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/*
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
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