| // |
| // detail/select_reactor.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2010 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_DETAIL_SELECT_REACTOR_HPP |
| #define BOOST_ASIO_DETAIL_SELECT_REACTOR_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include <boost/asio/detail/config.hpp> |
| |
| #if defined(BOOST_ASIO_HAS_IOCP) \ |
| || (!defined(BOOST_ASIO_HAS_DEV_POLL) \ |
| && !defined(BOOST_ASIO_HAS_EPOLL) \ |
| && !defined(BOOST_ASIO_HAS_KQUEUE)) |
| |
| #include <cstddef> |
| #include <boost/asio/detail/mutex.hpp> |
| #include <boost/asio/detail/op_queue.hpp> |
| #include <boost/asio/detail/reactor_op.hpp> |
| #include <boost/asio/detail/reactor_op_queue.hpp> |
| #include <boost/asio/detail/select_interrupter.hpp> |
| #include <boost/asio/detail/select_reactor_fwd.hpp> |
| #include <boost/asio/detail/socket_types.hpp> |
| #include <boost/asio/detail/timer_op.hpp> |
| #include <boost/asio/detail/timer_queue_base.hpp> |
| #include <boost/asio/detail/timer_queue_fwd.hpp> |
| #include <boost/asio/detail/timer_queue_set.hpp> |
| #include <boost/asio/io_service.hpp> |
| |
| #if defined(BOOST_ASIO_HAS_IOCP) |
| # include <boost/asio/detail/thread.hpp> |
| #endif // defined(BOOST_ASIO_HAS_IOCP) |
| |
| #include <boost/asio/detail/push_options.hpp> |
| |
| namespace boost { |
| namespace asio { |
| namespace detail { |
| |
| class select_reactor |
| : public boost::asio::detail::service_base<select_reactor> |
| { |
| public: |
| #if defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| enum { read_op = 0, write_op = 1, except_op = 2, |
| max_select_ops = 3, connect_op = 3, max_ops = 4 }; |
| #else // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| enum { read_op = 0, write_op = 1, except_op = 2, |
| max_select_ops = 3, connect_op = 1, max_ops = 3 }; |
| #endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| |
| // Per-descriptor data. |
| struct per_descriptor_data |
| { |
| }; |
| |
| // Constructor. |
| BOOST_ASIO_DECL select_reactor(boost::asio::io_service& io_service); |
| |
| // Destructor. |
| BOOST_ASIO_DECL ~select_reactor(); |
| |
| // Destroy all user-defined handler objects owned by the service. |
| BOOST_ASIO_DECL void shutdown_service(); |
| |
| // Initialise the task, but only if the reactor is not in its own thread. |
| BOOST_ASIO_DECL void init_task(); |
| |
| // Register a socket with the reactor. Returns 0 on success, system error |
| // code on failure. |
| BOOST_ASIO_DECL int register_descriptor(socket_type, per_descriptor_data&); |
| |
| // Post a reactor operation for immediate completion. |
| void post_immediate_completion(reactor_op* op) |
| { |
| io_service_.post_immediate_completion(op); |
| } |
| |
| // Start a new operation. The reactor operation will be performed when the |
| // given descriptor is flagged as ready, or an error has occurred. |
| BOOST_ASIO_DECL void start_op(int op_type, socket_type descriptor, |
| per_descriptor_data&, reactor_op* op, bool); |
| |
| // Cancel all operations associated with the given descriptor. The |
| // handlers associated with the descriptor will be invoked with the |
| // operation_aborted error. |
| BOOST_ASIO_DECL void cancel_ops(socket_type descriptor, per_descriptor_data&); |
| |
| // Cancel any operations that are running against the descriptor and remove |
| // its registration from the reactor. |
| BOOST_ASIO_DECL void close_descriptor(socket_type descriptor, |
| per_descriptor_data&); |
| |
| // Add a new timer queue to the reactor. |
| template <typename Time_Traits> |
| void add_timer_queue(timer_queue<Time_Traits>& queue); |
| |
| // Remove a timer queue from the reactor. |
| template <typename Time_Traits> |
| void remove_timer_queue(timer_queue<Time_Traits>& queue); |
| |
| // Schedule a new operation in the given timer queue to expire at the |
| // specified absolute time. |
| template <typename Time_Traits> |
| void schedule_timer(timer_queue<Time_Traits>& queue, |
| const typename Time_Traits::time_type& time, |
| typename timer_queue<Time_Traits>::per_timer_data& timer, timer_op* op); |
| |
| // Cancel the timer operations associated with the given token. Returns the |
| // number of operations that have been posted or dispatched. |
| template <typename Time_Traits> |
| std::size_t cancel_timer(timer_queue<Time_Traits>& queue, |
| typename timer_queue<Time_Traits>::per_timer_data& timer); |
| |
| // Run select once until interrupted or events are ready to be dispatched. |
| BOOST_ASIO_DECL void run(bool block, op_queue<operation>& ops); |
| |
| // Interrupt the select loop. |
| BOOST_ASIO_DECL void interrupt(); |
| |
| private: |
| #if defined(BOOST_ASIO_HAS_IOCP) |
| // Run the select loop in the thread. |
| BOOST_ASIO_DECL void run_thread(); |
| |
| // Entry point for the select loop thread. |
| BOOST_ASIO_DECL static void call_run_thread(select_reactor* reactor); |
| #endif // defined(BOOST_ASIO_HAS_IOCP) |
| |
| // Helper function to add a new timer queue. |
| BOOST_ASIO_DECL void do_add_timer_queue(timer_queue_base& queue); |
| |
| // Helper function to remove a timer queue. |
| BOOST_ASIO_DECL void do_remove_timer_queue(timer_queue_base& queue); |
| |
| // Get the timeout value for the select call. |
| BOOST_ASIO_DECL timeval* get_timeout(timeval& tv); |
| |
| // Cancel all operations associated with the given descriptor. This function |
| // does not acquire the select_reactor's mutex. |
| BOOST_ASIO_DECL void cancel_ops_unlocked(socket_type descriptor, |
| const boost::system::error_code& ec); |
| |
| // The io_service implementation used to post completions. |
| io_service_impl& io_service_; |
| |
| // Mutex to protect access to internal data. |
| boost::asio::detail::mutex mutex_; |
| |
| // The interrupter is used to break a blocking select call. |
| select_interrupter interrupter_; |
| |
| // The queues of read, write and except operations. |
| reactor_op_queue<socket_type> op_queue_[max_ops]; |
| |
| // The timer queues. |
| timer_queue_set timer_queues_; |
| |
| #if defined(BOOST_ASIO_HAS_IOCP) |
| // Does the reactor loop thread need to stop. |
| bool stop_thread_; |
| |
| // The thread that is running the reactor loop. |
| boost::asio::detail::thread* thread_; |
| #endif // defined(BOOST_ASIO_HAS_IOCP) |
| |
| // Whether the service has been shut down. |
| bool shutdown_; |
| }; |
| |
| } // namespace detail |
| } // namespace asio |
| } // namespace boost |
| |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #include <boost/asio/detail/impl/select_reactor.hpp> |
| #if defined(BOOST_ASIO_HEADER_ONLY) |
| # include <boost/asio/detail/impl/select_reactor.ipp> |
| #endif // defined(BOOST_ASIO_HEADER_ONLY) |
| |
| #endif // defined(BOOST_ASIO_HAS_IOCP) |
| // || (!defined(BOOST_ASIO_HAS_DEV_POLL) |
| // && !defined(BOOST_ASIO_HAS_EPOLL) |
| // && !defined(BOOST_ASIO_HAS_KQUEUE)) |
| |
| #endif // BOOST_ASIO_DETAIL_SELECT_REACTOR_HPP |