108 lines
2.6 KiB
C++
108 lines
2.6 KiB
C++
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//
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// detail/blocking_executor_op.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_DETAIL_BLOCKING_EXECUTOR_OP_HPP
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#define ASIO_DETAIL_BLOCKING_EXECUTOR_OP_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/event.hpp"
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#include "asio/detail/fenced_block.hpp"
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#include "asio/detail/handler_invoke_helpers.hpp"
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#include "asio/detail/mutex.hpp"
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#include "asio/detail/scheduler_operation.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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template <typename Operation = scheduler_operation>
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class blocking_executor_op_base : public Operation
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{
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public:
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blocking_executor_op_base(typename Operation::func_type complete_func)
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: Operation(complete_func),
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is_complete_(false)
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{
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}
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void wait()
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{
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asio::detail::mutex::scoped_lock lock(mutex_);
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while (!is_complete_)
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event_.wait(lock);
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}
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protected:
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struct do_complete_cleanup
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{
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~do_complete_cleanup()
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{
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asio::detail::mutex::scoped_lock lock(op_->mutex_);
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op_->is_complete_ = true;
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op_->event_.unlock_and_signal_one_for_destruction(lock);
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}
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blocking_executor_op_base* op_;
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};
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private:
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asio::detail::mutex mutex_;
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asio::detail::event event_;
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bool is_complete_;
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};
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template <typename Handler, typename Operation = scheduler_operation>
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class blocking_executor_op : public blocking_executor_op_base<Operation>
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{
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public:
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blocking_executor_op(Handler& h)
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: blocking_executor_op_base<Operation>(&blocking_executor_op::do_complete),
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handler_(h)
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{
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}
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static void do_complete(void* owner, Operation* base,
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const asio::error_code& /*ec*/,
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std::size_t /*bytes_transferred*/)
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{
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blocking_executor_op* o(static_cast<blocking_executor_op*>(base));
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typename blocking_executor_op_base<Operation>::do_complete_cleanup
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on_exit = { o };
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(void)on_exit;
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ASIO_HANDLER_COMPLETION((*o));
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// Make the upcall if required.
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if (owner)
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{
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fenced_block b(fenced_block::half);
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ASIO_HANDLER_INVOCATION_BEGIN(());
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asio_handler_invoke_helpers::invoke(o->handler_, o->handler_);
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ASIO_HANDLER_INVOCATION_END;
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}
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}
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private:
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Handler& handler_;
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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_BLOCKING_EXECUTOR_OP_HPP
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