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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_POLLER_BASE_HPP_INCLUDED__
-#define __ZMQ_POLLER_BASE_HPP_INCLUDED__
-
-#include <map>
-
-#include "clock.hpp"
-#include "atomic_counter.hpp"
-
-namespace zmq
-{
-
- struct i_poll_events;
-
- class poller_base_t
- {
- public:
-
- poller_base_t ();
- virtual ~poller_base_t ();
-
- // Returns load of the poller. Note that this function can be
- // invoked from a different thread!
- int get_load ();
-
- // Add a timeout to expire in timeout_ milliseconds. After the
- // expiration timer_event on sink_ object will be called with
- // argument set to id_.
- void add_timer (int timeout_, zmq::i_poll_events *sink_, int id_);
-
- // Cancel the timer created by sink_ object with ID equal to id_.
- void cancel_timer (zmq::i_poll_events *sink_, int id_);
-
- protected:
-
- // Called by individual poller implementations to manage the load.
- void adjust_load (int amount_);
-
- // Executes any timers that are due. Returns number of milliseconds
- // to wait to match the next timer or 0 meaning "no timers".
- uint64_t execute_timers ();
-
- private:
-
- // Clock instance private to this I/O thread.
- clock_t clock;
-
- // List of active timers.
- struct timer_info_t
- {
- zmq::i_poll_events *sink;
- int id;
- };
- typedef std::multimap <uint64_t, timer_info_t> timers_t;
- timers_t timers;
-
- // Load of the poller. Currently the number of file descriptors
- // registered.
- atomic_counter_t load;
-
- poller_base_t (const poller_base_t&);
- const poller_base_t &operator = (const poller_base_t&);
- };
-
-}
-
-#endif