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-rw-r--r--3rdparty/asio/src/examples/cpp17/coroutines_ts/refactored_echo_server.cpp80
1 files changed, 80 insertions, 0 deletions
diff --git a/3rdparty/asio/src/examples/cpp17/coroutines_ts/refactored_echo_server.cpp b/3rdparty/asio/src/examples/cpp17/coroutines_ts/refactored_echo_server.cpp
new file mode 100644
index 00000000000..42130093c1c
--- /dev/null
+++ b/3rdparty/asio/src/examples/cpp17/coroutines_ts/refactored_echo_server.cpp
@@ -0,0 +1,80 @@
+//
+// refactored_echo_server.cpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2021 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/co_spawn.hpp>
+#include <asio/detached.hpp>
+#include <asio/io_context.hpp>
+#include <asio/ip/tcp.hpp>
+#include <asio/signal_set.hpp>
+#include <asio/write.hpp>
+#include <cstdio>
+
+using asio::ip::tcp;
+using asio::awaitable;
+using asio::co_spawn;
+using asio::detached;
+using asio::use_awaitable;
+namespace this_coro = asio::this_coro;
+
+awaitable<void> echo_once(tcp::socket& socket)
+{
+ char data[128];
+ std::size_t n = co_await socket.async_read_some(asio::buffer(data), use_awaitable);
+ co_await async_write(socket, asio::buffer(data, n), use_awaitable);
+}
+
+awaitable<void> echo(tcp::socket socket)
+{
+ try
+ {
+ for (;;)
+ {
+ // The asynchronous operations to echo a single chunk of data have been
+ // refactored into a separate function. When this function is called, the
+ // operations are still performed in the context of the current
+ // coroutine, and the behaviour is functionally equivalent.
+ co_await echo_once(socket);
+ }
+ }
+ 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
+ {
+ asio::io_context io_context(1);
+
+ 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());
+ }
+}