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// // server.cpp // ~~~~~~~~~~ // // Copyright (c) 2003-2008 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 <ctime> #include <iostream> #include <string> #include <boost/bind.hpp> #include <boost/shared_ptr.hpp> #include <boost/enable_shared_from_this.hpp> #include <asio.hpp> using asio::ip::tcp; std::string make_daytime_string() { using namespace std; // For time_t, time and ctime; time_t now = time(0); return ctime(&now); } class tcp_connection : public boost::enable_shared_from_this<tcp_connection> { public: typedef boost::shared_ptr<tcp_connection> pointer; static pointer create(asio::io_service& io_service) { return pointer(new tcp_connection(io_service)); } tcp::socket& socket() { return socket_; } void start() { message_ = make_daytime_string(); asio::async_write(socket_, asio::buffer(message_), boost::bind(&tcp_connection::handle_write, shared_from_this(), asio::placeholders::error, asio::placeholders::bytes_transferred)); } private: tcp_connection(asio::io_service& io_service) : socket_(io_service) { } void handle_write(const asio::error_code& /*error*/, size_t /*bytes_transferred*/) { } tcp::socket socket_; std::string message_; }; class tcp_server { public: tcp_server(asio::io_service& io_service) : acceptor_(io_service, tcp::endpoint(tcp::v4(), 13)) { start_accept(); } private: void start_accept() { tcp_connection::pointer new_connection = tcpion::pointer< As in Step 4, when making the call to deadline_timer::async_wait() frommainwe bind the additional parameters needed for thet.async_wait(boost::bind(print, asio::placeholders::error, &t, &count)); io.run();Finally, just to prove that the
countvariable was being used in thestd::cout << "Final count is " << count << "\n"; return 0; }See the full source listing
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