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Diffstat (limited to 'boost/asio/detail/select_reactor.hpp')
-rw-r--r-- | boost/asio/detail/select_reactor.hpp | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/boost/asio/detail/select_reactor.hpp b/boost/asio/detail/select_reactor.hpp new file mode 100644 index 0000000000..a434546cb1 --- /dev/null +++ b/boost/asio/detail/select_reactor.hpp @@ -0,0 +1,221 @@ +// +// detail/select_reactor.hpp +// ~~~~~~~~~~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2012 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 <boost/limits.hpp> +#include <cstddef> +#include <boost/asio/detail/fd_set_adapter.hpp> +#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_queue_base.hpp> +#include <boost/asio/detail/timer_queue_fwd.hpp> +#include <boost/asio/detail/timer_queue_set.hpp> +#include <boost/asio/detail/wait_op.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 op_types { 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 op_types { 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(); + + // Recreate internal descriptors following a fork. + BOOST_ASIO_DECL void fork_service( + boost::asio::io_service::fork_event fork_ev); + + // 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&); + + // Register a descriptor with an associated single operation. Returns 0 on + // success, system error code on failure. + BOOST_ASIO_DECL int register_internal_descriptor( + int op_type, socket_type descriptor, + per_descriptor_data& descriptor_data, reactor_op* op); + + // 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 deregister_descriptor(socket_type descriptor, + per_descriptor_data&, bool closing); + + // Remote the descriptor's registration from the reactor. + BOOST_ASIO_DECL void deregister_internal_descriptor( + socket_type descriptor, per_descriptor_data& descriptor_data); + + // Move descriptor registration from one descriptor_data object to another. + BOOST_ASIO_DECL void move_descriptor(socket_type descriptor, + per_descriptor_data& target_descriptor_data, + per_descriptor_data& source_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, wait_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, + std::size_t max_cancelled = (std::numeric_limits<std::size_t>::max)()); + + // 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 file descriptor sets to be passed to the select system call. + fd_set_adapter fd_sets_[max_select_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 |