67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
//
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// experimental/impl/use_promise.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2021-2023 Klemens D. Morgenstern
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// (klemens dot morgenstern at gmx dot net)
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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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#ifndef ASIO_EXPERIMENTAL_IMPL_USE_PROMISE_HPP
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#define ASIO_EXPERIMENTAL_IMPL_USE_PROMISE_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#include <memory>
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#include "asio/async_result.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace experimental {
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template <typename Allocator>
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struct use_promise_t;
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namespace detail {
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template<typename Signature, typename Executor, typename Allocator>
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struct promise_handler;
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} // namespace detail
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} // namespace experimental
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#if !defined(GENERATING_DOCUMENTATION)
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template <typename Allocator, typename R, typename... Args>
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struct async_result<experimental::use_promise_t<Allocator>, R(Args...)>
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{
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template <typename Initiation, typename... InitArgs>
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static auto initiate(Initiation initiation,
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experimental::use_promise_t<Allocator> up, InitArgs... args)
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-> experimental::promise<void(typename decay<Args>::type...),
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asio::associated_executor_t<Initiation>, Allocator>
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{
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using handler_type = experimental::detail::promise_handler<
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void(typename decay<Args>::type...),
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asio::associated_executor_t<Initiation>, Allocator>;
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handler_type ht{up.get_allocator(), get_associated_executor(initiation)};
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std::move(initiation)(ht, std::move(args)...);
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return ht.make_promise();
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}
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};
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#endif // !defined(GENERATING_DOCUMENTATION)
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#endif // ASIO_EXPERIMENTAL_IMPL_USE_PROMISE_HPP
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