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- //
- // execution/detail/as_operation.hpp
- // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- //
- // Copyright (c) 2003-2021 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)
- //
- #ifndef BOOST_ASIO_EXECUTION_DETAIL_AS_OPERATION_HPP
- #define BOOST_ASIO_EXECUTION_DETAIL_AS_OPERATION_HPP
- #if defined(_MSC_VER) && (_MSC_VER >= 1200)
- # pragma once
- #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
- #include <boost/asio/detail/config.hpp>
- #include <boost/asio/detail/memory.hpp>
- #include <boost/asio/detail/type_traits.hpp>
- #include <boost/asio/execution/detail/as_invocable.hpp>
- #include <boost/asio/execution/execute.hpp>
- #include <boost/asio/execution/set_error.hpp>
- #include <boost/asio/traits/start_member.hpp>
- #include <boost/asio/detail/push_options.hpp>
- namespace boost {
- namespace asio {
- namespace execution {
- namespace detail {
- template <typename Executor, typename Receiver>
- struct as_operation
- {
- typename remove_cvref<Executor>::type ex_;
- typename remove_cvref<Receiver>::type receiver_;
- #if !defined(BOOST_ASIO_HAS_MOVE)
- boost::asio::detail::shared_ptr<boost::asio::detail::atomic_count> ref_count_;
- #endif // !defined(BOOST_ASIO_HAS_MOVE)
- template <typename E, typename R>
- explicit as_operation(BOOST_ASIO_MOVE_ARG(E) e, BOOST_ASIO_MOVE_ARG(R) r)
- : ex_(BOOST_ASIO_MOVE_CAST(E)(e)),
- receiver_(BOOST_ASIO_MOVE_CAST(R)(r))
- #if !defined(BOOST_ASIO_HAS_MOVE)
- , ref_count_(new boost::asio::detail::atomic_count(1))
- #endif // !defined(BOOST_ASIO_HAS_MOVE)
- {
- }
- void start() BOOST_ASIO_NOEXCEPT
- {
- #if !defined(BOOST_ASIO_NO_EXCEPTIONS)
- try
- {
- #endif // !defined(BOOST_ASIO_NO_EXCEPTIONS)
- execution::execute(
- BOOST_ASIO_MOVE_CAST(typename remove_cvref<Executor>::type)(ex_),
- as_invocable<typename remove_cvref<Receiver>::type,
- Executor>(receiver_
- #if !defined(BOOST_ASIO_HAS_MOVE)
- , ref_count_
- #endif // !defined(BOOST_ASIO_HAS_MOVE)
- ));
- #if !defined(BOOST_ASIO_NO_EXCEPTIONS)
- }
- catch (...)
- {
- #if defined(BOOST_ASIO_HAS_STD_EXCEPTION_PTR)
- execution::set_error(
- BOOST_ASIO_MOVE_OR_LVALUE(
- typename remove_cvref<Receiver>::type)(
- receiver_),
- std::current_exception());
- #else // defined(BOOST_ASIO_HAS_STD_EXCEPTION_PTR)
- std::terminate();
- #endif // defined(BOOST_ASIO_HAS_STD_EXCEPTION_PTR)
- }
- #endif // !defined(BOOST_ASIO_NO_EXCEPTIONS)
- }
- };
- } // namespace detail
- } // namespace execution
- namespace traits {
- #if !defined(BOOST_ASIO_HAS_DEDUCED_START_MEMBER_TRAIT)
- template <typename Executor, typename Receiver>
- struct start_member<
- boost::asio::execution::detail::as_operation<Executor, Receiver> >
- {
- BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
- BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
- typedef void result_type;
- };
- #endif // !defined(BOOST_ASIO_HAS_DEDUCED_START_MEMBER_TRAIT)
- } // namespace traits
- } // namespace asio
- } // namespace boost
- #include <boost/asio/detail/pop_options.hpp>
- #endif // BOOST_ASIO_EXECUTION_DETAIL_AS_OPERATION_HPP
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