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Diffstat (limited to 'src/epoll.hpp')
-rw-r--r-- | src/epoll.hpp | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/src/epoll.hpp b/src/epoll.hpp new file mode 100644 index 0000000..38175cb --- /dev/null +++ b/src/epoll.hpp @@ -0,0 +1,106 @@ +/* + Copyright (c) 2007-2010 iMatix Corporation + + This file is part of 0MQ. + + 0MQ is free software; you can redistribute it and/or modify it under + the terms of the Lesser GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + 0MQ is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + Lesser GNU General Public License for more details. + + You should have received a copy of the Lesser GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef __ZMQ_EPOLL_HPP_INCLUDED__ +#define __ZMQ_EPOLL_HPP_INCLUDED__ + +#include "platform.hpp" + +#ifdef ZMQ_HAVE_LINUX + +#include <vector> +#include <sys/epoll.h> + +#include "fd.hpp" +#include "thread.hpp" +#include "atomic_counter.hpp" + +namespace zmq +{ + + // This class implements socket polling mechanism using the Linux-specific + // epoll mechanism. + + class epoll_t + { + public: + + typedef void* handle_t; + + epoll_t (); + ~epoll_t (); + + // "poller" concept. + handle_t add_fd (fd_t fd_, struct i_poll_events *events_); + void rm_fd (handle_t handle_); + void set_pollin (handle_t handle_); + void reset_pollin (handle_t handle_); + void set_pollout (handle_t handle_); + void reset_pollout (handle_t handle_); + void add_timer (struct i_poll_events *events_); + void cancel_timer (struct i_poll_events *events_); + int get_load (); + void start (); + void stop (); + + private: + + // Main worker thread routine. + static void worker_routine (void *arg_); + + // Main event loop. + void loop (); + + // Main epoll file descriptor + fd_t epoll_fd; + + struct poll_entry_t + { + fd_t fd; + epoll_event ev; + struct i_poll_events *events; + }; + + // List of retired event sources. + typedef std::vector <poll_entry_t*> retired_t; + retired_t retired; + + // List of all the engines waiting for the timer event. + typedef std::vector <struct i_poll_events*> timers_t; + timers_t timers; + + // If true, thread is in the process of shutting down. + bool stopping; + + // Handle of the physical thread doing the I/O work. + thread_t worker; + + // Load of the poller. Currently number of file descriptors + // registered with the poller. + atomic_counter_t load; + + epoll_t (const epoll_t&); + void operator = (const epoll_t&); + }; + +} + +#endif + +#endif |