88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
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//
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// detail/impl/strand_service.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2023 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_DETAIL_IMPL_STRAND_SERVICE_HPP
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#define ASIO_DETAIL_IMPL_STRAND_SERVICE_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/completion_handler.hpp"
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#include "asio/detail/fenced_block.hpp"
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#include "asio/detail/handler_alloc_helpers.hpp"
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#include "asio/detail/handler_invoke_helpers.hpp"
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#include "asio/detail/memory.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace detail {
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inline strand_service::strand_impl::strand_impl()
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: operation(&strand_service::do_complete),
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locked_(false)
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{
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}
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template <typename Handler>
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void strand_service::dispatch(strand_service::implementation_type& impl,
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Handler& handler)
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{
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// If we are already in the strand then the handler can run immediately.
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if (running_in_this_thread(impl))
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{
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fenced_block b(fenced_block::full);
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asio_handler_invoke_helpers::invoke(handler, handler);
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return;
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}
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// Allocate and construct an operation to wrap the handler.
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typedef completion_handler<Handler, io_context::executor_type> op;
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typename op::ptr p = { asio::detail::addressof(handler),
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op::ptr::allocate(handler), 0 };
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p.p = new (p.v) op(handler, io_context_.get_executor());
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ASIO_HANDLER_CREATION((this->context(),
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*p.p, "strand", impl, 0, "dispatch"));
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operation* o = p.p;
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p.v = p.p = 0;
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do_dispatch(impl, o);
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}
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// Request the io_context to invoke the given handler and return immediately.
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template <typename Handler>
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void strand_service::post(strand_service::implementation_type& impl,
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Handler& handler)
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{
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bool is_continuation =
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asio_handler_cont_helpers::is_continuation(handler);
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// Allocate and construct an operation to wrap the handler.
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typedef completion_handler<Handler, io_context::executor_type> op;
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typename op::ptr p = { asio::detail::addressof(handler),
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op::ptr::allocate(handler), 0 };
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p.p = new (p.v) op(handler, io_context_.get_executor());
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ASIO_HANDLER_CREATION((this->context(),
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*p.p, "strand", impl, 0, "post"));
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do_post(impl, p.p, is_continuation);
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p.v = p.p = 0;
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}
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} // namespace detail
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#endif // ASIO_DETAIL_IMPL_STRAND_SERVICE_HPP
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