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//
// wait_for_one_error.cpp
// ~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2023 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.hpp>
#include <boost/asio/experimental/parallel_group.hpp>
#include <iostream>
#if defined(BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR)
int main()
{
boost::asio::io_context ctx;
boost::asio::posix::stream_descriptor in(ctx, ::dup(STDIN_FILENO));
boost::asio::steady_timer timer(ctx, std::chrono::seconds(5));
char data[1024];
boost::asio::experimental::make_parallel_group(
[&](auto token)
{
return in.async_read_some(boost::asio::buffer(data), token);
},
[&](auto token)
{
return timer.async_wait(token);
}
).async_wait(
boost::asio::experimental::wait_for_one_success(),
[](
std::array<std::size_t, 2> completion_order,
boost::system::error_code ec1, std::size_t n1,
boost::system::error_code ec2
)
{
switch (completion_order[0])
{
case 0:
{
std::cout << "descriptor finished: " << ec1 << ", " << n1 << "\n";
}
break;
case 1:
{
std::cout << "timer finished: " << ec2 << "\n";
}
break;
}
}
);
ctx.run();
}
#else // defined(BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR)
int main() {}
#endif // defined(BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR)
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