</h3>
+        </th></tr></thead>
+<tbody><tr>
+<td valign="top">
+          <h4>
+<a name="idm424582468832"></a>Classes</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/generic__datagram_protocol.html" title="generic::datagram_protocol">generic::datagram_protocol</a></td></tr>
+<tr><td><a class="link" href="reference/generic__datagram_protocol/endpoint.html" title="generic::datagram_protocol::endpoint">generic::datagram_protocol::endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/generic__datagram_protocol/socket.html" title="generic::datagram_protocol::socket">generic::datagram_protocol::socket</a></td></tr>
+<tr><td><a class="link" href="reference/generic__raw_protocol.html" title="generic::raw_protocol">generic::raw_protocol</a></td></tr>
+<tr><td><a class="link" href="reference/generic__raw_protocol/endpoint.html" title="generic::raw_protocol::endpoint">generic::raw_protocol::endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/generic__raw_protocol/socket.html" title="generic::raw_protocol::socket">generic::raw_protocol::socket</a></td></tr>
+<tr><td><a class="link" href="reference/generic__seq_packet_protocol.html" title="generic::seq_packet_protocol">generic::seq_packet_protocol</a></td></tr>
+<tr><td><a class="link" href="reference/generic__seq_packet_protocol/endpoint.html" title="generic::seq_packet_protocol::endpoint">generic::seq_packet_protocol::endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/generic__seq_packet_protocol/socket.html" title="generic::seq_packet_protocol::socket">generic::seq_packet_protocol::socket</a></td></tr>
+<tr><td><a class="link" href="reference/generic__stream_protocol.html" title="generic::stream_protocol">generic::stream_protocol</a></td></tr>
+<tr><td><a class="link" href="reference/generic__stream_protocol/endpoint.html" title="generic::stream_protocol::endpoint">generic::stream_protocol::endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/generic__stream_protocol/iostream.html" title="generic::stream_protocol::iostream">generic::stream_protocol::iostream</a></td></tr>
+<tr><td><a class="link" href="reference/generic__stream_protocol/socket.html" title="generic::stream_protocol::socket">generic::stream_protocol::socket</a></td></tr>
+<tr><td><a class="link" href="reference/ip__address.html" title="ip::address">ip::address</a></td></tr>
+<tr><td><a class="link" href="reference/ip__address_v4.html" title="ip::address_v4">ip::address_v4</a></td></tr>
+<tr><td><a class="link" href="reference/ip__address_v4_iterator.html" title="ip::address_v4_iterator">ip::address_v4_iterator</a></td></tr>
+<tr><td><a class="link" href="reference/ip__address_v4_range.html" title="ip::address_v4_range">ip::address_v4_range</a></td></tr>
+<tr><td><a class="link" href="reference/ip__address_v6.html" title="ip::address_v6">ip::address_v6</a></td></tr>
+<tr><td><a class="link" href="reference/ip__address_v6_iterator.html" title="ip::address_v6_iterator">ip::address_v6_iterator</a></td></tr>
+<tr><td><a class="link" href="reference/ip__address_v6_range.html" title="ip::address_v6_range">ip::address_v6_range</a></td></tr>
+<tr><td><a class="link" href="reference/ip__bad_address_cast.html" title="ip::bad_address_cast">ip::bad_address_cast</a></td></tr>
+<tr><td><a class="link" href="reference/ip__icmp.html" title="ip::icmp">ip::icmp</a></td></tr>
+<tr><td><a class="link" href="reference/ip__icmp/endpoint.html" title="ip::icmp::endpoint">ip::icmp::endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/ip__icmp/resolver.html" title="ip::icmp::resolver">ip::icmp::resolver</a></td></tr>
+<tr><td><a class="link" href="reference/ip__icmp/socket.html" title="ip::icmp::socket">ip::icmp::socket</a></td></tr>
+<tr><td><a class="link" href="reference/ip__network_v4.html" title="ip::network_v4">ip::network_v4</a></td></tr>
+<tr><td><a class="link" href="reference/ip__network_v6.html" title="ip::network_v6">ip::network_v6</a></td></tr>
+<tr><td><a class="link" href="reference/ip__resolver_base.html" title="ip::resolver_base">ip::resolver_base</a></td></tr>
+<tr><td><a class="link" href="reference/ip__resolver_query_base.html" title="ip::resolver_query_base">ip::resolver_query_base</a></td></tr>
+<tr><td><a class="link" href="reference/ip__tcp.html" title="ip::tcp">ip::tcp</a></td></tr>
+<tr><td><a class="link" href="reference/ip__tcp/acceptor.html" title="ip::tcp::acceptor">ip::tcp::acceptor</a></td></tr>
+<tr><td><a class="link" href="reference/ip__tcp/endpoint.html" title="ip::tcp::endpoint">ip::tcp::endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/ip__tcp/iostream.html" title="ip::tcp::iostream">ip::tcp::iostream</a></td></tr>
+<tr><td><a class="link" href="reference/ip__tcp/resolver.html" title="ip::tcp::resolver">ip::tcp::resolver</a></td></tr>
+<tr><td><a class="link" href="reference/ip__tcp/socket.html" title="ip::tcp::socket">ip::tcp::socket</a></td></tr>
+<tr><td><a class="link" href="reference/ip__udp.html" title="ip::udp">ip::udp</a></td></tr>
+<tr><td><a class="link" href="reference/ip__udp/endpoint.html" title="ip::udp::endpoint">ip::udp::endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/ip__udp/resolver.html" title="ip::udp::resolver">ip::udp::resolver</a></td></tr>
+<tr><td><a class="link" href="reference/ip__udp/socket.html" title="ip::udp::socket">ip::udp::socket</a></td></tr>
+<tr><td><a class="link" href="reference/ip__v4_mapped_t.html" title="ip::v4_mapped_t">ip::v4_mapped_t</a></td></tr>
+<tr><td><a class="link" href="reference/socket_base.html" title="socket_base">socket_base</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582408912"></a>Free Functions</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/async_connect.html" title="async_connect">async_connect</a></td></tr>
+<tr><td><a class="link" href="reference/connect.html" title="connect">connect</a></td></tr>
+<tr><td><a class="link" href="reference/ip__host_name.html" title="ip::host_name">ip::host_name</a></td></tr>
+<tr><td><a class="link" href="reference/ip__address/make_address.html" title="ip::address::make_address">ip::make_address</a></td></tr>
+<tr><td><a class="link" href="reference/ip__address_v4/make_address_v4.html" title="ip::address_v4::make_address_v4">ip::make_address_v4</a></td></tr>
+<tr><td><a class="link" href="reference/ip__address_v6/make_address_v6.html" title="ip::address_v6::make_address_v6">ip::make_address_v6</a></td></tr>
+<tr><td><a class="link" href="reference/ip__network_v4/make_network_v4.html" title="ip::network_v4::make_network_v4">ip::make_network_v4</a></td></tr>
+<tr><td><a class="link" href="reference/ip__network_v6/make_network_v6.html" title="ip::network_v6::make_network_v6">ip::make_network_v6</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582399360"></a>Class Templates</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/basic_datagram_socket.html" title="basic_datagram_socket">basic_datagram_socket</a></td></tr>
+<tr><td><a class="link" href="reference/basic_raw_socket.html" title="basic_raw_socket">basic_raw_socket</a></td></tr>
+<tr><td><a class="link" href="reference/basic_seq_packet_socket.html" title="basic_seq_packet_socket">basic_seq_packet_socket</a></td></tr>
+<tr><td><a class="link" href="reference/basic_socket.html" title="basic_socket">basic_socket</a></td></tr>
+<tr><td><a class="link" href="reference/basic_socket_acceptor.html" title="basic_socket_acceptor">basic_socket_acceptor</a></td></tr>
+<tr><td><a class="link" href="reference/basic_socket_iostream.html" title="basic_socket_iostream">basic_socket_iostream</a></td></tr>
+<tr><td><a class="link" href="reference/basic_socket_streambuf.html" title="basic_socket_streambuf">basic_socket_streambuf</a></td></tr>
+<tr><td><a class="link" href="reference/basic_stream_socket.html" title="basic_stream_socket">basic_stream_socket</a></td></tr>
+<tr><td><a class="link" href="reference/generic__basic_endpoint.html" title="generic::basic_endpoint">generic::basic_endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/ip__basic_endpoint.html" title="ip::basic_endpoint">ip::basic_endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/ip__basic_resolver.html" title="ip::basic_resolver">ip::basic_resolver</a></td></tr>
+<tr><td><a class="link" href="reference/ip__basic_resolver_entry.html" title="ip::basic_resolver_entry">ip::basic_resolver_entry</a></td></tr>
+<tr><td><a class="link" href="reference/ip__basic_resolver_iterator.html" title="ip::basic_resolver_iterator">ip::basic_resolver_iterator</a></td></tr>
+<tr><td><a class="link" href="reference/ip__basic_resolver_results.html" title="ip::basic_resolver_results">ip::basic_resolver_results</a></td></tr>
+<tr><td><a class="link" href="reference/ip__basic_resolver_query.html" title="ip::basic_resolver_query">ip::basic_resolver_query</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582382144"></a>Socket Options</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/ip__multicast__enable_loopback.html" title="ip::multicast::enable_loopback">ip::multicast::enable_loopback</a></td></tr>
+<tr><td><a class="link" href="reference/ip__multicast__hops.html" title="ip::multicast::hops">ip::multicast::hops</a></td></tr>
+<tr><td><a class="link" href="reference/ip__multicast__join_group.html" title="ip::multicast::join_group">ip::multicast::join_group</a></td></tr>
+<tr><td><a class="link" href="reference/ip__multicast__leave_group.html" title="ip::multicast::leave_group">ip::multicast::leave_group</a></td></tr>
+<tr><td><a class="link" href="reference/ip__multicast__outbound_interface.html" title="ip::multicast::outbound_interface">ip::multicast::outbound_interface</a></td></tr>
+<tr><td><a class="link" href="reference/ip__tcp/no_delay.html" title="ip::tcp::no_delay">ip::tcp::no_delay</a></td></tr>
+<tr><td><a class="link" href="reference/ip__unicast__hops.html" title="ip::unicast::hops">ip::unicast::hops</a></td></tr>
+<tr><td><a class="link" href="reference/ip__v6_only.html" title="ip::v6_only">ip::v6_only</a></td></tr>
+<tr><td><a class="link" href="reference/socket_base/broadcast.html" title="socket_base::broadcast">socket_base::broadcast</a></td></tr>
+<tr><td><a class="link" href="reference/socket_base/debug.html" title="socket_base::debug">socket_base::debug</a></td></tr>
+<tr><td><a class="link" href="reference/socket_base/do_not_route.html" title="socket_base::do_not_route">socket_base::do_not_route</a></td></tr>
+<tr><td><a class="link" href="reference/socket_base/enable_connection_aborted.html" title="socket_base::enable_connection_aborted">socket_base::enable_connection_aborted</a></td></tr>
+<tr><td><a class="link" href="reference/socket_base/keep_alive.html" title="socket_base::keep_alive">socket_base::keep_alive</a></td></tr>
+<tr><td><a class="link" href="reference/socket_base/linger.html" title="socket_base::linger">socket_base::linger</a></td></tr>
+<tr><td><a class="link" href="reference/socket_base/receive_buffer_size.html" title="socket_base::receive_buffer_size">socket_base::receive_buffer_size</a></td></tr>
+<tr><td><a class="link" href="reference/socket_base/receive_low_watermark.html" title="socket_base::receive_low_watermark">socket_base::receive_low_watermark</a></td></tr>
+<tr><td><a class="link" href="reference/socket_base/reuse_address.html" title="socket_base::reuse_address">socket_base::reuse_address</a></td></tr>
+<tr><td><a class="link" href="reference/socket_base/send_buffer_size.html" title="socket_base::send_buffer_size">socket_base::send_buffer_size</a></td></tr>
+<tr><td><a class="link" href="reference/socket_base/send_low_watermark.html" title="socket_base::send_low_watermark">socket_base::send_low_watermark</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582359424"></a>I/O Control Commands</h4>
+          <table border="0" summary="Simple list" class="simplelist"><tr><td><a class="link" href="reference/socket_base/bytes_readable.html" title="socket_base::bytes_readable">socket_base::bytes_readable</a></td></tr></table>
+          <h4>
+<a name="idm424582356832"></a>Type Requirements</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/synchronous_socket_operations.html" title="Requirements on synchronous socket operations">Synchronous socket operations</a></td></tr>
+<tr><td><a class="link" href="reference/asynchronous_socket_operations.html" title="Requirements on asynchronous socket operations">Asynchronous socket operations</a></td></tr>
+<tr><td><a class="link" href="reference/AcceptableProtocol.html" title="Acceptable protocol requirements">AcceptableProtocol</a></td></tr>
+<tr><td><a class="link" href="reference/AcceptHandler.html" title="Accept handler requirements">AcceptHandler</a></td></tr>
+<tr><td><a class="link" href="reference/ConnectCondition.html" title="Connect condition requirements">ConnectCondition</a></td></tr>
+<tr><td><a class="link" href="reference/ConnectHandler.html" title="Connect handler requirements">ConnectHandler</a></td></tr>
+<tr><td><a class="link" href="reference/Endpoint.html" title="Endpoint requirements">Endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/EndpointSequence.html" title="Endpoint sequence requirements">EndpointSequence</a></td></tr>
+<tr><td><a class="link" href="reference/GettableSocketOption.html" title="Gettable socket option requirements">GettableSocketOption</a></td></tr>
+<tr><td><a class="link" href="reference/InternetProtocol.html" title="Internet protocol requirements">InternetProtocol</a></td></tr>
+<tr><td><a class="link" href="reference/IoControlCommand.html" title="I/O control command requirements">IoControlCommand</a></td></tr>
+<tr><td><a class="link" href="reference/IteratorConnectHandler.html" title="Iterator connect handler requirements">IteratorConnectHandler</a></td></tr>
+<tr><td><a class="link" href="reference/MoveAcceptHandler.html" title="Move accept handler requirements">MoveAcceptHandler</a></td></tr>
+<tr><td><a class="link" href="reference/Protocol.html" title="Protocol requirements">Protocol</a></td></tr>
+<tr><td><a class="link" href="reference/RangeConnectHandler.html" title="Range connect handler requirements">RangeConnectHandler</a></td></tr>
+<tr><td><a class="link" href="reference/ResolveHandler.html" title="Resolve handler requirements">ResolveHandler</a></td></tr>
+<tr><td><a class="link" href="reference/SettableSocketOption.html" title="Settable socket option requirements">SettableSocketOption</a></td></tr>
+</table>
+        </td>
+</tr></tbody>
+</table>
+<table class="table">
+<colgroup>
+<col>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th valign="center">
+          <h3>
+<a name="idm424582333312"></a>Timers</h3>
+        </th>
+<th valign="center">
+          <h3>
+<a name="idm424582331600"></a>SSL</h3>
+        </th>
+<th valign="center">
+          <h3>
+<a name="idm424582329904"></a>Serial Ports</h3>
+        </th>
+<th valign="center">
+          <h3>
+<a name="idm424582328192"></a>Signal Handling</h3>
+        </th>
+</tr></thead>
+<tbody><tr>
+<td valign="top">
+          <h4>
+<a name="idm424582326176"></a>Classes</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/deadline_timer.html" title="deadline_timer">deadline_timer</a></td></tr>
+<tr><td><a class="link" href="reference/high_resolution_timer.html" title="high_resolution_timer">high_resolution_timer</a></td></tr>
+<tr><td><a class="link" href="reference/steady_timer.html" title="steady_timer">steady_timer</a></td></tr>
+<tr><td><a class="link" href="reference/system_timer.html" title="system_timer">system_timer</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582321072"></a>Class Templates</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/basic_deadline_timer.html" title="basic_deadline_timer">basic_deadline_timer</a></td></tr>
+<tr><td><a class="link" href="reference/basic_waitable_timer.html" title="basic_waitable_timer">basic_waitable_timer</a></td></tr>
+<tr><td><a class="link" href="reference/time_traits_lt__ptime__gt_.html" title="time_traits&lt; boost::posix_time::ptime &gt;">time_traits</a></td></tr>
+<tr><td><a class="link" href="reference/wait_traits.html" title="wait_traits">wait_traits</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582315648"></a>Type Requirements</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/TimeTraits.html" title="Time traits requirements">TimeTraits</a></td></tr>
+<tr><td><a class="link" href="reference/WaitHandler.html" title="Wait handler requirements">WaitHandler</a></td></tr>
+<tr><td><a class="link" href="reference/WaitTraits.html" title="Wait traits requirements">WaitTraits</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582310448"></a>Classes</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/ssl__context.html" title="ssl::context">ssl::context</a></td></tr>
+<tr><td><a class="link" href="reference/ssl__context_base.html" title="ssl::context_base">ssl::context_base</a></td></tr>
+<tr><td><a class="link" href="reference/ssl__host_name_verification.html" title="ssl::host_name_verification">ssl::host_name_verification</a></td></tr>
+<tr><td>
+<a class="link" href="reference/ssl__rfc2818_verification.html" title="ssl::rfc2818_verification">ssl::rfc2818_verification</a> (deprecated)</td></tr>
+<tr><td><a class="link" href="reference/ssl__stream_base.html" title="ssl::stream_base">ssl::stream_base</a></td></tr>
+<tr><td><a class="link" href="reference/ssl__verify_context.html" title="ssl::verify_context">ssl::verify_context</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582302672"></a>Class Templates</h4>
+          <table border="0" summary="Simple list" class="simplelist"><tr><td><a class="link" href="reference/ssl__stream.html" title="ssl::stream">ssl::stream</a></td></tr></table>
+          <h4>
+<a name="idm424582300304"></a>Error Codes</h4>
+          <table border="0" summary="Simple list" class="simplelist"><tr><td><a class="link" href="reference/ssl__error__stream_errors.html" title="ssl::error::stream_errors">ssl::error::stream_errors</a></td></tr></table>
+          <h4>
+<a name="idm424582297712"></a>Type Requirements</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/BufferedHandshakeHandler.html" title="Buffered handshake handler requirements">BufferedHandshakeHandler</a></td></tr>
+<tr><td><a class="link" href="reference/HandshakeHandler.html" title="SSL handshake handler requirements">HandshakeHandler</a></td></tr>
+<tr><td><a class="link" href="reference/ShutdownHandler.html" title="SSL shutdown handler requirements">ShutdownHandler</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582292496"></a>Classes</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/serial_port.html" title="serial_port">serial_port</a></td></tr>
+<tr><td><a class="link" href="reference/serial_port_base.html" title="serial_port_base">serial_port_base</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582289232"></a>Class templates</h4>
+          <table border="0" summary="Simple list" class="simplelist"><tr><td><a class="link" href="reference/basic_serial_port.html" title="basic_serial_port">basic_serial_port</a></td></tr></table>
+          <h4>
+<a name="idm424582286608"></a>Serial Port Options</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/serial_port_base__baud_rate.html" title="serial_port_base::baud_rate">serial_port_base::baud_rate</a></td></tr>
+<tr><td><a class="link" href="reference/serial_port_base__flow_control.html" title="serial_port_base::flow_control">serial_port_base::flow_control</a></td></tr>
+<tr><td><a class="link" href="reference/serial_port_base__parity.html" title="serial_port_base::parity">serial_port_base::parity</a></td></tr>
+<tr><td><a class="link" href="reference/serial_port_base__stop_bits.html" title="serial_port_base::stop_bits">serial_port_base::stop_bits</a></td></tr>
+<tr><td><a class="link" href="reference/serial_port_base__character_size.html" title="serial_port_base::character_size">serial_port_base::character_size</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582280416"></a>Type Requirements</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/GettableSerialPortOption.html" title="Gettable serial port option requirements">GettableSerialPortOption</a></td></tr>
+<tr><td><a class="link" href="reference/SettableSerialPortOption.html" title="Settable serial port option requirements">SettableSerialPortOption</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582276080"></a>Classes</h4>
+          <table border="0" summary="Simple list" class="simplelist"><tr><td><a class="link" href="reference/signal_set.html" title="signal_set">signal_set</a></td></tr></table>
+          <h4>
+<a name="idm424582273712"></a>Class Templates</h4>
+          <table border="0" summary="Simple list" class="simplelist"><tr><td><a class="link" href="reference/basic_signal_set.html" title="basic_signal_set">basic_signal_set</a></td></tr></table>
+          <h4>
+<a name="idm424582271200"></a>Type Requirements</h4>
+          <table border="0" summary="Simple list" class="simplelist"><tr><td><a class="link" href="reference/SignalHandler.html" title="Signal handler requirements">SignalHandler</a></td></tr></table>
+        </td>
+</tr></tbody>
+</table>
+<table class="table">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th colspan="2" valign="center">
+          <h3>
+<a name="idm424582264736"></a>POSIX-specific</h3>
+        </th>
+<th valign="center">
+          <h3>
+<a name="idm424582263024"></a>Windows-specific</h3>
+        </th>
+</tr></thead>
+<tbody><tr>
+<td valign="top">
+          <h4>
+<a name="idm424582260992"></a>Classes</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/local__stream_protocol.html" title="local::stream_protocol">local::stream_protocol</a></td></tr>
+<tr><td><a class="link" href="reference/local__stream_protocol/acceptor.html" title="local::stream_protocol::acceptor">local::stream_protocol::acceptor</a></td></tr>
+<tr><td><a class="link" href="reference/local__stream_protocol/endpoint.html" title="local::stream_protocol::endpoint">local::stream_protocol::endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/local__stream_protocol/iostream.html" title="local::stream_protocol::iostream">local::stream_protocol::iostream</a></td></tr>
+<tr><td><a class="link" href="reference/local__stream_protocol/socket.html" title="local::stream_protocol::socket">local::stream_protocol::socket</a></td></tr>
+<tr><td><a class="link" href="reference/local__datagram_protocol.html" title="local::datagram_protocol">local::datagram_protocol</a></td></tr>
+<tr><td><a class="link" href="reference/local__datagram_protocol/endpoint.html" title="local::datagram_protocol::endpoint">local::datagram_protocol::endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/local__datagram_protocol/socket.html" title="local::datagram_protocol::socket">local::datagram_protocol::socket</a></td></tr>
+<tr><td><a class="link" href="reference/posix__descriptor.html" title="posix::descriptor">posix::descriptor</a></td></tr>
+<tr><td><a class="link" href="reference/posix__descriptor_base.html" title="posix::descriptor_base">posix::descriptor_base</a></td></tr>
+<tr><td><a class="link" href="reference/posix__stream_descriptor.html" title="posix::stream_descriptor">posix::stream_descriptor</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582248048"></a>Free Functions</h4>
+          <table border="0" summary="Simple list" class="simplelist"><tr><td><a class="link" href="reference/local__connect_pair.html" title="local::connect_pair">local::connect_pair</a></td></tr></table>
+          <h4>
+<a name="idm424582245632"></a>Class Templates</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/local__basic_endpoint.html" title="local::basic_endpoint">local::basic_endpoint</a></td></tr>
+<tr><td><a class="link" href="reference/posix__basic_descriptor.html" title="posix::basic_descriptor">posix::basic_descriptor</a></td></tr>
+<tr><td><a class="link" href="reference/posix__basic_stream_descriptor.html" title="posix::basic_stream_descriptor">posix::basic_stream_descriptor</a></td></tr>
+</table>
+        </td>
+<td valign="top">
+          <h4>
+<a name="idm424582240272"></a>Classes</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/windows__object_handle.html" title="windows::object_handle">windows::object_handle</a></td></tr>
+<tr><td><a class="link" href="reference/windows__overlapped_handle.html" title="windows::overlapped_handle">windows::overlapped_handle</a></td></tr>
+<tr><td><a class="link" href="reference/windows__overlapped_ptr.html" title="windows::overlapped_ptr">windows::overlapped_ptr</a></td></tr>
+<tr><td><a class="link" href="reference/windows__random_access_handle.html" title="windows::random_access_handle">windows::random_access_handle</a></td></tr>
+<tr><td><a class="link" href="reference/windows__stream_handle.html" title="windows::stream_handle">windows::stream_handle</a></td></tr>
+</table>
+          <h4>
+<a name="idm424582233776"></a>Class Templates</h4>
+          <table border="0" summary="Simple list" class="simplelist">
+<tr><td><a class="link" href="reference/windows__basic_object_handle.html" title="windows::basic_object_handle">windows::basic_object_handle</a></td></tr>
+<tr><td><a class="link" href="reference/windows__basic_overlapped_handle.html" title="windows::basic_overlapped_handle">windows::basic_overlapped_handle</a></td></tr>
+<tr><td><a class="link" href="reference/windows__basic_random_access_handle.html" title="windows::basic_random_access_handle">windows::basic_random_access_handle</a></td></tr>
+<tr><td><a class="link" href="reference/windows__basic_stream_handle.html" title="windows::basic_stream_handle">windows::basic_stream_handle</a></td></tr>
+</table>
+        </td>
+</tr></tbody>
+</table>
+</div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="examples/cpp17_examples.html"><img src="../prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../home.png" alt="Home"></a><a accesskey="n" href="reference/asynchronous_operations.html"><img src="../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/AcceptHandler.html

@@ -0,0 +1,105 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Accept handler requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="AcceptableProtocol.html" title="Acceptable protocol requirements">
+<link rel="next" href="AsyncRandomAccessReadDevice.html" title="Buffer-oriented asynchronous random-access read device requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="AcceptableProtocol.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="AsyncRandomAccessReadDevice.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.AcceptHandler"></a><a class="link" href="AcceptHandler.html" title="Accept handler requirements">Accept handler requirements</a>
+</h3></div></div></div>
+<p>
+        An accept handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>.
+        A value <code class="computeroutput">h</code> of an accept handler class should work correctly in
+        the expression <code class="computeroutput">h(ec)</code>, where <code class="computeroutput">ec</code> is an lvalue of
+        type <code class="computeroutput">const error_code</code>.
+      </p>
+<h5>
+<a name="asio.reference.AcceptHandler.h0"></a>
+        <span><a name="asio.reference.AcceptHandler.examples"></a></span><a class="link" href="AcceptHandler.html#asio.reference.AcceptHandler.examples">Examples</a>
+      </h5>
+<p>
+        A free function as an accept handler:
+      </p>
+<pre class="programlisting">void accept_handler(
+    const asio::error_code&amp; ec)
+{
+  ...
+}
+</pre>
+<p>
+        An accept handler function object:
+      </p>
+<pre class="programlisting">struct accept_handler
+{
+  ...
+  void operator()(
+      const asio::error_code&amp; ec)
+  {
+    ...
+  }
+  ...
+};
+</pre>
+<p>
+        A lambda as an accept handler:
+      </p>
+<pre class="programlisting">acceptor.async_accept(...,
+    [](const asio::error_code&amp; ec)
+    {
+      ...
+    });
+</pre>
+<p>
+        A non-static class member function adapted to an accept handler using <code class="computeroutput">std::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::accept_handler(
+    const asio::error_code&amp; ec)
+{
+  ...
+}
+...
+acceptor.async_accept(...,
+    std::bind(&amp;my_class::accept_handler,
+      this, std::placeholders::_1));
+</pre>
+<p>
+        A non-static class member function adapted to an accept handler using <code class="computeroutput">boost::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::accept_handler(
+    const asio::error_code&amp; ec)
+{
+  ...
+}
+...
+acceptor.async_accept(...,
+    boost::bind(&amp;my_class::accept_handler,
+      this, asio::placeholders::error));
+</pre>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="AcceptableProtocol.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="AsyncRandomAccessReadDevice.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/AcceptableProtocol.html

@@ -0,0 +1,88 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Acceptable protocol requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="asynchronous_socket_operations.html" title="Requirements on asynchronous socket operations">
+<link rel="next" href="AcceptHandler.html" title="Accept handler requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="asynchronous_socket_operations.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="AcceptHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.AcceptableProtocol"></a><a class="link" href="AcceptableProtocol.html" title="Acceptable protocol requirements">Acceptable protocol
+      requirements</a>
+</h3></div></div></div>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">AcceptableProtocol</code> requirements
+        if it satisfies the requirements of <a class="link" href="Protocol.html" title="Protocol requirements"><code class="computeroutput">Protocol</code></a>
+        as well as the additional requirements listed below.
+      </p>
+<div class="table">
+<a name="asio.reference.AcceptableProtocol.t0"></a><p class="title"><b>Table 1. AcceptableProtocol requirements</b></p>
+<div class="table-contents"><table class="table" summary="AcceptableProtocol requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  return type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody><tr>
+<td>
+                <p>
+                  <code class="computeroutput">X::socket</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  A type that satisfies the requirements of <code class="computeroutput">Destructible</code>
+                  (C++Std [destructible]) and <code class="computeroutput">MoveConstructible</code> (C++Std
+                  [moveconstructible]), and that is publicly and unambiguously derived
+                  from <code class="computeroutput">basic_socket&lt;X&gt;</code>.
+                </p>
+              </td>
+<td>
+              </td>
+</tr></tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="asynchronous_socket_operations.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="AcceptHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/AsyncRandomAccessReadDevice.html

@@ -0,0 +1,128 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Buffer-oriented asynchronous random-access read device requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="AcceptHandler.html" title="Accept handler requirements">
+<link rel="next" href="AsyncRandomAccessWriteDevice.html" title="Buffer-oriented asynchronous random-access write device requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="AcceptHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="AsyncRandomAccessWriteDevice.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.AsyncRandomAccessReadDevice"></a><a class="link" href="AsyncRandomAccessReadDevice.html" title="Buffer-oriented asynchronous random-access read device requirements">Buffer-oriented
+      asynchronous random-access read device requirements</a>
+</h3></div></div></div>
+<p>
+        In the table below, <code class="computeroutput">a</code> denotes an asynchronous random access
+        read device object, <code class="computeroutput">o</code> denotes an offset of type <code class="computeroutput">boost::uint64_t</code>,
+        <code class="computeroutput">mb</code> denotes an object satisfying <a class="link" href="MutableBufferSequence.html" title="Mutable buffer sequence requirements">mutable
+        buffer sequence</a> requirements, and <code class="computeroutput">h</code> denotes an object
+        satisfying <a class="link" href="ReadHandler.html" title="Read handler requirements">read handler</a>
+        requirements.
+      </p>
+<div class="table">
+<a name="asio.reference.AsyncRandomAccessReadDevice.t0"></a><p class="title"><b>Table 2. Buffer-oriented asynchronous random-access read device requirements</b></p>
+<div class="table-contents"><table class="table" summary="Buffer-oriented asynchronous random-access read device requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  operation
+                </p>
+              </th>
+<th>
+                <p>
+                  type
+                </p>
+              </th>
+<th>
+                <p>
+                  semantics, pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.get_executor()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  A type satisfying the <a class="link" href="Executor1.html" title="Executor requirements">Executor
+                  requirements</a>.
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns the associated I/O executor.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.async_read_some_at(o, mb, h);</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">void</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Initiates an asynchronous operation to read one or more bytes of
+                  data from the device <code class="computeroutput">a</code> at the offset <code class="computeroutput">o</code>.
+                  The operation is performed via the <code class="computeroutput">io_service</code> object
+                  <code class="computeroutput">a.get_io_service()</code> and behaves according to <a class="link" href="asynchronous_operations.html" title="Requirements on asynchronous operations">asynchronous operation</a>
+                  requirements.<br> <br> The mutable buffer sequence <code class="computeroutput">mb</code>
+                  specifies memory where the data should be placed. The <code class="computeroutput">async_read_some_at</code>
+                  operation shall always fill a buffer in the sequence completely
+                  before proceeding to the next.<br> <br> The implementation
+                  shall maintain one or more copies of <code class="computeroutput">mb</code> until such
+                  time as the read operation no longer requires access to the memory
+                  specified by the buffers in the sequence. The program must ensure
+                  the memory is valid until:<br> <br> — the last copy of <code class="computeroutput">mb</code>
+                  is destroyed, or<br> <br> — the handler for the asynchronous
+                  read operation is invoked,<br> <br> whichever comes first.<br>
+                  <br> If the total size of all buffers in the sequence <code class="computeroutput">mb</code>
+                  is <code class="computeroutput">0</code>, the asynchronous read operation shall complete
+                  immediately and pass <code class="computeroutput">0</code> as the argument to the handler
+                  that specifies the number of bytes read.
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="AcceptHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="AsyncRandomAccessWriteDevice.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/AsyncRandomAccessWriteDevice.html

@@ -0,0 +1,129 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Buffer-oriented asynchronous random-access write device requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="AsyncRandomAccessReadDevice.html" title="Buffer-oriented asynchronous random-access read device requirements">
+<link rel="next" href="AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="AsyncRandomAccessReadDevice.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="AsyncReadStream.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.AsyncRandomAccessWriteDevice"></a><a class="link" href="AsyncRandomAccessWriteDevice.html" title="Buffer-oriented asynchronous random-access write device requirements">Buffer-oriented
+      asynchronous random-access write device requirements</a>
+</h3></div></div></div>
+<p>
+        In the table below, <code class="computeroutput">a</code> denotes an asynchronous write stream object,
+        <code class="computeroutput">o</code> denotes an offset of type <code class="computeroutput">boost::uint64_t</code>, <code class="computeroutput">cb</code>
+        denotes an object satisfying <a class="link" href="ConstBufferSequence.html" title="Constant buffer sequence requirements">constant
+        buffer sequence</a> requirements, and <code class="computeroutput">h</code> denotes an object
+        satisfying <a class="link" href="WriteHandler.html" title="Write handler requirements">write handler</a>
+        requirements.
+      </p>
+<div class="table">
+<a name="asio.reference.AsyncRandomAccessWriteDevice.t0"></a><p class="title"><b>Table 3. Buffer-oriented asynchronous random-access write device requirements</b></p>
+<div class="table-contents"><table class="table" summary="Buffer-oriented asynchronous random-access write device requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  operation
+                </p>
+              </th>
+<th>
+                <p>
+                  type
+                </p>
+              </th>
+<th>
+                <p>
+                  semantics, pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.get_executor()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  A type satisfying the <a class="link" href="Executor1.html" title="Executor requirements">Executor
+                  requirements</a>.
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns the associated I/O executor.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.async_write_some_at(o, cb, h);</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">void</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Initiates an asynchronous operation to write one or more bytes
+                  of data to the device <code class="computeroutput">a</code> at offset <code class="computeroutput">o</code>.
+                  The operation is performed via the <code class="computeroutput">io_service</code> object
+                  <code class="computeroutput">a.get_io_service()</code> and behaves according to <a class="link" href="asynchronous_operations.html" title="Requirements on asynchronous operations">asynchronous operation</a>
+                  requirements.<br> <br> The constant buffer sequence <code class="computeroutput">cb</code>
+                  specifies memory where the data to be written is located. The
+                  <code class="computeroutput">async_write_some_at</code> operation shall always write a
+                  buffer in the sequence completely before proceeding to the next.<br>
+                  <br> The implementation shall maintain one or more copies of
+                  <code class="computeroutput">cb</code> until such time as the write operation no longer
+                  requires access to the memory specified by the buffers in the sequence.
+                  The program must ensure the memory is valid until:<br> <br>
+                  — the last copy of <code class="computeroutput">cb</code> is destroyed, or<br> <br>
+                  — the handler for the asynchronous write operation is invoked,<br>
+                  <br> whichever comes first.<br> <br> If the total size of
+                  all buffers in the sequence <code class="computeroutput">cb</code> is <code class="computeroutput">0</code>,
+                  the asynchronous write operation shall complete immediately and
+                  pass <code class="computeroutput">0</code> as the argument to the handler that specifies
+                  the number of bytes written.
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="AsyncRandomAccessReadDevice.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="AsyncReadStream.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/AsyncReadStream.html

@@ -0,0 +1,129 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Buffer-oriented asynchronous read stream requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="AsyncRandomAccessWriteDevice.html" title="Buffer-oriented asynchronous random-access write device requirements">
+<link rel="next" href="AsyncWriteStream.html" title="Buffer-oriented asynchronous write stream requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="AsyncRandomAccessWriteDevice.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="AsyncWriteStream.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.AsyncReadStream"></a><a class="link" href="AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">Buffer-oriented asynchronous
+      read stream requirements</a>
+</h3></div></div></div>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">AsyncReadStream</code> requirements
+        if it satisfies the requirements listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">a</code> denotes a value of type <code class="computeroutput">X</code>,
+        <code class="computeroutput">mb</code> denotes a (possibly const) value satisfying the <a class="link" href="MutableBufferSequence.html" title="Mutable buffer sequence requirements"><code class="computeroutput">MutableBufferSequence</code></a>
+        requirements, and <code class="computeroutput">t</code> is a completion token.
+      </p>
+<div class="table">
+<a name="asio.reference.AsyncReadStream.t0"></a><p class="title"><b>Table 4. AsyncReadStream requirements</b></p>
+<div class="table-contents"><table class="table" summary="AsyncReadStream requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  operation
+                </p>
+              </th>
+<th>
+                <p>
+                  type
+                </p>
+              </th>
+<th>
+                <p>
+                  semantics, pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.get_executor()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  A type satisfying the <a class="link" href="Executor1.html" title="Executor requirements">Executor
+                  requirements</a>.
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns the associated I/O executor.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.async_read_some(mb,t)</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  The return type is determined according to the requirements for
+                  an <a class="link" href="asynchronous_operations.html" title="Requirements on asynchronous operations">asynchronous
+                  operation</a>.
+                </p>
+              </td>
+<td>
+                <p>
+                  Meets the requirements for a <a class="link" href="read_write_operations.html" title="Requirements on read and write operations">read
+                  operation</a> and an <a class="link" href="asynchronous_operations.html" title="Requirements on asynchronous operations">asynchronous
+                  operation</a> with completion signature <code class="computeroutput">void(error_code
+                  ec, size_t n)</code>.<br> <br> If <code class="computeroutput">buffer_size(mb) &gt;
+                  0</code>, initiates an asynchronous operation to read one or more
+                  bytes of data from the stream <code class="computeroutput">a</code> into the buffer sequence
+                  <code class="computeroutput">mb</code>. If successful, <code class="computeroutput">ec</code> is set such that
+                  <code class="computeroutput">!ec</code> is <code class="computeroutput">true</code>, and <code class="computeroutput">n</code> is the
+                  number of bytes read. If an error occurred, <code class="computeroutput">ec</code> is
+                  set such that <code class="computeroutput">!!ec</code> is <code class="computeroutput">true</code>, and <code class="computeroutput">n</code>
+                  is 0. If all data has been read from the stream, and the stream
+                  performed an orderly shutdown, <code class="computeroutput">ec</code> is <code class="computeroutput">stream_errc::eof</code>
+                  and <code class="computeroutput">n</code> is 0.<br> <br> If <code class="computeroutput">buffer_size(mb)
+                  == 0</code>, the operation completes immediately. <code class="computeroutput">ec</code>
+                  is set such that <code class="computeroutput">!ec</code> is <code class="computeroutput">true</code>, and <code class="computeroutput">n</code>
+                  is 0.
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="AsyncRandomAccessWriteDevice.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="AsyncWriteStream.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/AsyncWriteStream.html

@@ -0,0 +1,126 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Buffer-oriented asynchronous write stream requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">
+<link rel="next" href="BufferedHandshakeHandler.html" title="Buffered handshake handler requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="AsyncReadStream.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="BufferedHandshakeHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.AsyncWriteStream"></a><a class="link" href="AsyncWriteStream.html" title="Buffer-oriented asynchronous write stream requirements">Buffer-oriented asynchronous
+      write stream requirements</a>
+</h3></div></div></div>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">AsyncWriteStream</code> requirements
+        if it satisfies the requirements listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">a</code> denotes a value of type <code class="computeroutput">X</code>,
+        <code class="computeroutput">cb</code> denotes a (possibly const) value satisfying the <a class="link" href="ConstBufferSequence.html" title="Constant buffer sequence requirements"><code class="computeroutput">ConstBufferSequence</code></a>
+        requirements, and <code class="computeroutput">t</code> is a completion token.
+      </p>
+<div class="table">
+<a name="asio.reference.AsyncWriteStream.t0"></a><p class="title"><b>Table 5. AsyncWriteStream requirements</b></p>
+<div class="table-contents"><table class="table" summary="AsyncWriteStream requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  operation
+                </p>
+              </th>
+<th>
+                <p>
+                  type
+                </p>
+              </th>
+<th>
+                <p>
+                  semantics, pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.get_executor()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  A type satisfying the <a class="link" href="Executor1.html" title="Executor requirements">Executor
+                  requirements</a>.
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns the associated I/O executor.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.async_write_some(cb,t)</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  The return type is determined according to the requirements for
+                  an <a class="link" href="asynchronous_operations.html" title="Requirements on asynchronous operations">asynchronous
+                  operation</a>.
+                </p>
+              </td>
+<td>
+                <p>
+                  Meets the requirements for a <a class="link" href="read_write_operations.html" title="Requirements on read and write operations">write
+                  operation</a> and an <a class="link" href="asynchronous_operations.html" title="Requirements on asynchronous operations">asynchronous
+                  operation</a> with completion signature <code class="computeroutput">void(error_code
+                  ec, size_t n)</code>.<br> <br> If <code class="computeroutput">buffer_size(cb) &gt;
+                  0</code>, initiates an asynchronous operation to write one or more
+                  bytes of data to the stream <code class="computeroutput">a</code> from the buffer sequence
+                  <code class="computeroutput">cb</code>. If successful, <code class="computeroutput">ec</code> is set such that
+                  <code class="computeroutput">!ec</code> is <code class="computeroutput">true</code>, and <code class="computeroutput">n</code> is the
+                  number of bytes written. If an error occurred, <code class="computeroutput">ec</code>
+                  is set such that <code class="computeroutput">!!ec</code> is <code class="computeroutput">true</code>, and <code class="computeroutput">n</code>
+                  is 0.<br> <br> If <code class="computeroutput">buffer_size(cb) == 0</code>, the operation
+                  completes immediately. <code class="computeroutput">ec</code> is set such that <code class="computeroutput">!ec</code>
+                  is <code class="computeroutput">true</code>, and <code class="computeroutput">n</code> is 0.
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="AsyncReadStream.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="BufferedHandshakeHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/BufferedHandshakeHandler.html

@@ -0,0 +1,90 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Buffered handshake handler requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="AsyncWriteStream.html" title="Buffer-oriented asynchronous write stream requirements">
+<link rel="next" href="CompletionCondition.html" title="Completion condition requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="AsyncWriteStream.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="CompletionCondition.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.BufferedHandshakeHandler"></a><a class="link" href="BufferedHandshakeHandler.html" title="Buffered handshake handler requirements">Buffered handshake
+      handler requirements</a>
+</h3></div></div></div>
+<p>
+        A buffered handshake handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>.
+        A value <code class="computeroutput">h</code> of a buffered handshake handler class should work
+        correctly in the expression <code class="computeroutput">h(ec, s)</code>, where <code class="computeroutput">ec</code>
+        is an lvalue of type <code class="computeroutput">const error_code</code> and <code class="computeroutput">s</code> is
+        an lvalue of type <code class="computeroutput">const size_t</code>.
+      </p>
+<h5>
+<a name="asio.reference.BufferedHandshakeHandler.h0"></a>
+        <span><a name="asio.reference.BufferedHandshakeHandler.examples"></a></span><a class="link" href="BufferedHandshakeHandler.html#asio.reference.BufferedHandshakeHandler.examples">Examples</a>
+      </h5>
+<p>
+        A free function as a buffered handshake handler:
+      </p>
+<pre class="programlisting">void handshake_handler(
+    const asio::error_code&amp; ec,
+    std::size_t bytes_transferred)
+{
+  ...
+}
+</pre>
+<p>
+        A buffered handshake handler function object:
+      </p>
+<pre class="programlisting">struct handshake_handler
+{
+  ...
+  void operator()(
+      const asio::error_code&amp; ec,
+      std::size_t bytes_transferred)
+  {
+    ...
+  }
+  ...
+};
+</pre>
+<p>
+        A non-static class member function adapted to a buffered handshake handler
+        using <code class="computeroutput">boost::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::handshake_handler(
+    const asio::error_code&amp; ec,
+    std::size_t bytes_transferred)
+{
+  ...
+}
+...
+socket.async_handshake(...,
+    boost::bind(&amp;my_class::handshake_handler,
+      this, asio::placeholders::error,
+      asio::placeholders::bytes_transferred));
+</pre>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="AsyncWriteStream.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="CompletionCondition.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/CompletionCondition.html

@@ -0,0 +1,106 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Completion condition requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="BufferedHandshakeHandler.html" title="Buffered handshake handler requirements">
+<link rel="next" href="CompletionHandler.html" title="Completion handler requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="BufferedHandshakeHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="CompletionHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.CompletionCondition"></a><a class="link" href="CompletionCondition.html" title="Completion condition requirements">Completion condition
+      requirements</a>
+</h3></div></div></div>
+<p>
+        A <span class="emphasis"><em>completion condition</em></span> is a function object that is
+        used with the algorithms <a class="link" href="read.html" title="read"><code class="computeroutput">read</code></a>,
+        <a class="link" href="async_read.html" title="async_read"><code class="computeroutput">async_read</code></a>,
+        <a class="link" href="write.html" title="write"><code class="computeroutput">write</code></a>, and <a class="link" href="async_write.html" title="async_write"><code class="computeroutput">async_write</code></a> to determine
+        when the algorithm has completed transferring data.
+      </p>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">CompletionCondition</code> requirements
+        if it satisfies the requirements of <code class="computeroutput">Destructible</code> (C++Std [destructible])
+        and <code class="computeroutput">MoveConstructible</code> (C++Std [moveconstructible]), as well
+        as the additional requirements listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">x</code> denotes a value of type <code class="computeroutput">X</code>,
+        <code class="computeroutput">ec</code> denotes a (possibly const) value of type <code class="computeroutput">error_code</code>,
+        and <code class="computeroutput">n</code> denotes a (possibly const) value of type <code class="computeroutput">size_t</code>.
+      </p>
+<div class="table">
+<a name="asio.reference.CompletionCondition.t0"></a><p class="title"><b>Table 6. CompletionCondition requirements</b></p>
+<div class="table-contents"><table class="table" summary="CompletionCondition requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  return type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-condition
+                </p>
+              </th>
+</tr></thead>
+<tbody><tr>
+<td>
+                <p>
+                  <code class="computeroutput">x(ec, n)</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">size_t</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Let <code class="computeroutput">n</code> be the total number of bytes transferred by
+                  the read or write algorithm so far.<br> <br> Returns the maximum
+                  number of bytes to be transferred on the next <code class="computeroutput">read_some</code>,
+                  <code class="computeroutput">async_read_some</code>, <code class="computeroutput">write_some</code>, or <code class="computeroutput">async_write_some</code>
+                  operation performed by the algorithm. Returns <code class="computeroutput">0</code> to
+                  indicate that the algorithm is complete.
+                </p>
+              </td>
+</tr></tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="BufferedHandshakeHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="CompletionHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/CompletionHandler.html

@@ -0,0 +1,99 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Completion handler requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="CompletionCondition.html" title="Completion condition requirements">
+<link rel="next" href="ConnectCondition.html" title="Connect condition requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="CompletionCondition.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="ConnectCondition.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.CompletionHandler"></a><a class="link" href="CompletionHandler.html" title="Completion handler requirements">Completion handler
+      requirements</a>
+</h3></div></div></div>
+<p>
+        A completion handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>.
+        A value <code class="computeroutput">h</code> of a completion handler class should work correctly
+        in the expression <code class="computeroutput">h()</code>.
+      </p>
+<h5>
+<a name="asio.reference.CompletionHandler.h0"></a>
+        <span><a name="asio.reference.CompletionHandler.examples"></a></span><a class="link" href="CompletionHandler.html#asio.reference.CompletionHandler.examples">Examples</a>
+      </h5>
+<p>
+        A free function as a completion handler:
+      </p>
+<pre class="programlisting">void completion_handler()
+{
+  ...
+}
+</pre>
+<p>
+        A completion handler function object:
+      </p>
+<pre class="programlisting">struct completion_handler
+{
+  ...
+  void operator()()
+  {
+    ...
+  }
+  ...
+};
+</pre>
+<p>
+        A lambda as a completion handler:
+      </p>
+<pre class="programlisting">my_io_service.post(
+    []()
+    {
+      ...
+    });
+</pre>
+<p>
+        A non-static class member function adapted to a completion handler using
+        <code class="computeroutput">std::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::completion_handler()
+{
+  ...
+}
+...
+my_io_service.post(std::bind(&amp;my_class::completion_handler, this));
+</pre>
+<p>
+        A non-static class member function adapted to a completion handler using
+        <code class="computeroutput">boost::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::completion_handler()
+{
+  ...
+}
+...
+my_io_service.post(boost::bind(&amp;my_class::completion_handler, this));
+</pre>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="CompletionCondition.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="ConnectCondition.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/ConnectCondition.html

@@ -0,0 +1,99 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Connect condition requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="CompletionHandler.html" title="Completion handler requirements">
+<link rel="next" href="ConnectHandler.html" title="Connect handler requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="CompletionHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="ConnectHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.ConnectCondition"></a><a class="link" href="ConnectCondition.html" title="Connect condition requirements">Connect condition requirements</a>
+</h3></div></div></div>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">ConnectCondition</code> requirements
+        if it satisfies the requirements of <code class="computeroutput">Destructible</code> (C++Std [destructible])
+        and <code class="computeroutput">CopyConstructible</code> (C++Std [copyconstructible]), as well
+        as the additional requirements listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">x</code> denotes a value of type <code class="computeroutput">X</code>,
+        <code class="computeroutput">ec</code> denotes a (possibly const) value of type <code class="computeroutput">error_code</code>,
+        and <code class="computeroutput">ep</code> denotes a (possibly const) value of some type satisfying
+        the <a class="link" href="Endpoint.html" title="Endpoint requirements">endpoint</a> requirements.
+      </p>
+<div class="table">
+<a name="asio.reference.ConnectCondition.t0"></a><p class="title"><b>Table 7. ConnectCondition requirements</b></p>
+<div class="table-contents"><table class="table" summary="ConnectCondition requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  return type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-condition
+                </p>
+              </th>
+</tr></thead>
+<tbody><tr>
+<td>
+                <p>
+                  <code class="computeroutput">x(ec, ep)</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">bool</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns <code class="computeroutput">true</code> to indicate that the <code class="computeroutput">connect</code>
+                  or <code class="computeroutput">async_connect</code> algorithm should attempt a connection
+                  to the endpoint <code class="computeroutput">ep</code>. Otherwise, returns <code class="computeroutput">false</code>
+                  to indicate that the algorithm should not attempt connection to
+                  the endpoint <code class="computeroutput">ep</code>, and should instead skip to the next
+                  endpoint in the sequence.
+                </p>
+              </td>
+</tr></tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="CompletionHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="ConnectHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/ConnectHandler.html

@@ -0,0 +1,105 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Connect handler requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="ConnectCondition.html" title="Connect condition requirements">
+<link rel="next" href="ConstBufferSequence.html" title="Constant buffer sequence requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="ConnectCondition.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="ConstBufferSequence.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.ConnectHandler"></a><a class="link" href="ConnectHandler.html" title="Connect handler requirements">Connect handler requirements</a>
+</h3></div></div></div>
+<p>
+        A connect handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>.
+        A value <code class="computeroutput">h</code> of a connect handler class should work correctly in
+        the expression <code class="computeroutput">h(ec)</code>, where <code class="computeroutput">ec</code> is an lvalue of
+        type <code class="computeroutput">const error_code</code>.
+      </p>
+<h5>
+<a name="asio.reference.ConnectHandler.h0"></a>
+        <span><a name="asio.reference.ConnectHandler.examples"></a></span><a class="link" href="ConnectHandler.html#asio.reference.ConnectHandler.examples">Examples</a>
+      </h5>
+<p>
+        A free function as a connect handler:
+      </p>
+<pre class="programlisting">void connect_handler(
+    const asio::error_code&amp; ec)
+{
+  ...
+}
+</pre>
+<p>
+        A connect handler function object:
+      </p>
+<pre class="programlisting">struct connect_handler
+{
+  ...
+  void operator()(
+      const asio::error_code&amp; ec)
+  {
+    ...
+  }
+  ...
+};
+</pre>
+<p>
+        A lambda as a connect handler:
+      </p>
+<pre class="programlisting">socket.async_connect(...,
+    [](const asio::error_code&amp; ec)
+    {
+      ...
+    });
+</pre>
+<p>
+        A non-static class member function adapted to a connect handler using <code class="computeroutput">std::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::connect_handler(
+    const asio::error_code&amp; ec)
+{
+  ...
+}
+...
+socket.async_connect(...,
+    std::bind(&amp;my_class::connect_handler,
+      this, std::placeholders::_1));
+</pre>
+<p>
+        A non-static class member function adapted to a connect handler using <code class="computeroutput">boost::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::connect_handler(
+    const asio::error_code&amp; ec)
+{
+  ...
+}
+...
+socket.async_connect(...,
+    boost::bind(&amp;my_class::connect_handler,
+      this, asio::placeholders::error));
+</pre>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="ConnectCondition.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="ConstBufferSequence.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/ConstBufferSequence.html

@@ -0,0 +1,130 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Constant buffer sequence requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="ConnectHandler.html" title="Connect handler requirements">
+<link rel="next" href="DynamicBuffer.html" title="Dynamic buffer requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="ConnectHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="DynamicBuffer.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.ConstBufferSequence"></a><a class="link" href="ConstBufferSequence.html" title="Constant buffer sequence requirements">Constant buffer sequence
+      requirements</a>
+</h3></div></div></div>
+<p>
+        A <span class="emphasis"><em>constant buffer sequence</em></span> represents a set of memory
+        regions that may be used as input to an operation, such as the <code class="computeroutput">send</code>
+        operation of a socket.
+      </p>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">ConstBufferSequence</code> requirements
+        if it satisfies the requirements of <code class="computeroutput">Destructible</code> (C++Std [destructible])
+        and <code class="computeroutput">CopyConstructible</code> (C++Std [copyconstructible]), as well
+        as the additional requirements listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">x</code> denotes a (possibly const) value of type
+        <code class="computeroutput">X</code>, and <code class="computeroutput">u</code> denotes an identifier.
+      </p>
+<div class="table">
+<a name="asio.reference.ConstBufferSequence.t0"></a><p class="title"><b>Table 8. ConstBufferSequence requirements</b></p>
+<div class="table-contents"><table class="table" summary="ConstBufferSequence requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  return type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-condition
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">asio::buffer_sequence_begin(x)</code><br> <code class="computeroutput">asio::buffer_sequence_end(x)</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  An iterator type meeting the requirements for bidirectional iterators
+                  (C++Std [bidirectional.iterators]) whose value type is convertible
+                  to <code class="computeroutput">const_buffer</code>.
+                </p>
+              </td>
+<td>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+</p>
+<pre class="programlisting">X u(x);
+</pre>
+<p>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  post:<br>
+</p>
+<pre class="programlisting">equal(
+  asio::buffer_sequence_begin(x),
+  asio::buffer_sequence_end(x),
+  asio::buffer_sequence_begin(u),
+  asio::buffer_sequence_end(u),
+  [](const const_buffer&amp; b1,
+     const const_buffer&amp; b2)
+   {
+     return b1.data() == b2.data()
+         &amp;&amp; b1.size() == b2.size();
+   })
+</pre>
+<p>
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="ConnectHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="DynamicBuffer.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/DynamicBuffer.html

@@ -0,0 +1,50 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Dynamic buffer requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="ConstBufferSequence.html" title="Constant buffer sequence requirements">
+<link rel="next" href="DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="ConstBufferSequence.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="DynamicBuffer_v1.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.DynamicBuffer"></a><a class="link" href="DynamicBuffer.html" title="Dynamic buffer requirements">Dynamic buffer requirements</a>
+</h3></div></div></div>
+<p>
+        See:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <a class="link" href="DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">Dynamic buffer requirements
+            (version 1)</a>
+          </li>
+<li class="listitem">
+            <a class="link" href="DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">Dynamic buffer requirements
+            (version 2)</a>
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="ConstBufferSequence.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="DynamicBuffer_v1.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/DynamicBuffer_v1.html

@@ -0,0 +1,258 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Dynamic buffer requirements (version 1)</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="DynamicBuffer.html" title="Dynamic buffer requirements">
+<link rel="next" href="DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="DynamicBuffer.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="DynamicBuffer_v2.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.DynamicBuffer_v1"></a><a class="link" href="DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">Dynamic buffer requirements
+      (version 1)</a>
+</h3></div></div></div>
+<p>
+        A dynamic buffer encapsulates memory storage that may be automatically resized
+        as required, where the memory is divided into an input sequence followed
+        by an output sequence. These memory regions are internal to the dynamic buffer
+        sequence, but direct access to the elements is provided to permit them to
+        be efficiently used with I/O operations, such as the <code class="computeroutput">send</code> or
+        <code class="computeroutput">receive</code> operations of a socket. Data written to the output sequence
+        of a dynamic buffer sequence object is appended to the input sequence of
+        the same object.
+      </p>
+<p>
+        A dynamic buffer type <code class="computeroutput">X</code> shall satisfy the requirements of <code class="computeroutput">MoveConstructible</code>
+        (C++ Std, [moveconstructible]) types in addition to those listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">X</code> denotes a dynamic buffer class, <code class="computeroutput">x</code>
+        denotes a value of type <code class="computeroutput">X&amp;</code>, <code class="computeroutput">x1</code> denotes values
+        of type <code class="computeroutput">const X&amp;</code>, and <code class="computeroutput">n</code> denotes a value of
+        type <code class="computeroutput">size_t</code>, and <code class="computeroutput">u</code> denotes an identifier.
+      </p>
+<div class="table">
+<a name="asio.reference.DynamicBuffer_v1.t0"></a><p class="title"><b>Table 9. DynamicBuffer_v1 requirements</b></p>
+<div class="table-contents"><table class="table" summary="DynamicBuffer_v1 requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">X::const_buffers_type</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  type meeting <a class="link" href="ConstBufferSequence.html" title="Constant buffer sequence requirements">ConstBufferSequence</a>
+                  requirements.
+                </p>
+              </td>
+<td>
+                <p>
+                  This type represents the memory associated with the input sequence.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">X::mutable_buffers_type</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  type meeting <a class="link" href="MutableBufferSequence.html" title="Mutable buffer sequence requirements">MutableBufferSequence</a>
+                  requirements.
+                </p>
+              </td>
+<td>
+                <p>
+                  This type represents the memory associated with the output sequence.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1.size()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">size_t</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns the size, in bytes, of the input sequence.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1.max_size()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">size_t</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns the permitted maximum of the sum of the sizes of the input
+                  sequence and output sequence.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1.capacity()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">size_t</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns the maximum sum of the sizes of the input sequence and
+                  output sequence that the dynamic buffer can hold without requiring
+                  reallocation.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1.data()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">X::const_buffers_type</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns a constant buffer sequence <code class="computeroutput">u</code> that represents
+                  the memory associated with the input sequence, and where <code class="computeroutput">buffer_size(u)
+                  == size()</code>.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x.prepare(n)</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">X::mutable_buffers_type</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Requires: <code class="computeroutput">size() + n &lt;= max_size()</code>.<br> <br>
+                  Returns a mutable buffer sequence <code class="computeroutput">u</code> representing the
+                  output sequence, and where <code class="computeroutput">buffer_size(u) == n</code>. The
+                  dynamic buffer reallocates memory as required. All constant or
+                  mutable buffer sequences previously obtained using <code class="computeroutput">data()</code>
+                  or <code class="computeroutput">prepare()</code> are invalidated.<br> <br> Throws:
+                  <code class="computeroutput">length_error</code> if <code class="computeroutput">size() + n &gt; max_size()</code>.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x.commit(n)</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Appends <code class="computeroutput">n</code> bytes from the start of the output sequence
+                  to the end of the input sequence. The remainder of the output sequence
+                  is discarded. If <code class="computeroutput">n</code> is greater than the size of the
+                  output sequence, the entire output sequence is appended to the
+                  input sequence. All constant or mutable buffer sequences previously
+                  obtained using <code class="computeroutput">data()</code> or <code class="computeroutput">prepare()</code> are
+                  invalidated.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x.consume(n)</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Removes <code class="computeroutput">n</code> bytes from beginning of the input sequence.
+                  If <code class="computeroutput">n</code> is greater than the size of the input sequence,
+                  the entire input sequence is removed. All constant or mutable buffer
+                  sequences previously obtained using <code class="computeroutput">data()</code> or <code class="computeroutput">prepare()</code>
+                  are invalidated.
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="DynamicBuffer.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="DynamicBuffer_v2.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/DynamicBuffer_v2.html

@@ -0,0 +1,265 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Dynamic buffer requirements (version 2)</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">
+<link rel="next" href="Endpoint.html" title="Endpoint requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="DynamicBuffer_v1.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="Endpoint.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.DynamicBuffer_v2"></a><a class="link" href="DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">Dynamic buffer requirements
+      (version 2)</a>
+</h3></div></div></div>
+<p>
+        A dynamic buffer encapsulates memory storage that may be automatically resized
+        as required.
+      </p>
+<p>
+        A dynamic buffer type <code class="computeroutput">X</code> shall satisfy the requirements of <code class="computeroutput">CopyConstructible</code>
+        (C++ Std, [copyconstructible]) types in addition to those listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">X</code> denotes a dynamic buffer class, <code class="computeroutput">x</code>
+        denotes a value of type <code class="computeroutput">X&amp;</code>, <code class="computeroutput">x1</code> denotes values
+        of type <code class="computeroutput">const X&amp;</code>, <code class="computeroutput">pos</code> and <code class="computeroutput">n</code> denote
+        values of type <code class="computeroutput">size_t</code>, and <code class="computeroutput">u</code> denotes an identifier.
+      </p>
+<div class="table">
+<a name="asio.reference.DynamicBuffer_v2.t0"></a><p class="title"><b>Table 10. DynamicBuffer_v2 requirements</b></p>
+<div class="table-contents"><table class="table" summary="DynamicBuffer_v2 requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">X::const_buffers_type</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  type meeting <a class="link" href="ConstBufferSequence.html" title="Constant buffer sequence requirements">ConstBufferSequence</a>
+                  requirements.
+                </p>
+              </td>
+<td>
+                <p>
+                  This type represents the underlying memory as a sequence of @c
+                  const_buffer objects.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">X::mutable_buffers_type</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  type meeting <a class="link" href="MutableBufferSequence.html" title="Mutable buffer sequence requirements">MutableBufferSequence</a>
+                  requirements.
+                </p>
+              </td>
+<td>
+                <p>
+                  This type represents the underlying memory as a sequence of @c
+                  mutable_buffer objects.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1.size()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">size_t</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns the size, in bytes, of the underlying memory.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1.max_size()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">size_t</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns the permitted maximum size of the underlying memory.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1.capacity()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">size_t</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns the maximum size to which the underlying memory can grow
+                  without requiring reallocation.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1.data(pos, n)</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">X::const_buffers_type</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns a constant buffer sequence <code class="computeroutput">u</code> that represents
+                  the underlying memory beginning at offset <code class="computeroutput">pos</code>, and
+                  where <code class="computeroutput">buffer_size(u) &lt;= n</code>.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x.data(pos, n)</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">X::mutable_buffers_type</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns a mutable buffer sequence <code class="computeroutput">u</code> that represents
+                  the underlying memory beginning at offset <code class="computeroutput">pos</code>, and
+                  where <code class="computeroutput">buffer_size(u) &lt;= n</code>.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x.grow(n)</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Requires: <code class="computeroutput">size() + n &lt;= max_size()</code>.<br> <br>
+                  Extends the underlying memory to accommodate <code class="computeroutput">n</code> additional
+                  bytes at the end. The dynamic buffer reallocates memory as required.
+                  All constant or mutable buffer sequences previously obtained using
+                  <code class="computeroutput">data()</code> are invalidated.<br> <br> Throws: <code class="computeroutput">length_error</code>
+                  if <code class="computeroutput">size() + n &gt; max_size()</code>.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x.shrink(n)</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Removes <code class="computeroutput">n</code> bytes from the end of the underlying memory.
+                  If <code class="computeroutput">n</code> is greater than the size of the underlying memory,
+                  the entire underlying memory is emptied. All constant or mutable
+                  buffer sequences previously obtained using <code class="computeroutput">data()</code>
+                  are invalidated.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x.consume(n)</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Removes <code class="computeroutput">n</code> bytes from the beginning of the underlying
+                  memory. If <code class="computeroutput">n</code> is greater than the size of the underlying
+                  memory, the entire underlying memory is emptied. All constant or
+                  mutable buffer sequences previously obtained using <code class="computeroutput">data()</code>
+                  are invalidated.
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="DynamicBuffer_v1.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="Endpoint.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/Endpoint.html

@@ -0,0 +1,256 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Endpoint requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">
+<link rel="next" href="EndpointSequence.html" title="Endpoint sequence requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="DynamicBuffer_v2.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="EndpointSequence.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.Endpoint"></a><a class="link" href="Endpoint.html" title="Endpoint requirements">Endpoint requirements</a>
+</h3></div></div></div>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">Endpoint</code> requirements if it
+        satisfies the requirements of <code class="computeroutput">Destructible</code> (C++Std [destructible]),
+        <code class="computeroutput">DefaultConstructible</code> (C++Std [defaultconstructible]), <code class="computeroutput">CopyConstructible</code>
+        (C++Std [copyconstructible]), and <code class="computeroutput">CopyAssignable</code> (C++Std [copyassignable]),
+        as well as the additional requirements listed below.
+      </p>
+<p>
+        The default constructor and move operations of the type <code class="computeroutput">X</code> shall
+        not exit via an exception.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">a</code> denotes a (possibly const) value of type
+        <code class="computeroutput">X</code>, and <code class="computeroutput">u</code> denotes an identifier.
+      </p>
+<div class="table">
+<a name="asio.reference.Endpoint.t0"></a><p class="title"><b>Table 11. Endpoint requirements</b></p>
+<div class="table-contents"><table class="table" summary="Endpoint requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">X::protocol_type</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  type meeting <a class="link" href="Protocol.html" title="Protocol requirements"><code class="computeroutput">Protocol</code></a>
+                  requirements
+                </p>
+              </td>
+<td>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.protocol()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">protocol_type</code>
+                </p>
+              </td>
+<td>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break"><p>
+        In the table below, <code class="computeroutput">a</code> denotes a (possibly const) value of type
+        <code class="computeroutput">X</code>, <code class="computeroutput">b</code> denotes a value of type <code class="computeroutput">X</code>, and
+        <code class="computeroutput">s</code> denotes a (possibly const) value of a type that is convertible
+        to <code class="computeroutput">size_t</code> and denotes a size in bytes.
+      </p>
+<div class="table">
+<a name="asio.reference.Endpoint.t1"></a><p class="title"><b>Table 12. Endpoint requirements for extensible implementations</b></p>
+<div class="table-contents"><table class="table" summary="Endpoint requirements for extensible implementations">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.data()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">const void*</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns a pointer suitable for passing as the <span class="emphasis"><em>address</em></span>
+                  argument to functions such as <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/connect.html" target="_top"><code class="computeroutput"><span class="identifier">connect</span><span class="special">()</span></code></a>,
+                  or as the <span class="emphasis"><em>dest_addr</em></span> argument to functions
+                  such as <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/sendto.html" target="_top"><code class="computeroutput"><span class="identifier">sendto</span><span class="special">()</span></code></a>.
+                  The implementation shall perform a <code class="computeroutput">static_cast</code> on
+                  the pointer to convert it to <code class="computeroutput">const sockaddr*</code>.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">b.data()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">void*</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns a pointer suitable for passing as the <span class="emphasis"><em>address</em></span>
+                  argument to functions such as <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/accept.html" target="_top"><code class="computeroutput"><span class="identifier">accept</span><span class="special">()</span></code></a>,
+                  <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/getpeername.html" target="_top"><code class="computeroutput"><span class="identifier">getpeername</span><span class="special">()</span></code></a>,
+                  <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/getsockname.html" target="_top"><code class="computeroutput"><span class="identifier">getsockname</span><span class="special">()</span></code></a>
+                  and <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/recvfrom.html" target="_top"><code class="computeroutput"><span class="identifier">recvfrom</span><span class="special">()</span></code></a>.
+                  The implementation shall perform a <code class="computeroutput">static_cast</code> on
+                  the pointer to convert it to <code class="computeroutput">sockaddr*</code>.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.size()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">size_t</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns a value suitable for passing as the <span class="emphasis"><em>address_len</em></span>
+                  argument to functions such as <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/connect.html" target="_top"><code class="computeroutput"><span class="identifier">connect</span><span class="special">()</span></code></a>,
+                  or as the <span class="emphasis"><em>dest_len</em></span> argument to functions such
+                  as <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/sendto.html" target="_top"><code class="computeroutput"><span class="identifier">sendto</span><span class="special">()</span></code></a>,
+                  after appropriate integer conversion has been performed.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">b.resize(s)</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  pre: <code class="computeroutput">s &gt;= 0</code><br> post: <code class="computeroutput">a.size() == s</code><br>
+                  Passed the value contained in the <span class="emphasis"><em>address_len</em></span>
+                  argument to functions such as <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/accept.html" target="_top"><code class="computeroutput"><span class="identifier">accept</span><span class="special">()</span></code></a>,
+                  <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/getpeername.html" target="_top"><code class="computeroutput"><span class="identifier">getpeername</span><span class="special">()</span></code></a>,
+                  <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/getsockname.html" target="_top"><code class="computeroutput"><span class="identifier">getsockname</span><span class="special">()</span></code></a>
+                  and <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/recvfrom.html" target="_top"><code class="computeroutput"><span class="identifier">recvfrom</span><span class="special">()</span></code></a>,
+                  after successful completion of the function. Permitted to throw
+                  an exception if the protocol associated with the endpoint object
+                  <code class="computeroutput">a</code> does not support the specified size.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.capacity()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">size_t</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns a value suitable for passing as the <span class="emphasis"><em>address_len</em></span>
+                  argument to functions such as <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/accept.html" target="_top"><code class="computeroutput"><span class="identifier">accept</span><span class="special">()</span></code></a>,
+                  <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/getpeername.html" target="_top"><code class="computeroutput"><span class="identifier">getpeername</span><span class="special">()</span></code></a>,
+                  <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/getsockname.html" target="_top"><code class="computeroutput"><span class="identifier">getsockname</span><span class="special">()</span></code></a>
+                  and <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/recvfrom.html" target="_top"><code class="computeroutput"><span class="identifier">recvfrom</span><span class="special">()</span></code></a>,
+                  after appropriate integer conversion has been performed.
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="DynamicBuffer_v2.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="EndpointSequence.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/EndpointSequence.html

@@ -0,0 +1,94 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Endpoint sequence requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="Endpoint.html" title="Endpoint requirements">
+<link rel="next" href="ExecutionContext.html" title="Execution context requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="Endpoint.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="ExecutionContext.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.EndpointSequence"></a><a class="link" href="EndpointSequence.html" title="Endpoint sequence requirements">Endpoint sequence requirements</a>
+</h3></div></div></div>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">EndpointSequence</code> requirements
+        if it satisfies the requirements of <code class="computeroutput">Destructible</code> (C++Std [destructible])
+        and <code class="computeroutput">CopyConstructible</code> (C++Std [copyconstructible]), as well
+        as the additional requirements listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">x</code> denotes a (possibly const) value of type
+        <code class="computeroutput">X</code>.
+      </p>
+<div class="table">
+<a name="asio.reference.EndpointSequence.t0"></a><p class="title"><b>Table 13. EndpointSequence requirements</b></p>
+<div class="table-contents"><table class="table" summary="EndpointSequence requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  return type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-condition
+                </p>
+              </th>
+</tr></thead>
+<tbody><tr>
+<td>
+                <p>
+                  <code class="computeroutput">x.begin()</code><br> <code class="computeroutput">x.end()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  A type meeting the requirements for forward iterators (C++Std [forward.iterators])
+                  whose value type is convertible to a type satisfying the <a class="link" href="Endpoint.html" title="Endpoint requirements"><code class="computeroutput">Endpoint</code></a>
+                  requirements.
+                </p>
+              </td>
+<td>
+                <p>
+                  [<code class="computeroutput">x.begin()</code>,<code class="computeroutput">x.end()</code>) is a valid range.
+                </p>
+              </td>
+</tr></tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="Endpoint.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="ExecutionContext.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/ExecutionContext.html

@@ -0,0 +1,123 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Execution context requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="EndpointSequence.html" title="Endpoint sequence requirements">
+<link rel="next" href="Executor1.html" title="Executor requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="EndpointSequence.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="Executor1.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.ExecutionContext"></a><a class="link" href="ExecutionContext.html" title="Execution context requirements">Execution context requirements</a>
+</h3></div></div></div>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">ExecutionContext</code> requirements
+        if it is publicly and unambiguously derived from <code class="computeroutput">execution_context</code>,
+        and satisfies the additional requirements listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">x</code> denotes a value of type <code class="computeroutput">X</code>.
+      </p>
+<div class="table">
+<a name="asio.reference.ExecutionContext.t0"></a><p class="title"><b>Table 14. ExecutionContext requirements</b></p>
+<div class="table-contents"><table class="table" summary="ExecutionContext requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  return type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-condition
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">X::executor_type</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  type meeting <a class="link" href="Executor1.html" title="Executor requirements"><code class="computeroutput">Executor</code></a>
+                  requirements
+                </p>
+              </td>
+<td>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x.~X()</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Destroys all unexecuted function objects that were submitted via
+                  an executor object that is associated with the execution context.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x.get_executor()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">X::executor_type</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns an executor object that is associated with the execution
+                  context.
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="EndpointSequence.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="Executor1.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/Executor1.html

@@ -0,0 +1,404 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Executor requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="ExecutionContext.html" title="Execution context requirements">
+<link rel="next" href="GettableSerialPortOption.html" title="Gettable serial port option requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="ExecutionContext.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="GettableSerialPortOption.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.Executor1"></a><a class="link" href="Executor1.html" title="Executor requirements">Executor requirements</a>
+</h3></div></div></div>
+<h5>
+<a name="asio.reference.Executor1.h0"></a>
+        <span><a name="asio.reference.Executor1.standard_executors"></a></span><a class="link" href="Executor1.html#asio.reference.Executor1.standard_executors">Standard
+        executors</a>
+      </h5>
+<p>
+        Let <code class="computeroutput">executor-of-impl</code> be the exposition-only concept
+      </p>
+<pre class="programlisting">template&lt;class E, class F&gt;
+  concept executor-of-impl =
+    invocable&lt;decay_t&lt;F&gt;&amp;&gt; &amp;&amp;
+    constructible_from&lt;decay_t&lt;F&gt;, F&gt; &amp;&amp;
+    move_constructible&lt;decay_t&lt;F&gt;&gt; &amp;&amp;
+    copy_constructible&lt;E&gt; &amp;&amp;
+    is_nothrow_copy_constructible_v&lt;E&gt; &amp;&amp;
+    equality_comparable&lt;E&gt; /* nothrow */ &amp;&amp;
+    requires(const E&amp; e, F&amp;&amp; f) {
+      execution::execute(e, (F&amp;&amp;)f);
+    };
+</pre>
+<p>
+        Then the <code class="computeroutput">executor</code> and <code class="computeroutput">executor_of</code> concepts are
+        defined as follows:
+      </p>
+<pre class="programlisting">template&lt;class E&gt;
+  concept executor =
+    executor-of-impl&lt;E, execution::invocable_archetype&gt;;
+
+template&lt;class E, class F&gt;
+  concept executor_of =
+    executor&lt;E&gt; &amp;&amp;
+    executor-of-impl&lt;E, F&gt;;
+</pre>
+<p>
+        Neither an executor's equality comparison nor <code class="computeroutput">swap</code> operation
+        shall exit via an exception.
+      </p>
+<p>
+        None of an executor type's copy constructor, destructor, equality comparison,
+        <code class="computeroutput">swap</code> function, <code class="computeroutput">execute</code> function, or associated
+        <code class="computeroutput">query</code> functions shall introduce data races as a result of concurrent
+        invocations of those functions from different threads.
+      </p>
+<p>
+        For any two (possibly const) values <code class="computeroutput">x1</code> and <code class="computeroutput">x2</code> of
+        some executor type <code class="computeroutput">X</code>, <code class="computeroutput">x1 == x2</code> shall return <code class="computeroutput">true</code>
+        only if <code class="computeroutput">asio::query(x1,p) == asio::query(x2,p)</code> for every property
+        <code class="computeroutput">p</code> where both <code class="computeroutput">asio::query(x1,p)</code> and <code class="computeroutput">asio::query(x2,p)</code>
+        are well-formed and result in a non-void type that is <code class="computeroutput">equality_comparable</code>
+        (C++Std [equalitycomparable]). [<span class="emphasis"><em>Note:</em></span> The above requirements
+        imply that <code class="computeroutput">x1 == x2</code> returns <code class="computeroutput">true</code> if <code class="computeroutput">x1</code>
+        and <code class="computeroutput">x2</code> can be interchanged with identical effects. An executor
+        may conceptually contain additional properties which are not exposed by a
+        named property type that can be observed via <code class="computeroutput">asio::query</code>; in
+        this case, it is up to the concrete executor implementation to decide if
+        these properties affect equality. Returning <code class="computeroutput">false</code> does not necessarily
+        imply that the effects are not identical. —<span class="emphasis"><em>end note</em></span>]
+      </p>
+<p>
+        An executor type's destructor shall not block pending completion of the submitted
+        function objects. [<span class="emphasis"><em>Note:</em></span> The ability to wait for completion
+        of submitted function objects may be provided by the associated execution
+        context. —<span class="emphasis"><em>end note</em></span>]
+      </p>
+<p>
+        In addition to the above requirements, types <code class="computeroutput">E</code> and <code class="computeroutput">F</code>
+        model <code class="computeroutput">executor_of</code> only if they satisfy the requirements of the
+        Table below.
+      </p>
+<p>
+        Let:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            <code class="computeroutput">e</code> denotes a (possibly const) executor object of type <code class="computeroutput">E</code>,
+          </li>
+<li class="listitem">
+            <code class="computeroutput">cf</code> denotes the function object <code class="computeroutput">DECAY_COPY(std::forward&lt;F&gt;(f))</code>
+          </li>
+<li class="listitem">
+            <code class="computeroutput">f</code> denotes a function of type <code class="computeroutput">F&amp;&amp;</code> invocable
+            as <code class="computeroutput">cf()</code> and where <code class="computeroutput">decay_t&lt;F&gt;</code> models
+            <code class="computeroutput">move_constructible</code>.
+          </li>
+</ul></div>
+<p>
+        The expression <code class="computeroutput">execution::execute(e, f)</code>:
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            Evaluates <code class="computeroutput">DECAY_COPY(std::forward&lt;F&gt;(f))</code> on the calling
+            thread to create <code class="computeroutput">cf</code> that will be invoked at most once by
+            an execution agent.
+          </li>
+<li class="listitem">
+            May block pending completion of this invocation. Synchronizes with [intro.multithread]
+            the invocation of <code class="computeroutput">f</code>.
+          </li>
+<li class="listitem">
+            Shall not propagate any exception thrown by the function object or any
+            other function submitted to the executor.
+          </li>
+</ul></div>
+<p>
+        [<span class="emphasis"><em>Note:</em></span> The treatment of exceptions thrown by one-way
+        submitted functions is implementation-defined. The forward progress guarantee
+        of the associated execution agent(s) is implementation-defined. —<span class="emphasis"><em>end
+        note</em></span>]
+      </p>
+<h5>
+<a name="asio.reference.Executor1.h1"></a>
+        <span><a name="asio.reference.Executor1.networking_ts_style_executors"></a></span><a class="link" href="Executor1.html#asio.reference.Executor1.networking_ts_style_executors">Networking
+        TS-style executors</a>
+      </h5>
+<p>
+        The library describes a standard set of requirements for <span class="emphasis"><em>executors</em></span>.
+        A type meeting the <code class="computeroutput">Executor</code> requirements embodies a set of rules
+        for determining how submitted function objects are to be executed.
+      </p>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">Executor</code> requirements if it
+        satisfies the requirements of <code class="computeroutput">CopyConstructible</code> (C++Std [copyconstructible])
+        and <code class="computeroutput">Destructible</code> (C++Std [destructible]), as well as the additional
+        requirements listed below.
+      </p>
+<p>
+        No constructor, comparison operator, copy operation, move operation, swap
+        operation, or member functions <code class="computeroutput">context</code>, <code class="computeroutput">on_work_started</code>,
+        and <code class="computeroutput">on_work_finished</code> on these types shall exit via an exception.
+      </p>
+<p>
+        The executor copy constructor, comparison operators, and other member functions
+        defined in these requirements shall not introduce data races as a result
+        of concurrent calls to those functions from different threads.
+      </p>
+<p>
+        Let <code class="computeroutput">ctx</code> be the execution context returned by the executor's
+        <code class="computeroutput">context()</code> member function. An executor becomes <span class="emphasis"><em>invalid</em></span>
+        when the first call to <code class="computeroutput">ctx.shutdown()</code> returns. The effect of
+        calling <code class="computeroutput">on_work_started</code>, <code class="computeroutput">on_work_finished</code>, <code class="computeroutput">dispatch</code>,
+        <code class="computeroutput">post</code>, or <code class="computeroutput">defer</code> on an invalid executor is undefined.
+        [<span class="emphasis"><em>Note:</em></span> The copy constructor, comparison operators, and
+        <code class="computeroutput">context()</code> member function continue to remain valid until <code class="computeroutput">ctx</code>
+        is destroyed. —<span class="emphasis"><em>end note</em></span>]
+      </p>
+<p>
+        In the table below, <code class="computeroutput">x1</code> and <code class="computeroutput">x2</code> denote (possibly
+        const) values of type <code class="computeroutput">X</code>, <code class="computeroutput">mx1</code> denotes an xvalue
+        of type <code class="computeroutput">X</code>, <code class="computeroutput">f</code> denotes a <code class="computeroutput">MoveConstructible</code>
+        (C++Std [moveconstructible]) function object callable with zero arguments,
+        <code class="computeroutput">a</code> denotes a (possibly const) value of type <code class="computeroutput">A</code> meeting
+        the <code class="computeroutput">Allocator</code> requirements (C++Std [allocator.requirements]),
+        and <code class="computeroutput">u</code> denotes an identifier.
+      </p>
+<div class="table">
+<a name="asio.reference.Executor1.t0"></a><p class="title"><b>Table 15. Executor requirements</b></p>
+<div class="table-contents"><table class="table" summary="Executor requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">X u(x1);</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Shall not exit via an exception.<br> <br> post: <code class="computeroutput">u ==
+                  x1</code> and <code class="computeroutput">std::addressof(u.context()) == std::addressof(x1.context()).</code>
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">X u(mx1);</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Shall not exit via an exception.<br> <br> post: <code class="computeroutput">u</code>
+                  equals the prior value of <code class="computeroutput">mx1</code> and <code class="computeroutput">std::addressof(u.context())</code>
+                  equals the prior value of <code class="computeroutput">std::addressof(mx1.context())</code>.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1 == x2</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">bool</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns <code class="computeroutput">true</code> only if <code class="computeroutput">x1</code> and <code class="computeroutput">x2</code>
+                  can be interchanged with identical effects in any of the expressions
+                  defined in these type requirements. [<span class="emphasis"><em>Note:</em></span>
+                  Returning <code class="computeroutput">false</code> does not necessarily imply that the
+                  effects are not identical. —<span class="emphasis"><em>end note</em></span>] <br>
+                  <br> <code class="computeroutput">operator==</code> shall be reflexive, symmetric, and
+                  transitive, and shall not exit via an exception.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1 != x2</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">bool</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Same as <code class="computeroutput">!(x1 == x2)</code>.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1.context()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">execution_context&amp;</code>, or <code class="computeroutput">E&amp;</code> where
+                  <code class="computeroutput">E</code> is a type that satifisfies the <a class="link" href="ExecutionContext.html" title="Execution context requirements"><code class="computeroutput">ExecutionContext</code></a>
+                  requirements.
+                </p>
+              </td>
+<td>
+                <p>
+                  Shall not exit via an exception.<br> <br> The comparison operators
+                  and member functions defined in these requirements shall not alter
+                  the reference returned by this function.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1.on_work_started()</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Shall not exit via an exception.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1.on_work_finished()</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Shall not exit via an exception.<br> <br> Precondition: A preceding
+                  call <code class="computeroutput">x2.on_work_started()</code> where <code class="computeroutput">x1 == x2</code>.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1.dispatch(std::move(f),a)</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Effects: Creates an object <code class="computeroutput">f1</code> initialized with <code class="literal"><span class="emphasis"><em>DECAY_COPY</em></span></code><code class="computeroutput">(forward&lt;Func&gt;(f))</code>
+                  (C++Std [thread.decaycopy]) in the current thread of execution
+                  . Calls <code class="computeroutput">f1()</code> at most once. The executor may block
+                  forward progress of the caller until <code class="computeroutput">f1()</code> finishes
+                  execution.<br> <br> Executor implementations should use the
+                  supplied allocator to allocate any memory required to store the
+                  function object. Prior to invoking the function object, the executor
+                  shall deallocate any memory allocated. [<span class="emphasis"><em>Note:</em></span>
+                  Executors defined in this Technical Specification always use the
+                  supplied allocator unless otherwise specified. —<span class="emphasis"><em>end note</em></span>]
+                  <br> <br> Synchronization: The invocation of <code class="computeroutput">dispatch</code>
+                  synchronizes with (C++Std [intro.multithread]) the invocation of
+                  <code class="computeroutput">f1</code>.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">x1.post(std::move(f),a)</code><br> <code class="computeroutput">x1.defer(std::move(f),a)</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Effects: Creates an object <code class="computeroutput">f1</code> initialized with <code class="literal"><span class="emphasis"><em>DECAY_COPY</em></span></code><code class="computeroutput">(forward&lt;Func&gt;(f))</code>
+                  in the current thread of execution. Calls <code class="computeroutput">f1()</code> at
+                  most once. The executor shall not block forward progress of the
+                  caller pending completion of <code class="computeroutput">f1()</code>.<br> <br> Executor
+                  implementations should use the supplied allocator to allocate any
+                  memory required to store the function object. Prior to invoking
+                  the function object, the executor shall deallocate any memory allocated.
+                  [<span class="emphasis"><em>Note:</em></span> Executors defined in this Technical
+                  Specification always use the supplied allocator unless otherwise
+                  specified. —<span class="emphasis"><em>end note</em></span>] <br> <br> Synchronization:
+                  The invocation of <code class="computeroutput">post</code> or <code class="computeroutput">defer</code> synchronizes
+                  with (C++Std [intro.multithread]) the invocation of <code class="computeroutput">f1</code>.<br>
+                  <br> [<span class="emphasis"><em>Note:</em></span> Although the requirements placed
+                  on <code class="computeroutput">defer</code> are identical to <code class="computeroutput">post</code>, the use
+                  of <code class="computeroutput">post</code> conveys a preference that the caller <span class="emphasis"><em>does
+                  not</em></span> block the first step of <code class="literal">f1</code>'s
+                  progress, whereas <code class="computeroutput">defer</code> conveys a preference that
+                  the caller <span class="emphasis"><em>does</em></span> block the first step of <code class="literal">f1</code>.
+                  One use of <code class="computeroutput">defer</code> is to convey the intention of the
+                  caller that <code class="literal">f1</code> is a continuation of the current
+                  call context. The executor may use this information to optimize
+                  or otherwise adjust the way in which <code class="computeroutput">f1</code> is invoked.
+                  —<span class="emphasis"><em>end note</em></span>]
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="ExecutionContext.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="GettableSerialPortOption.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/GettableSerialPortOption.html

@@ -0,0 +1,95 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Gettable serial port option requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="Executor1.html" title="Executor requirements">
+<link rel="next" href="GettableSocketOption.html" title="Gettable socket option requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="Executor1.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="GettableSocketOption.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.GettableSerialPortOption"></a><a class="link" href="GettableSerialPortOption.html" title="Gettable serial port option requirements">Gettable serial
+      port option requirements</a>
+</h3></div></div></div>
+<p>
+        In the table below, <code class="computeroutput">X</code> denotes a serial port option class, <code class="computeroutput">a</code>
+        denotes a value of <code class="computeroutput">X</code>, <code class="computeroutput">ec</code> denotes a value of type
+        <code class="computeroutput">error_code</code>, and <code class="computeroutput">s</code> denotes a value of implementation-defined
+        type <span class="emphasis"><em><code class="literal">storage</code></em></span> (where <span class="emphasis"><em><code class="literal">storage</code></em></span>
+        is the type <code class="computeroutput">DCB</code> on Windows and <code class="computeroutput">termios</code> on <span class="emphasis"><em>POSIX</em></span>
+        platforms), and <code class="computeroutput">u</code> denotes an identifier.
+      </p>
+<div class="table">
+<a name="asio.reference.GettableSerialPortOption.t0"></a><p class="title"><b>Table 16. GettableSerialPortOption requirements</b></p>
+<div class="table-contents"><table class="table" summary="GettableSerialPortOption requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody><tr>
+<td>
+                <p>
+                  <code class="computeroutput">const </code><span class="emphasis"><em><code class="literal">storage</code></em></span><code class="computeroutput">&amp;
+                  u = s;</code><br> <code class="computeroutput">a.load(u, ec);</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">error_code</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Retrieves the value of the serial port option from the storage.<br>
+                  <br> If successful, sets <code class="computeroutput">ec</code> such that <code class="computeroutput">!ec</code>
+                  is true. If an error occurred, sets <code class="computeroutput">ec</code> such that
+                  <code class="computeroutput">!!ec</code> is true. Returns <code class="computeroutput">ec</code>.
+                </p>
+              </td>
+</tr></tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="Executor1.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="GettableSocketOption.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/GettableSocketOption.html

@@ -0,0 +1,175 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Gettable socket option requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="GettableSerialPortOption.html" title="Gettable serial port option requirements">
+<link rel="next" href="Handler.html" title="Handlers">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="GettableSerialPortOption.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="Handler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.GettableSocketOption"></a><a class="link" href="GettableSocketOption.html" title="Gettable socket option requirements">Gettable socket
+      option requirements</a>
+</h3></div></div></div>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">GettableSocketOption</code> requirements
+        if it satisfies the requirements listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">a</code> denotes a (possibly const) value of type
+        <code class="computeroutput">X</code>, <code class="computeroutput">b</code> denotes a value of type <code class="computeroutput">X</code>, <code class="computeroutput">p</code>
+        denotes a (possibly const) value that meets the <a class="link" href="Protocol.html" title="Protocol requirements"><code class="computeroutput">Protocol</code></a>
+        requirements, and <code class="computeroutput">s</code> denotes a (possibly const) value of a type
+        that is convertible to <code class="computeroutput">size_t</code> and denotes a size in bytes.
+      </p>
+<div class="table">
+<a name="asio.reference.GettableSocketOption.t0"></a><p class="title"><b>Table 17. GettableSocketOption requirements for extensible implementations</b></p>
+<div class="table-contents"><table class="table" summary="GettableSocketOption requirements for extensible implementations">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.level(p)</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">int</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns a value suitable for passing as the <span class="emphasis"><em>level</em></span>
+                  argument to <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html" target="_top"><code class="computeroutput"><span class="identifier">getsockopt</span><span class="special">()</span></code></a>
+                  (or equivalent).
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.name(p)</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">int</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns a value suitable for passing as the <span class="emphasis"><em>option_name</em></span>
+                  argument to <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html" target="_top"><code class="computeroutput"><span class="identifier">getsockopt</span><span class="special">()</span></code></a>
+                  (or equivalent).
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">b.data(p)</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">void*</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns a pointer suitable for passing as the <span class="emphasis"><em>option_value</em></span>
+                  argument to <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html" target="_top"><code class="computeroutput"><span class="identifier">getsockopt</span><span class="special">()</span></code></a>
+                  (or equivalent).
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.size(p)</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">size_t</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns a value suitable for passing as the <span class="emphasis"><em>option_len</em></span>
+                  argument to <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html" target="_top"><code class="computeroutput"><span class="identifier">getsockopt</span><span class="special">()</span></code></a>
+                  (or equivalent), after appropriate integer conversion has been
+                  performed.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">b.resize(p,s)</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  post: <code class="computeroutput">b.size(p) == s</code>.<br> Passed the value contained
+                  in the <span class="emphasis"><em>option_len</em></span> argument to <span class="emphasis"><em>POSIX</em></span>
+                  <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html" target="_top"><code class="computeroutput"><span class="identifier">getsockopt</span><span class="special">()</span></code></a>
+                  (or equivalent) after successful completion of the function. Permitted
+                  to throw an exception if the socket option object <code class="computeroutput">b</code>
+                  does not support the specified size.
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="GettableSerialPortOption.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="Handler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/Handler.html

@@ -0,0 +1,150 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Handlers</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="GettableSocketOption.html" title="Gettable socket option requirements">
+<link rel="next" href="HandshakeHandler.html" title="SSL handshake handler requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="GettableSocketOption.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="HandshakeHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.Handler"></a><a class="link" href="Handler.html" title="Handlers">Handlers</a>
+</h3></div></div></div>
+<p>
+        A handler must meet the requirements of <code class="computeroutput">MoveConstructible</code> types
+        (C++Std [moveconstructible]).
+      </p>
+<p>
+        In the table below, <code class="computeroutput">X</code> denotes a handler class, <code class="computeroutput">h</code>
+        denotes a value of <code class="computeroutput">X</code>, <code class="computeroutput">p</code> denotes a pointer to a
+        block of allocated memory of type <code class="computeroutput">void*</code>, <code class="computeroutput">s</code> denotes
+        the size for a block of allocated memory, and <code class="computeroutput">f</code> denotes a function
+        object taking no arguments.
+      </p>
+<div class="table">
+<a name="asio.reference.Handler.t0"></a><p class="title"><b>Table 18. Handler requirements</b></p>
+<div class="table-contents"><table class="table" summary="Handler requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  return type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+</p>
+<pre class="programlisting">using asio::asio_handler_allocate;
+asio_handler_allocate(s, &amp;h);
+</pre>
+<p>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">void*</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns a pointer to a block of memory of size <code class="computeroutput">s</code>.
+                  The pointer must satisfy the same alignment requirements as a pointer
+                  returned by <code class="computeroutput">::operator new()</code>. Throws <code class="computeroutput">bad_alloc</code>
+                  on failure.<br> <br> The <code class="computeroutput">asio_handler_allocate()</code>
+                  function is located using argument-dependent lookup. The function
+                  <code class="computeroutput">asio::asio_handler_allocate()</code> serves as a default
+                  if no user-supplied function is available.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+</p>
+<pre class="programlisting">using asio::asio_handler_deallocate;
+asio_handler_deallocate(p, s, &amp;h);
+</pre>
+<p>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Frees a block of memory associated with a pointer <code class="computeroutput">p</code>,
+                  of at least size <code class="computeroutput">s</code>, that was previously allocated
+                  using <code class="computeroutput">asio_handler_allocate()</code>.<br> <br> The <code class="computeroutput">asio_handler_deallocate()</code>
+                  function is located using argument-dependent lookup. The function
+                  <code class="computeroutput">asio::asio_handler_deallocate()</code> serves as a default
+                  if no user-supplied function is available.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+</p>
+<pre class="programlisting">using asio::asio_handler_invoke;
+asio_handler_invoke(f, &amp;h);
+</pre>
+<p>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  Causes the function object <code class="computeroutput">f</code> to be executed as if
+                  by calling <code class="computeroutput">f()</code>.<br> <br> The <code class="computeroutput">asio_handler_invoke()</code>
+                  function is located using argument-dependent lookup. The function
+                  <code class="computeroutput">asio::asio_handler_invoke()</code> serves as a default if
+                  no user-supplied function is available.
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="GettableSocketOption.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="HandshakeHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/HandshakeHandler.html

@@ -0,0 +1,108 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>SSL handshake handler requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="Handler.html" title="Handlers">
+<link rel="next" href="InternetProtocol.html" title="Internet protocol requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="Handler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="InternetProtocol.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.HandshakeHandler"></a><a class="link" href="HandshakeHandler.html" title="SSL handshake handler requirements">SSL handshake handler
+      requirements</a>
+</h3></div></div></div>
+<p>
+        A handshake handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>.
+        A value <code class="computeroutput">h</code> of a handshake handler class should work correctly
+        in the expression <code class="computeroutput">h(ec)</code>, where <code class="computeroutput">ec</code> is an lvalue
+        of type <code class="computeroutput">const error_code</code>.
+      </p>
+<h5>
+<a name="asio.reference.HandshakeHandler.h0"></a>
+        <span><a name="asio.reference.HandshakeHandler.examples"></a></span><a class="link" href="HandshakeHandler.html#asio.reference.HandshakeHandler.examples">Examples</a>
+      </h5>
+<p>
+        A free function as a handshake handler:
+      </p>
+<pre class="programlisting">void handshake_handler(
+    const asio::error_code&amp; ec)
+{
+  ...
+}
+</pre>
+<p>
+        A handshake handler function object:
+      </p>
+<pre class="programlisting">struct handshake_handler
+{
+  ...
+  void operator()(
+      const asio::error_code&amp; ec)
+  {
+    ...
+  }
+  ...
+};
+</pre>
+<p>
+        A lambda as a handshake handler:
+      </p>
+<pre class="programlisting">ssl_stream.async_handshake(...,
+    [](const asio::error_code&amp; ec)
+    {
+      ...
+    });
+</pre>
+<p>
+        A non-static class member function adapted to a handshake handler using
+        <code class="computeroutput">std::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::handshake_handler(
+    const asio::error_code&amp; ec)
+{
+  ...
+}
+...
+ssl_stream.async_handshake(...,
+    std::bind(&amp;my_class::handshake_handler,
+      this, std::placeholders::_1));
+</pre>
+<p>
+        A non-static class member function adapted to a handshake handler using
+        <code class="computeroutput">boost::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::handshake_handler(
+    const asio::error_code&amp; ec)
+{
+  ...
+}
+...
+ssl_stream.async_handshake(...,
+    boost::bind(&amp;my_class::handshake_handler,
+      this, asio::placeholders::error));
+</pre>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="Handler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="InternetProtocol.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/InternetProtocol.html

@@ -0,0 +1,163 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Internet protocol requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="HandshakeHandler.html" title="SSL handshake handler requirements">
+<link rel="next" href="IoControlCommand.html" title="I/O control command requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="HandshakeHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="IoControlCommand.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.InternetProtocol"></a><a class="link" href="InternetProtocol.html" title="Internet protocol requirements">Internet protocol requirements</a>
+</h3></div></div></div>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">InternetProtocol</code> requirements
+        if it satisfies the requirements of <a class="link" href="AcceptableProtocol.html" title="Acceptable protocol requirements"><code class="computeroutput">AcceptableProtocol</code></a>,
+        as well as the additional requirements listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">a</code> denotes a (possibly const) value of type
+        <code class="computeroutput">X</code>, and <code class="computeroutput">b</code> denotes a (possibly const) value of type
+        <code class="computeroutput">X</code>.
+      </p>
+<div class="table">
+<a name="asio.reference.InternetProtocol.t0"></a><p class="title"><b>Table 19. InternetProtocol requirements</b></p>
+<div class="table-contents"><table class="table" summary="InternetProtocol requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  return type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">X::resolver</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">ip::basic_resolver&lt;X&gt;</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  The type of a resolver for the protocol.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">X::v4()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">X</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns an object representing the IP version 4 protocol.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">X::v6()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">X</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns an object representing the IP version 6 protocol.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a == b</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  convertible to <code class="computeroutput">bool</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns <code class="computeroutput">true</code> if <code class="computeroutput">a</code> and <code class="computeroutput">b</code>
+                  represent the same IP protocol version, otherwise <code class="computeroutput">false</code>.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a != b</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  convertible to <code class="computeroutput">bool</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns <code class="computeroutput">!(a == b)</code>.
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="HandshakeHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="IoControlCommand.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/IoControlCommand.html

@@ -0,0 +1,109 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>I/O control command requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="InternetProtocol.html" title="Internet protocol requirements">
+<link rel="next" href="IoObjectService.html" title="I/O object service requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="InternetProtocol.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="IoObjectService.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.IoControlCommand"></a><a class="link" href="IoControlCommand.html" title="I/O control command requirements">I/O control command
+      requirements</a>
+</h3></div></div></div>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">IoControlCommand</code> requirements
+        if it satisfies the requirements listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">a</code> denotes a (possibly const) value of type
+        <code class="computeroutput">X</code>, and <code class="computeroutput">b</code> denotes a value of type <code class="computeroutput">X</code>.
+      </p>
+<div class="table">
+<a name="asio.reference.IoControlCommand.t0"></a><p class="title"><b>Table 20. IoControlCommand requirements for extensible implementations</b></p>
+<div class="table-contents"><table class="table" summary="IoControlCommand requirements for extensible implementations">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-conditions
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">a.name()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">int</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Returns a value suitable for passing as the <span class="emphasis"><em>request</em></span>
+                  argument to <span class="emphasis"><em>POSIX</em></span> <a href="http://www.opengroup.org/onlinepubs/9699919799/functions/ioctl.html" target="_top"><code class="computeroutput"><span class="identifier">ioctl</span><span class="special">()</span></code></a>
+                  (or equivalent).
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">b.data()</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  <code class="computeroutput">void*</code>
+                </p>
+              </td>
+<td>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="InternetProtocol.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="IoObjectService.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/IoObjectService.html

@@ -0,0 +1,170 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>I/O object service requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="IoControlCommand.html" title="I/O control command requirements">
+<link rel="next" href="IteratorConnectHandler.html" title="Iterator connect handler requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="IoControlCommand.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="IteratorConnectHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.IoObjectService"></a><a class="link" href="IoObjectService.html" title="I/O object service requirements">I/O object service requirements</a>
+</h3></div></div></div>
+<p>
+        An I/O object service must meet the requirements for a <a class="link" href="Service.html" title="Service requirements">service</a>,
+        as well as the requirements listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">X</code> denotes an I/O object service class,
+        <code class="computeroutput">a</code> and <code class="computeroutput">ao</code> denote values of type <code class="computeroutput">X</code>,
+        <code class="computeroutput">b</code> and <code class="computeroutput">c</code> denote values of type <code class="computeroutput">X::implementation_type</code>,
+        and <code class="computeroutput">u</code> denotes an identifier.
+      </p>
+<div class="table">
+<a name="asio.reference.IoObjectService.t0"></a><p class="title"><b>Table 21. IoObjectService requirements</b></p>
+<div class="table-contents"><table class="table" summary="IoObjectService requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  return type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-condition
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">X::implementation_type</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">X::implementation_type u;</code>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  note: <code class="computeroutput">X::implementation_type</code> has a public default
+                  constructor and destructor.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+</p>
+<pre class="programlisting">a.construct(b);
+</pre>
+<p>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+</p>
+<pre class="programlisting">a.destroy(b);
+</pre>
+<p>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  note: <code class="computeroutput">destroy()</code> will only be called on a value that
+                  has previously been initialised with <code class="computeroutput">construct()</code> or
+                  <code class="computeroutput">move_construct()</code>.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+</p>
+<pre class="programlisting">a.move_construct(b, c);
+</pre>
+<p>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  note: only required for I/O objects that support movability.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+</p>
+<pre class="programlisting">a.move_assign(b, ao, c);
+</pre>
+<p>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  note: only required for I/O objects that support movability.
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="IoControlCommand.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="IteratorConnectHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/IteratorConnectHandler.html

@@ -0,0 +1,118 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Iterator connect handler requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="IoObjectService.html" title="I/O object service requirements">
+<link rel="next" href="LegacyCompletionHandler.html" title="Legacy completion handler requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="IoObjectService.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="LegacyCompletionHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.IteratorConnectHandler"></a><a class="link" href="IteratorConnectHandler.html" title="Iterator connect handler requirements">Iterator connect
+      handler requirements</a>
+</h3></div></div></div>
+<p>
+        An iterator connect handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>.
+        A value <code class="computeroutput">h</code> of an iterator connect handler class should work correctly
+        in the expression <code class="computeroutput">h(ec, i)</code>, where <code class="computeroutput">ec</code> is an lvalue
+        of type <code class="computeroutput">const error_code</code> and <code class="computeroutput">i</code> is an lvalue of
+        the type <code class="computeroutput">Iterator</code> used in the corresponding <code class="computeroutput">connect()</code>
+        or async_connect()` function.
+      </p>
+<h5>
+<a name="asio.reference.IteratorConnectHandler.h0"></a>
+        <span><a name="asio.reference.IteratorConnectHandler.examples"></a></span><a class="link" href="IteratorConnectHandler.html#asio.reference.IteratorConnectHandler.examples">Examples</a>
+      </h5>
+<p>
+        A free function as an iterator connect handler:
+      </p>
+<pre class="programlisting">void connect_handler(
+    const asio::error_code&amp; ec,
+    asio::ip::tcp::resolver::iterator iterator)
+{
+  ...
+}
+</pre>
+<p>
+        An iterator connect handler function object:
+      </p>
+<pre class="programlisting">struct connect_handler
+{
+  ...
+  template &lt;typename Iterator&gt;
+  void operator()(
+      const asio::error_code&amp; ec,
+      Iterator iterator)
+  {
+    ...
+  }
+  ...
+};
+</pre>
+<p>
+        A lambda as an iterator connect handler:
+      </p>
+<pre class="programlisting">asio::async_connect(...,
+    [](const asio::error_code&amp; ec,
+      asio::ip::tcp::resolver::iterator iterator)
+    {
+      ...
+    });
+</pre>
+<p>
+        A non-static class member function adapted to an iterator connect handler
+        using <code class="computeroutput">std::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::connect_handler(
+    const asio::error_code&amp; ec,
+    asio::ip::tcp::resolver::iterator iterator)
+{
+  ...
+}
+...
+asio::async_connect(...,
+    std::bind(&amp;my_class::connect_handler,
+      this, std::placeholders::_1,
+      std::placeholders::_2));
+</pre>
+<p>
+        A non-static class member function adapted to an iterator connect handler
+        using <code class="computeroutput">boost::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::connect_handler(
+    const asio::error_code&amp; ec,
+    asio::ip::tcp::resolver::iterator iterator)
+{
+  ...
+}
+...
+asio::async_connect(...,
+    boost::bind(&amp;my_class::connect_handler,
+      this, asio::placeholders::error,
+      asio::placeholders::iterator));
+</pre>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="IoObjectService.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="LegacyCompletionHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/LegacyCompletionHandler.html

@@ -0,0 +1,100 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Legacy completion handler requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="IteratorConnectHandler.html" title="Iterator connect handler requirements">
+<link rel="next" href="MoveAcceptHandler.html" title="Move accept handler requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="IteratorConnectHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="MoveAcceptHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.LegacyCompletionHandler"></a><a class="link" href="LegacyCompletionHandler.html" title="Legacy completion handler requirements">Legacy completion
+      handler requirements</a>
+</h3></div></div></div>
+<p>
+        A legacy completion handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>.
+        A legacy completion handler must meet the requirements of <code class="computeroutput">CopyConstructible</code>
+        types (C++Std [copyconstructible]). A value <code class="computeroutput">h</code> of a completion
+        handler class should work correctly in the expression <code class="computeroutput">h()</code>.
+      </p>
+<h5>
+<a name="asio.reference.LegacyCompletionHandler.h0"></a>
+        <span><a name="asio.reference.LegacyCompletionHandler.examples"></a></span><a class="link" href="LegacyCompletionHandler.html#asio.reference.LegacyCompletionHandler.examples">Examples</a>
+      </h5>
+<p>
+        A free function as a completion handler:
+      </p>
+<pre class="programlisting">void completion_handler()
+{
+  ...
+}
+</pre>
+<p>
+        A completion handler function object:
+      </p>
+<pre class="programlisting">struct completion_handler
+{
+  ...
+  void operator()()
+  {
+    ...
+  }
+  ...
+};
+</pre>
+<p>
+        A lambda as a completion handler:
+      </p>
+<pre class="programlisting">my_io_service.post(
+    []()
+    {
+      ...
+    });
+</pre>
+<p>
+        A non-static class member function adapted to a completion handler using
+        <code class="computeroutput">std::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::completion_handler()
+{
+  ...
+}
+...
+my_io_service.post(std::bind(&amp;my_class::completion_handler, this));
+</pre>
+<p>
+        A non-static class member function adapted to a completion handler using
+        <code class="computeroutput">boost::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::completion_handler()
+{
+  ...
+}
+...
+my_io_service.post(boost::bind(&amp;my_class::completion_handler, this));
+</pre>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="IteratorConnectHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="MoveAcceptHandler.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/MoveAcceptHandler.html

@@ -0,0 +1,97 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Move accept handler requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="LegacyCompletionHandler.html" title="Legacy completion handler requirements">
+<link rel="next" href="MutableBufferSequence.html" title="Mutable buffer sequence requirements">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="LegacyCompletionHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="MutableBufferSequence.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.MoveAcceptHandler"></a><a class="link" href="MoveAcceptHandler.html" title="Move accept handler requirements">Move accept handler
+      requirements</a>
+</h3></div></div></div>
+<p>
+        A move accept handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>.
+        A value <code class="computeroutput">h</code> of a move accept handler class should work correctly
+        in the expression <code class="computeroutput">h(ec, s)</code>, where <code class="computeroutput">ec</code> is an lvalue
+        of type <code class="computeroutput">const error_code</code> and <code class="computeroutput">s</code> is an lvalue of
+        the nested type <code class="computeroutput">Protocol::socket</code> for the type <code class="computeroutput">Protocol</code>
+        of the socket class template.
+      </p>
+<h5>
+<a name="asio.reference.MoveAcceptHandler.h0"></a>
+        <span><a name="asio.reference.MoveAcceptHandler.examples"></a></span><a class="link" href="MoveAcceptHandler.html#asio.reference.MoveAcceptHandler.examples">Examples</a>
+      </h5>
+<p>
+        A free function as a move accept handler:
+      </p>
+<pre class="programlisting">void accept_handler(
+    const asio::error_code&amp; ec, asio::ip::tcp::socket s)
+{
+  ...
+}
+</pre>
+<p>
+        A move accept handler function object:
+      </p>
+<pre class="programlisting">struct accept_handler
+{
+  ...
+  void operator()(
+      const asio::error_code&amp; ec, asio::ip::tcp::socket s)
+  {
+    ...
+  }
+  ...
+};
+</pre>
+<p>
+        A lambda as a move accept handler:
+      </p>
+<pre class="programlisting">acceptor.async_accept(...,
+    [](const asio::error_code&amp; ec, asio::ip::tcp::socket s)
+    {
+      ...
+    });
+</pre>
+<p>
+        A non-static class member function adapted to a move accept handler using
+        <code class="computeroutput">std::bind()</code>:
+      </p>
+<pre class="programlisting">void my_class::accept_handler(
+    const asio::error_code&amp; ec, asio::ip::tcp::socket socket)
+{
+  ...
+}
+...
+asio::async_accept(...,
+    std::bind(&amp;my_class::accept_handler,
+      this, std::placeholders::_1,
+      std::placeholders::_2));
+</pre>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="LegacyCompletionHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="MutableBufferSequence.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/MutableBufferSequence.html

@@ -0,0 +1,130 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Mutable buffer sequence requirements</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
+<link rel="up" href="../reference.html" title="Reference">
+<link rel="prev" href="MoveAcceptHandler.html" title="Move accept handler requirements">
+<link rel="next" href="OperationState.html" title="Operation state concept">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="MoveAcceptHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="OperationState.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.MutableBufferSequence"></a><a class="link" href="MutableBufferSequence.html" title="Mutable buffer sequence requirements">Mutable buffer
+      sequence requirements</a>
+</h3></div></div></div>
+<p>
+        A <span class="emphasis"><em>mutable buffer sequence</em></span> represents a set of memory
+        regions that may be used to receive the output of an operation, such as the
+        <code class="computeroutput">receive</code> operation of a socket.
+      </p>
+<p>
+        A type <code class="computeroutput">X</code> meets the <code class="computeroutput">MutableBufferSequence</code> requirements
+        if it satisfies the requirements of <code class="computeroutput">Destructible</code> (C++Std [destructible])
+        and <code class="computeroutput">CopyConstructible</code> (C++Std [copyconstructible]), as well
+        as the additional requirements listed below.
+      </p>
+<p>
+        In the table below, <code class="computeroutput">x</code> denotes a (possibly const) value of type
+        <code class="computeroutput">X</code>, and <code class="computeroutput">u</code> denotes an identifier.
+      </p>
+<div class="table">
+<a name="asio.reference.MutableBufferSequence.t0"></a><p class="title"><b>Table 22. MutableBufferSequence requirements</b></p>
+<div class="table-contents"><table class="table" summary="MutableBufferSequence requirements">
+<colgroup>
+<col>
+<col>
+<col>
+</colgroup>
+<thead><tr>
+<th>
+                <p>
+                  expression
+                </p>
+              </th>
+<th>
+                <p>
+                  return type
+                </p>
+              </th>
+<th>
+                <p>
+                  assertion/note<br> pre/post-condition
+                </p>
+              </th>
+</tr></thead>
+<tbody>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput">asio::buffer_sequence_begin(x)</code><br> <code class="computeroutput">asio::buffer_sequence_end(x)</code>
+                </p>
+              </td>
+<td>
+                <p>
+                  An iterator type meeting the requirements for bidirectional iterators
+                  (C++Std [bidirectional.iterators]) whose value type is convertible
+                  to <code class="computeroutput">mutable_buffer</code>.
+                </p>
+              </td>
+<td>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+</p>
+<pre class="programlisting">X u(x);
+</pre>
+<p>
+                </p>
+              </td>
+<td>
+              </td>
+<td>
+                <p>
+                  post:<br>
+</p>
+<pre class="programlisting">equal(
+  asio::buffer_sequence_begin(x),
+  asio::buffer_sequence_end(x),
+  asio::buffer_sequence_begin(u),
+  asio::buffer_sequence_end(u),
+  [](const mutable_buffer&amp; b1,
+     const mutable_buffer&amp; b2)
+   {
+     return b1.data() == b2.data()
+         &amp;&amp; b1.size() == b2.size();
+   })
+</pre>
+<p>
+                </p>
+              </td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<br class="table-break">
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="MoveAcceptHandler.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="OperationState.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>

include/asio/doc/asio/reference/OperationState.html

@@ -0,0 +1,66 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>Operation state concept</title>
+<link rel="stylesheet" href="../../boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Asio">
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+<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="MutableBufferSequence.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="ProtoAllocator.html"><img src="../../next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="asio.reference.OperationState"></a><a class="link" href="OperationState.html" title="Operation state concept">Operation state concept</a>
+</h3></div></div></div>
+<pre class="programlisting">template&lt;class O&gt;
+  concept operation_state =
+    destructible&lt;O&gt; &amp;&amp;
+    is_object_v&lt;O&gt; &amp;&amp;
+    requires (O&amp; o) {
+      { execution::start(o) } noexcept;
+    };
+</pre>
+<p>
+        An object whose type satisfies <code class="computeroutput">operation_state</code> represents the
+        state of an asynchronous operation. It is the result of calling <code class="computeroutput">execution::connect</code>
+        with a <code class="computeroutput">sender</code> and a <code class="computeroutput">receiver</code>.
+      </p>
+<p>
+        <code class="computeroutput">execution::start</code> may be called on an <code class="computeroutput">operation_state</code>
+        object at most once. Once <code class="computeroutput">execution::start</code> has been invoked,
+        the caller shall ensure that the start of a non-exceptional invocation of
+        one of the receiver's completion-signalling operations strongly happens before
+        [intro.multithread] the call to the <code class="computeroutput">operation_state</code> destructor.
+      </p>
+<p>
+        The start of the invocation of <code class="computeroutput">execution::start</code> shall strongly
+        happen before [intro.multithread] the invocation of one of the three receiver
+        operations.
+      </p>
+<p>
+        <code class="computeroutput">execution::start</code> may or may not block pending the successful
+        transfer of execution to one of the three receiver operations.
+      </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
+      Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="MutableBufferSequence.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="ProtoAllocator.html"><img src="../../next.png" alt="Next"></a>
+</div>
+</body>
+</html>