| // |
| // 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 |