diff options
Diffstat (limited to '3rdparty/asio/src/examples/cpp03/buffers/reference_counted.cpp')
-rw-r--r-- | 3rdparty/asio/src/examples/cpp03/buffers/reference_counted.cpp | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/3rdparty/asio/src/examples/cpp03/buffers/reference_counted.cpp b/3rdparty/asio/src/examples/cpp03/buffers/reference_counted.cpp new file mode 100644 index 00000000000..9f7455cdbbd --- /dev/null +++ b/3rdparty/asio/src/examples/cpp03/buffers/reference_counted.cpp @@ -0,0 +1,131 @@ +// +// reference_counted.cpp +// ~~~~~~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2016 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.hpp> +#include <boost/bind.hpp> +#include <boost/enable_shared_from_this.hpp> +#include <boost/shared_ptr.hpp> +#include <iostream> +#include <vector> + +using asio::ip::tcp; + +// A reference-counted non-modifiable buffer class. +class shared_const_buffer +{ +public: + // Construct from a std::string. + explicit shared_const_buffer(const std::string& data) + : data_(new std::vector<char>(data.begin(), data.end())), + buffer_(asio::buffer(*data_)) + { + } + + // Implement the ConstBufferSequence requirements. + typedef asio::const_buffer value_type; + typedef const asio::const_buffer* const_iterator; + const asio::const_buffer* begin() const { return &buffer_; } + const asio::const_buffer* end() const { return &buffer_ + 1; } + +private: + boost::shared_ptr<std::vector<char> > data_; + asio::const_buffer buffer_; +}; + +class session + : public boost::enable_shared_from_this<session> +{ +public: + session(asio::io_context& io_context) + : socket_(io_context) + { + } + + tcp::socket& socket() + { + return socket_; + } + + void start() + { + using namespace std; // For time_t, time and ctime. + time_t now = time(0); + shared_const_buffer buffer(ctime(&now)); + asio::async_write(socket_, buffer, + boost::bind(&session::handle_write, shared_from_this())); + } + + void handle_write() + { + } + +private: + // The socket used to communicate with the client. + tcp::socket socket_; +}; + +typedef boost::shared_ptr<session> session_ptr; + +class server +{ +public: + server(asio::io_context& io_context, short port) + : io_context_(io_context), + acceptor_(io_context, tcp::endpoint(tcp::v4(), port)) + { + session_ptr new_session(new session(io_context_)); + acceptor_.async_accept(new_session->socket(), + boost::bind(&server::handle_accept, this, new_session, + asio::placeholders::error)); + } + + void handle_accept(session_ptr new_session, + const asio::error_code& error) + { + if (!error) + { + new_session->start(); + } + + new_session.reset(new session(io_context_)); + acceptor_.async_accept(new_session->socket(), + boost::bind(&server::handle_accept, this, new_session, + asio::placeholders::error)); + } + +private: + asio::io_context& io_context_; + tcp::acceptor acceptor_; +}; + +int main(int argc, char* argv[]) +{ + try + { + if (argc != 2) + { + std::cerr << "Usage: reference_counted <port>\n"; + return 1; + } + + asio::io_context io_context; + + using namespace std; // For atoi. + server s(io_context, atoi(argv[1])); + + io_context.run(); + } + catch (std::exception& e) + { + std::cerr << "Exception: " << e.what() << "\n"; + } + + return 0; +} |