106 lines
2.9 KiB
C++
106 lines
2.9 KiB
C++
//
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// execution/detail/as_operation.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2021 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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#ifndef ASIO_EXECUTION_DETAIL_AS_OPERATION_HPP
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#define ASIO_EXECUTION_DETAIL_AS_OPERATION_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 "asio/detail/memory.hpp"
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#include "asio/detail/type_traits.hpp"
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#include "asio/execution/detail/as_invocable.hpp"
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#include "asio/execution/execute.hpp"
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#include "asio/execution/set_error.hpp"
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#include "asio/traits/start_member.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace execution {
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namespace detail {
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template <typename Executor, typename Receiver>
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struct as_operation
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{
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typename remove_cvref<Executor>::type ex_;
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typename remove_cvref<Receiver>::type receiver_;
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#if !defined(ASIO_HAS_MOVE)
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asio::detail::shared_ptr<asio::detail::atomic_count> ref_count_;
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#endif // !defined(ASIO_HAS_MOVE)
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template <typename E, typename R>
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explicit as_operation(ASIO_MOVE_ARG(E) e, ASIO_MOVE_ARG(R) r)
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: ex_(ASIO_MOVE_CAST(E)(e)),
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receiver_(ASIO_MOVE_CAST(R)(r))
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#if !defined(ASIO_HAS_MOVE)
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, ref_count_(new asio::detail::atomic_count(1))
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#endif // !defined(ASIO_HAS_MOVE)
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{
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}
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void start() ASIO_NOEXCEPT
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{
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#if !defined(ASIO_NO_EXCEPTIONS)
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try
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{
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#endif // !defined(ASIO_NO_EXCEPTIONS)
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execution::execute(
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ASIO_MOVE_CAST(typename remove_cvref<Executor>::type)(ex_),
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as_invocable<typename remove_cvref<Receiver>::type,
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Executor>(receiver_
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#if !defined(ASIO_HAS_MOVE)
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, ref_count_
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#endif // !defined(ASIO_HAS_MOVE)
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));
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#if !defined(ASIO_NO_EXCEPTIONS)
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}
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catch (...)
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{
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#if defined(ASIO_HAS_STD_EXCEPTION_PTR)
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execution::set_error(
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ASIO_MOVE_OR_LVALUE(
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typename remove_cvref<Receiver>::type)(
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receiver_),
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std::current_exception());
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#else // defined(ASIO_HAS_STD_EXCEPTION_PTR)
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std::terminate();
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#endif // defined(ASIO_HAS_STD_EXCEPTION_PTR)
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}
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#endif // !defined(ASIO_NO_EXCEPTIONS)
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}
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};
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} // namespace detail
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} // namespace execution
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namespace traits {
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#if !defined(ASIO_HAS_DEDUCED_START_MEMBER_TRAIT)
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template <typename Executor, typename Receiver>
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struct start_member<
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asio::execution::detail::as_operation<Executor, Receiver> >
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{
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ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
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ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
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typedef void result_type;
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};
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#endif // !defined(ASIO_HAS_DEDUCED_START_MEMBER_TRAIT)
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} // namespace traits
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#endif // ASIO_EXECUTION_DETAIL_AS_OPERATION_HPP
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