153 lines
3.6 KiB
C++
153 lines
3.6 KiB
C++
//
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// execution/detail/as_invocable.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_INVOCABLE_HPP
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#define ASIO_EXECUTION_DETAIL_AS_INVOCABLE_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/atomic_count.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/receiver_invocation_error.hpp"
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#include "asio/execution/set_done.hpp"
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#include "asio/execution/set_error.hpp"
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#include "asio/execution/set_value.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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#if defined(ASIO_HAS_MOVE)
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template <typename Receiver, typename>
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struct as_invocable
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{
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Receiver* receiver_;
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explicit as_invocable(Receiver& r) ASIO_NOEXCEPT
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: receiver_(asio::detail::addressof(r))
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{
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}
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as_invocable(as_invocable&& other) ASIO_NOEXCEPT
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: receiver_(other.receiver_)
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{
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other.receiver_ = 0;
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}
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~as_invocable()
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{
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if (receiver_)
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execution::set_done(ASIO_MOVE_OR_LVALUE(Receiver)(*receiver_));
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}
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void operator()() ASIO_LVALUE_REF_QUAL 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::set_value(ASIO_MOVE_CAST(Receiver)(*receiver_));
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receiver_ = 0;
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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(ASIO_MOVE_CAST(Receiver)(*receiver_),
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std::make_exception_ptr(receiver_invocation_error()));
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receiver_ = 0;
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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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#else // defined(ASIO_HAS_MOVE)
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template <typename Receiver, typename>
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struct as_invocable
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{
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Receiver* receiver_;
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asio::detail::shared_ptr<asio::detail::atomic_count> ref_count_;
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explicit as_invocable(Receiver& r,
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const asio::detail::shared_ptr<
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asio::detail::atomic_count>& c) ASIO_NOEXCEPT
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: receiver_(asio::detail::addressof(r)),
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ref_count_(c)
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{
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}
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as_invocable(const as_invocable& other) ASIO_NOEXCEPT
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: receiver_(other.receiver_),
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ref_count_(other.ref_count_)
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{
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++(*ref_count_);
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}
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~as_invocable()
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{
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if (--(*ref_count_) == 0)
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execution::set_done(*receiver_);
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}
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void operator()() ASIO_LVALUE_REF_QUAL 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::set_value(*receiver_);
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++(*ref_count_);
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}
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#if !defined(ASIO_NO_EXCEPTIONS)
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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(*receiver_,
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std::make_exception_ptr(receiver_invocation_error()));
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++(*ref_count_);
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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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#endif // defined(ASIO_HAS_MOVE)
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template <typename T>
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struct is_as_invocable : false_type
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{
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};
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template <typename Function, typename T>
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struct is_as_invocable<as_invocable<Function, T> > : true_type
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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 asio
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#include "asio/detail/pop_options.hpp"
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#endif // ASIO_EXECUTION_DETAIL_AS_INVOCABLE_HPP
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