mirror of
https://github.com/boostorg/asio.git
synced 2026-01-28 06:42:08 +00:00
9e03478ba1
Added new overloads of experimental::make_parallel_group that may be used
to launch a dynamically-sized set of asynchronous operations, where all
operations are the same type. For example:
using op_type = decltype(
socket1.async_read_some(
boost::asio::buffer(data1),
boost::asio::deferred
)
);
std::vector<op_type> ops;
ops.push_back(
socket1.async_read_some(
boost::asio::buffer(data1),
boost::asio::deferred
)
);
ops.push_back(
socket2.async_read_some(
boost::asio::buffer(data2),
boost::asio::deferred
)
);
boost::asio::experimental::make_parallel_group(ops).async_wait(
boost::asio::experimental::wait_for_all(),
[](
std::vector<std::size_t> completion_order,
std::vector<boost::system::error_code> e,
std::vector<std::size_t> n
)
{
for (std::size_t i = 0; i < completion_order.size(); ++i)
{
std::size_t idx = completion_order[i];
std::cout << "socket " << idx << " finished: ";
std::cout << e[idx] << ", " << n[idx] << "\n";
}
}
);
Thanks go to Klemens Morgenstern for supplying part of this implementation.
71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
//
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// ranged_wait_for_all.cpp
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// ~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2022 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include <boost/asio.hpp>
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#include <boost/asio/experimental/parallel_group.hpp>
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#include <iostream>
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#include <vector>
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#ifdef BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR
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int main()
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{
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boost::asio::io_context ctx;
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boost::asio::posix::stream_descriptor out(ctx, ::dup(STDOUT_FILENO));
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boost::asio::posix::stream_descriptor err(ctx, ::dup(STDERR_FILENO));
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using op_type = decltype(
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out.async_write_some(
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boost::asio::buffer("", 0),
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boost::asio::deferred
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)
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);
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std::vector<op_type> ops;
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ops.push_back(
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out.async_write_some(
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boost::asio::buffer("first\r\n", 7),
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boost::asio::deferred
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)
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);
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ops.push_back(
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err.async_write_some(
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boost::asio::buffer("second\r\n", 8),
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boost::asio::deferred
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)
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);
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boost::asio::experimental::make_parallel_group(ops).async_wait(
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boost::asio::experimental::wait_for_all(),
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[](
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std::vector<std::size_t> completion_order,
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std::vector<boost::system::error_code> ec,
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std::vector<std::size_t> n
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)
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{
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for (std::size_t i = 0; i < completion_order.size(); ++i)
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{
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std::size_t idx = completion_order[i];
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std::cout << "operation " << idx << " finished: ";
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std::cout << ec[idx] << ", " << n[idx] << "\n";
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}
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}
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);
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ctx.run();
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}
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#else // defined(BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR)
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int main() {}
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#endif // defined(BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR)
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