| // |
| // execution/detail/as_invocable.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_INVOCABLE_HPP |
| #define BOOST_ASIO_EXECUTION_DETAIL_AS_INVOCABLE_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/atomic_count.hpp> |
| #include <boost/asio/detail/memory.hpp> |
| #include <boost/asio/detail/type_traits.hpp> |
| #include <boost/asio/execution/receiver_invocation_error.hpp> |
| #include <boost/asio/execution/set_done.hpp> |
| #include <boost/asio/execution/set_error.hpp> |
| #include <boost/asio/execution/set_value.hpp> |
| |
| #include <boost/asio/detail/push_options.hpp> |
| |
| namespace boost { |
| namespace asio { |
| namespace execution { |
| namespace detail { |
| |
| #if defined(BOOST_ASIO_HAS_MOVE) |
| |
| template <typename Receiver, typename> |
| struct as_invocable |
| { |
| Receiver* receiver_; |
| |
| explicit as_invocable(Receiver& r) BOOST_ASIO_NOEXCEPT |
| : receiver_(boost::asio::detail::addressof(r)) |
| { |
| } |
| |
| as_invocable(as_invocable&& other) BOOST_ASIO_NOEXCEPT |
| : receiver_(other.receiver_) |
| { |
| other.receiver_ = 0; |
| } |
| |
| ~as_invocable() |
| { |
| if (receiver_) |
| execution::set_done(BOOST_ASIO_MOVE_OR_LVALUE(Receiver)(*receiver_)); |
| } |
| |
| void operator()() BOOST_ASIO_LVALUE_REF_QUAL BOOST_ASIO_NOEXCEPT |
| { |
| #if !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| try |
| { |
| #endif // !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| execution::set_value(BOOST_ASIO_MOVE_CAST(Receiver)(*receiver_)); |
| receiver_ = 0; |
| #if !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| } |
| catch (...) |
| { |
| #if defined(BOOST_ASIO_HAS_STD_EXCEPTION_PTR) |
| execution::set_error(BOOST_ASIO_MOVE_CAST(Receiver)(*receiver_), |
| std::make_exception_ptr(receiver_invocation_error())); |
| receiver_ = 0; |
| #else // defined(BOOST_ASIO_HAS_STD_EXCEPTION_PTR) |
| std::terminate(); |
| #endif // defined(BOOST_ASIO_HAS_STD_EXCEPTION_PTR) |
| } |
| #endif // !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| } |
| }; |
| |
| #else // defined(BOOST_ASIO_HAS_MOVE) |
| |
| template <typename Receiver, typename> |
| struct as_invocable |
| { |
| Receiver* receiver_; |
| boost::asio::detail::shared_ptr<boost::asio::detail::atomic_count> ref_count_; |
| |
| explicit as_invocable(Receiver& r, |
| const boost::asio::detail::shared_ptr< |
| boost::asio::detail::atomic_count>& c) BOOST_ASIO_NOEXCEPT |
| : receiver_(boost::asio::detail::addressof(r)), |
| ref_count_(c) |
| { |
| } |
| |
| as_invocable(const as_invocable& other) BOOST_ASIO_NOEXCEPT |
| : receiver_(other.receiver_), |
| ref_count_(other.ref_count_) |
| { |
| ++(*ref_count_); |
| } |
| |
| ~as_invocable() |
| { |
| if (--(*ref_count_) == 0) |
| execution::set_done(*receiver_); |
| } |
| |
| void operator()() BOOST_ASIO_LVALUE_REF_QUAL BOOST_ASIO_NOEXCEPT |
| { |
| #if !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| try |
| { |
| #endif // !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| execution::set_value(*receiver_); |
| ++(*ref_count_); |
| } |
| #if !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| catch (...) |
| { |
| #if defined(BOOST_ASIO_HAS_STD_EXCEPTION_PTR) |
| execution::set_error(*receiver_, |
| std::make_exception_ptr(receiver_invocation_error())); |
| ++(*ref_count_); |
| #else // defined(BOOST_ASIO_HAS_STD_EXCEPTION_PTR) |
| std::terminate(); |
| #endif // defined(BOOST_ASIO_HAS_STD_EXCEPTION_PTR) |
| } |
| #endif // !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| } |
| }; |
| |
| #endif // defined(BOOST_ASIO_HAS_MOVE) |
| |
| template <typename T> |
| struct is_as_invocable : false_type |
| { |
| }; |
| |
| template <typename Function, typename T> |
| struct is_as_invocable<as_invocable<Function, T> > : true_type |
| { |
| }; |
| |
| } // namespace detail |
| } // namespace execution |
| } // namespace asio |
| } // namespace boost |
| |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #endif // BOOST_ASIO_EXECUTION_DETAIL_AS_INVOCABLE_HPP |