154 lines
4.1 KiB
C++
Executable File
154 lines
4.1 KiB
C++
Executable File
//
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// detail/work_dispatcher.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2022 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 BOOST_ASIO_DETAIL_WORK_DISPATCHER_HPP
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#define BOOST_ASIO_DETAIL_WORK_DISPATCHER_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 <boost/asio/detail/config.hpp>
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#include <boost/asio/detail/bind_handler.hpp>
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#include <boost/asio/detail/type_traits.hpp>
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#include <boost/asio/associated_executor.hpp>
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#include <boost/asio/associated_allocator.hpp>
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#include <boost/asio/executor_work_guard.hpp>
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#include <boost/asio/execution/executor.hpp>
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#include <boost/asio/execution/allocator.hpp>
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#include <boost/asio/execution/blocking.hpp>
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#include <boost/asio/execution/outstanding_work.hpp>
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#include <boost/asio/prefer.hpp>
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#include <boost/asio/detail/push_options.hpp>
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namespace boost {
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namespace asio {
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namespace detail {
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template <typename Handler, typename Executor, typename = void>
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struct is_work_dispatcher_required : true_type
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{
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};
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template <typename Handler, typename Executor>
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struct is_work_dispatcher_required<Handler, Executor,
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typename enable_if<
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is_same<
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typename associated_executor<Handler,
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Executor>::asio_associated_executor_is_unspecialised,
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void
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>::value
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>::type> : false_type
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{
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};
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template <typename Handler, typename Executor, typename = void>
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class work_dispatcher
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{
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public:
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template <typename CompletionHandler>
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work_dispatcher(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
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const Executor& handler_ex)
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: handler_(BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler)),
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executor_(boost::asio::prefer(handler_ex,
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execution::outstanding_work.tracked))
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{
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}
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#if defined(BOOST_ASIO_HAS_MOVE)
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work_dispatcher(const work_dispatcher& other)
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: handler_(other.handler_),
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executor_(other.executor_)
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{
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}
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work_dispatcher(work_dispatcher&& other)
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: handler_(BOOST_ASIO_MOVE_CAST(Handler)(other.handler_)),
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executor_(BOOST_ASIO_MOVE_CAST(work_executor_type)(other.executor_))
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{
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}
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#endif // defined(BOOST_ASIO_HAS_MOVE)
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void operator()()
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{
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execution::execute(
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boost::asio::prefer(executor_,
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execution::blocking.possibly,
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execution::allocator((get_associated_allocator)(handler_))),
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boost::asio::detail::bind_handler(
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BOOST_ASIO_MOVE_CAST(Handler)(handler_)));
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}
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private:
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typedef typename decay<
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typename prefer_result<const Executor&,
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execution::outstanding_work_t::tracked_t
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>::type
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>::type work_executor_type;
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Handler handler_;
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work_executor_type executor_;
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};
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#if !defined(BOOST_ASIO_NO_TS_EXECUTORS)
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template <typename Handler, typename Executor>
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class work_dispatcher<Handler, Executor,
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typename enable_if<!execution::is_executor<Executor>::value>::type>
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{
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public:
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template <typename CompletionHandler>
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work_dispatcher(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
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const Executor& handler_ex)
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: work_(handler_ex),
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handler_(BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler))
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{
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}
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#if defined(BOOST_ASIO_HAS_MOVE)
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work_dispatcher(const work_dispatcher& other)
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: work_(other.work_),
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handler_(other.handler_)
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{
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}
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work_dispatcher(work_dispatcher&& other)
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: work_(BOOST_ASIO_MOVE_CAST(executor_work_guard<Executor>)(other.work_)),
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handler_(BOOST_ASIO_MOVE_CAST(Handler)(other.handler_))
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{
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}
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#endif // defined(BOOST_ASIO_HAS_MOVE)
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void operator()()
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{
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typename associated_allocator<Handler>::type alloc(
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(get_associated_allocator)(handler_));
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work_.get_executor().dispatch(
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boost::asio::detail::bind_handler(
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BOOST_ASIO_MOVE_CAST(Handler)(handler_)), alloc);
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work_.reset();
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}
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private:
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executor_work_guard<Executor> work_;
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Handler handler_;
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};
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#endif // !defined(BOOST_ASIO_NO_TS_EXECUTORS)
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} // namespace detail
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} // namespace asio
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} // namespace boost
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#include <boost/asio/detail/pop_options.hpp>
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#endif // BOOST_ASIO_DETAIL_WORK_DISPATCHER_HPP
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