doc/html/boost_asio/example/cpp17/coroutines_ts/echo_server.cpp – 1.79.0
doc/html/boost_asio/example/cpp17/coroutines_ts/echo_server.cpp
// // echo_server.cpp // ~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2022 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/co_spawn.hpp> #include <boost/asio/detached.hpp> #include <boost/asio/io_context.hpp> #include <boost/asio/ip/tcp.hpp> #include <boost/asio/signal_set.hpp> #include <boost/asio/write.hpp> #include <cstdio> using boost::asio::ip::tcp; using boost::asio::awaitable; using boost::asio::co_spawn; using boost::asio::detached; using boost::asio::use_awaitable; namespace this_coro = boost::asio::this_coro; #if defined(BOOST_ASIO_ENABLE_HANDLER_TRACKING) # define use_awaitable \ boost::asio::use_awaitable_t(__FILE__, __LINE__, __PRETTY_FUNCTION__) #endif awaitable<void> echo(tcp::socket socket) { try { char data[1024]; for (;;) { std::size_t n = co_await socket.async_read_some(boost::asio::buffer(data), use_awaitable); co_await async_write(socket, boost::asio::buffer(data, n), use_awaitable); } } catch (std::exception& e) { std::printf("echo Exception: %s\n", e.what()); } } awaitable<void> listener() { auto executor = co_await this_coro::executor; tcp::acceptor acceptor(executor, {tcp::v4(), 55555}); for (;;) { tcp::socket socket = co_await acceptor.async_accept(use_awaitable); co_spawn(executor, echo(std::move(socket)), detached); } } int main() { try { boost::asio::io_context io_context(1); boost::asio::signal_set signals(io_context, SIGINT, SIGTERM); signals.async_wait([&](auto, auto){ io_context.stop(); }); co_spawn(io_context, listener(), detached); io_context.run(); } catch (std::exception& e) { std::printf("Exception: %s\n", e.what()); } }
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