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Diffstat (limited to 'src/devpoll.hpp')
-rw-r--r-- | src/devpoll.hpp | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/src/devpoll.hpp b/src/devpoll.hpp new file mode 100644 index 0000000..fbf9328 --- /dev/null +++ b/src/devpoll.hpp @@ -0,0 +1,105 @@ +/* + Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file + + This file is part of 0MQ. + + 0MQ is free software; you can redistribute it and/or modify it under + the terms of the GNU Lesser 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 + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef __ZMQ_DEVPOLL_HPP_INCLUDED__ +#define __ZMQ_DEVPOLL_HPP_INCLUDED__ + +// poller.hpp decides which polling mechanism to use. +#include "poller.hpp" +#if defined ZMQ_USE_DEVPOLL + +#include <vector> + +#include "fd.hpp" +#include "thread.hpp" +#include "poller_base.hpp" + +namespace zmq +{ + + struct i_poll_events; + + // Implements socket polling mechanism using the "/dev/poll" interface. + + class devpoll_t : public poller_base_t + { + public: + + typedef fd_t handle_t; + + devpoll_t (); + ~devpoll_t (); + + // "poller" concept. + handle_t add_fd (fd_t fd_, zmq::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 start (); + void stop (); + + static int max_fds (); + + private: + + // Main worker thread routine. + static void worker_routine (void *arg_); + + // Main event loop. + void loop (); + + // File descriptor referring to "/dev/poll" pseudo-device. + fd_t devpoll_fd; + + struct fd_entry_t + { + short events; + zmq::i_poll_events *reactor; + bool valid; + bool accepted; + }; + + typedef std::vector <fd_entry_t> fd_table_t; + fd_table_t fd_table; + + typedef std::vector <fd_t> pending_list_t; + pending_list_t pending_list; + + // Pollset manipulation function. + void devpoll_ctl (fd_t fd_, short events_); + + // 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; + + devpoll_t (const devpoll_t&); + const devpoll_t &operator = (const devpoll_t&); + }; + + typedef devpoll_t poller_t; + +} + +#endif + +#endif |