boost/asio/detail/kqueue_reactor.hpp
// // detail/kqueue_reactor.hpp // ~~~~~~~~~~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2011 Christopher M. Kohlhoff (chris at kohlhoff dot com) // Copyright (c) 2005 Stefan Arentz (stefan at soze 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_KQUEUE_REACTOR_HPP #define BOOST_ASIO_DETAIL_KQUEUE_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_KQUEUE) #include <cstddef> #include <sys/types.h> #include <sys/event.h> #include <sys/time.h> #include <boost/asio/detail/kqueue_reactor_fwd.hpp> #include <boost/asio/detail/mutex.hpp> #include <boost/asio/detail/object_pool.hpp> #include <boost/asio/detail/op_queue.hpp> #include <boost/asio/detail/reactor_op.hpp> #include <boost/asio/detail/select_interrupter.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/error.hpp> #include <boost/asio/io_service.hpp> // Older versions of Mac OS X may not define EV_OOBAND. #if !defined(EV_OOBAND) # define EV_OOBAND EV_FLAG1 #endif // !defined(EV_OOBAND) #include <boost/asio/detail/push_options.hpp> namespace boost { namespace asio { namespace detail { class kqueue_reactor : public boost::asio::detail::service_base<kqueue_reactor> { public: enum op_types { read_op = 0, write_op = 1, connect_op = 1, except_op = 2, max_ops = 3 }; // Per-descriptor queues. struct descriptor_state { friend class kqueue_reactor; friend class object_pool_access; mutex mutex_; op_queue<reactor_op> op_queue_[max_ops]; bool shutdown_; descriptor_state* next_; descriptor_state* prev_; }; // Per-descriptor data. typedef descriptor_state* per_descriptor_data; // Constructor. BOOST_ASIO_DECL kqueue_reactor(boost::asio::io_service& io_service); // Destructor. BOOST_ASIO_DECL ~kqueue_reactor(); // Destroy all user-defined handler objects owned by the service. BOOST_ASIO_DECL void shutdown_service(); // Initialise the task. 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 descriptor, per_descriptor_data& 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& descriptor_data, reactor_op* op, bool allow_speculative); // 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& 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& 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 the kqueue loop. BOOST_ASIO_DECL void run(bool block, op_queue<operation>& ops); // Interrupt the kqueue loop. BOOST_ASIO_DECL void interrupt(); private: // Create the kqueue file descriptor. Throws an exception if the descriptor // cannot be created. BOOST_ASIO_DECL static int do_kqueue_create(); // 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 kevent call. BOOST_ASIO_DECL timespec* get_timeout(timespec& ts); // The io_service implementation used to post completions. io_service_impl& io_service_; // Mutex to protect access to internal data. mutex mutex_; // The kqueue file descriptor. int kqueue_fd_; // The interrupter is used to break a blocking kevent call. select_interrupter interrupter_; // The timer queues. timer_queue_set timer_queues_; // Whether the service has been shut down. bool shutdown_; // Mutex to protect access to the registered descriptors. mutex registered_descriptors_mutex_; // Keep track of all registered descriptors. object_pool<descriptor_state> registered_descriptors_; }; } // namespace detail } // namespace asio } // namespace boost #include <boost/asio/detail/pop_options.hpp> #include <boost/asio/detail/impl/kqueue_reactor.hpp> #if defined(BOOST_ASIO_HEADER_ONLY) # include <boost/asio/detail/impl/kqueue_reactor.ipp> #endif // defined(BOOST_ASIO_HEADER_ONLY) #endif // defined(BOOST_ASIO_HAS_KQUEUE) #endif // BOOST_ASIO_DETAIL_KQUEUE_REACTOR_HPP