[DEV] add v1.66.0

libs/asio/example/cpp03/spawn/Jamfile.v2

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+#
+# Copyright (c) 2003-2017 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)
+#
+
+import os ;
+
+if [ os.name ] = SOLARIS
+{
+  lib socket ;
+  lib nsl ;
+}
+else if [ os.name ] = NT
+{
+  lib ws2_32 ;
+  lib mswsock ;
+}
+else if [ os.name ] = HPUX
+{
+  lib ipv6 ;
+}
+else if [ os.name ] = HAIKU
+{
+  lib network ;
+}
+
+exe server
+  : echo_server.cpp
+    /boost/context//boost_context
+    /boost/coroutine//boost_coroutine
+    /boost/system//boost_system
+  : <define>BOOST_ALL_NO_LIB=1
+    <threading>multi
+    <os>SOLARIS:<library>socket
+    <os>SOLARIS:<library>nsl
+    <os>NT:<define>_WIN32_WINNT=0x0501
+    <os>NT,<toolset>gcc:<library>ws2_32
+    <os>NT,<toolset>gcc:<library>mswsock
+    <os>NT,<toolset>gcc-cygwin:<define>__USE_W32_SOCKETS
+    <os>HPUX,<toolset>gcc:<define>_XOPEN_SOURCE_EXTENDED
+    <os>HPUX:<library>ipv6
+    <os>HAIKU:<library>network
+  ;
+
+exe parallel_grep
+  : parallel_grep.cpp
+    /boost/context//boost_context
+    /boost/coroutine//boost_coroutine
+    /boost/system//boost_system
+  : <define>BOOST_ALL_NO_LIB=1
+    <threading>multi
+    <os>SOLARIS:<library>socket
+    <os>SOLARIS:<library>nsl
+    <os>NT:<define>_WIN32_WINNT=0x0501
+    <os>NT,<toolset>gcc:<library>ws2_32
+    <os>NT,<toolset>gcc:<library>mswsock
+    <os>NT,<toolset>gcc-cygwin:<define>__USE_W32_SOCKETS
+    <os>HPUX,<toolset>gcc:<define>_XOPEN_SOURCE_EXTENDED
+    <os>HPUX:<library>ipv6
+    <os>HAIKU:<library>network
+  ;

libs/asio/example/cpp03/spawn/echo_server.cpp

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+//
+// echo_server.cpp
+// ~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2017 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 <boost/asio/deadline_timer.hpp>
+#include <boost/asio/io_context.hpp>
+#include <boost/asio/ip/tcp.hpp>
+#include <boost/asio/spawn.hpp>
+#include <boost/asio/write.hpp>
+#include <boost/bind.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
+#include <iostream>
+
+using boost::asio::ip::tcp;
+
+class session : public boost::enable_shared_from_this<session>
+{
+public:
+  explicit session(boost::asio::io_context& io_context)
+    : strand_(io_context),
+      socket_(io_context),
+      timer_(io_context)
+  {
+  }
+
+  tcp::socket& socket()
+  {
+    return socket_;
+  }
+
+  void go()
+  {
+    boost::asio::spawn(strand_,
+        boost::bind(&session::echo,
+          shared_from_this(), _1));
+    boost::asio::spawn(strand_,
+        boost::bind(&session::timeout,
+          shared_from_this(), _1));
+  }
+
+private:
+  void echo(boost::asio::yield_context yield)
+  {
+    try
+    {
+      char data[128];
+      for (;;)
+      {
+        timer_.expires_from_now(boost::posix_time::seconds(10));
+        std::size_t n = socket_.async_read_some(boost::asio::buffer(data), yield);
+        boost::asio::async_write(socket_, boost::asio::buffer(data, n), yield);
+      }
+    }
+    catch (std::exception& e)
+    {
+      socket_.close();
+      timer_.cancel();
+    }
+  }
+
+  void timeout(boost::asio::yield_context yield)
+  {
+    while (socket_.is_open())
+    {
+      boost::system::error_code ignored_ec;
+      timer_.async_wait(yield[ignored_ec]);
+      if (timer_.expires_from_now() <= boost::posix_time::seconds(0))
+        socket_.close();
+    }
+  }
+
+  boost::asio::io_context::strand strand_;
+  tcp::socket socket_;
+  boost::asio::deadline_timer timer_;
+};
+
+void do_accept(boost::asio::io_context& io_context,
+    unsigned short port, boost::asio::yield_context yield)
+{
+  tcp::acceptor acceptor(io_context, tcp::endpoint(tcp::v4(), port));
+
+  for (;;)
+  {
+    boost::system::error_code ec;
+    boost::shared_ptr<session> new_session(new session(io_context));
+    acceptor.async_accept(new_session->socket(), yield[ec]);
+    if (!ec) new_session->go();
+  }
+}
+
+int main(int argc, char* argv[])
+{
+  try
+  {
+    if (argc != 2)
+    {
+      std::cerr << "Usage: echo_server <port>\n";
+      return 1;
+    }
+
+    boost::asio::io_context io_context;
+
+    boost::asio::spawn(io_context,
+        boost::bind(do_accept,
+          boost::ref(io_context), atoi(argv[1]), _1));
+
+    io_context.run();
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << "Exception: " << e.what() << "\n";
+  }
+
+  return 0;
+}

libs/asio/example/cpp03/spawn/parallel_grep.cpp

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+//
+// parallel_grep.cpp
+// ~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2017 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 <boost/asio/dispatch.hpp>
+#include <boost/asio/post.hpp>
+#include <boost/asio/spawn.hpp>
+#include <boost/asio/strand.hpp>
+#include <boost/asio/thread_pool.hpp>
+#include <boost/thread/thread.hpp>
+#include <boost/bind.hpp>
+#include <fstream>
+#include <iostream>
+#include <string>
+
+using boost::asio::dispatch;
+using boost::asio::spawn;
+using boost::asio::strand;
+using boost::asio::thread_pool;
+using boost::asio::yield_context;
+
+void print_match(std::string input_file, std::string line)
+{
+  std::cout << input_file << ':' << line << std::endl;
+}
+
+void search_file(std::string search_string, std::string input_file,
+    strand<thread_pool::executor_type> output_strand, yield_context yield)
+{
+  std::ifstream is(input_file.c_str());
+  std::string line;
+  std::size_t line_num = 0;
+  while (std::getline(is, line))
+  {
+    // If we find a match, send a message to the output.
+    if (line.find(search_string) != std::string::npos)
+    {
+      dispatch(output_strand, boost::bind(&print_match, input_file, line));
+    }
+
+    // Every so often we yield control to another coroutine.
+    if (++line_num % 10 == 0)
+      post(yield);
+  }
+}
+
+int main(int argc, char* argv[])
+{
+  try
+  {
+    if (argc < 2)
+    {
+      std::cerr << "Usage: parallel_grep <string> <files...>\n";
+      return 1;
+    }
+
+    // We use a fixed size pool of threads for reading the input files. The
+    // number of threads is automatically determined based on the number of
+    // CPUs available in the system.
+    thread_pool pool;
+
+    // To prevent the output from being garbled, we use a strand to synchronise
+    // printing.
+    strand<thread_pool::executor_type> output_strand(pool.get_executor());
+
+    // Spawn a new coroutine for each file specified on the command line.
+    std::string search_string = argv[1];
+    for (int argn = 2; argn < argc; ++argn)
+    {
+      std::string input_file = argv[argn];
+      spawn(pool, boost::bind(&search_file,
+            search_string, input_file, output_strand, _1));
+    }
+
+    // Join the thread pool to wait for all the spawned tasks to complete.
+    pool.join();
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << "Exception: " << e.what() << "\n";
+  }
+
+  return 0;
+}