62 lines
1.5 KiB
C++
62 lines
1.5 KiB
C++
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// Copyright (c) 2022 Klemens D. Morgenstern
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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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#ifndef BOOST_COBALT_RUN_HPP
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#define BOOST_COBALT_RUN_HPP
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#include <boost/cobalt/spawn.hpp>
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#include <boost/cobalt/task.hpp>
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#include <boost/asio/use_future.hpp>
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namespace boost::cobalt
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{
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template<typename T>
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T run(task<T> t)
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{
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#if !defined(BOOST_COBALT_NO_PMR)
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pmr::unsynchronized_pool_resource root_resource{this_thread::get_default_resource()};
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struct reset_res
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{
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void operator()(pmr::memory_resource * res)
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{
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this_thread::set_default_resource(res);
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}
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};
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std::unique_ptr<pmr::memory_resource, reset_res> pr{
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boost::cobalt::this_thread::set_default_resource(&root_resource)};
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#endif
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std::future<T> f;
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{
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asio::io_context ctx{BOOST_ASIO_CONCURRENCY_HINT_1};
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struct reset_exec
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{
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std::optional<executor> exec;
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reset_exec()
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{
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if (this_thread::has_executor())
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exec = this_thread::get_executor();
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}
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~reset_exec()
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{
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if (exec)
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this_thread::set_executor(*exec);
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}
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};
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reset_exec re;
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this_thread::set_executor(ctx.get_executor());
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f = spawn(ctx, std::move(t), asio::bind_executor(ctx.get_executor(), asio::use_future));
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ctx.run();
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}
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return f.get();
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}
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}
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#endif //BOOST_COBALT_RUN_HPP
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