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114 lines
3.0 KiB
114 lines
3.0 KiB
/*
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* Copyright (C) 2011 Stefan Sayer
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*
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* This file is part of SEMS, a free SIP media server.
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*
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* SEMS is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* For a license to use the sems software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* SEMS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _RegistrationTimer_h_
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#define _RegistrationTimer_h_
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#include <list>
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#include <vector>
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#include <sys/time.h>
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#include "log.h"
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#include "AmThread.h"
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#define TIMER_BUCKET_LENGTH 10 // 10 sec
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#define TIMER_BUCKETS 40000 // 40000 buckets (400000 sec, 111 hrs)
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// 100 ms == 100000 us
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#define TIMER_RESOLUTION 100000
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class RegTimer;
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typedef void (*timer_cb)(RegTimer*, long /*data1*/,int /*data2*/);
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class RegTimerBucket;
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class RegTimer {
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public:
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time_t expires;
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timer_cb cb;
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long data1;
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int data2;
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RegTimer()
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: expires(0), cb(0), data1(0), data2(0) { }
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};
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class RegTimerBucket {
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public:
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std::list<RegTimer*> timers;
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RegTimerBucket() { }
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};
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/**
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Additionally to normal timer operation (setting and removing timer,
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fire the timer when it is expired), this RegistrationTimer timers
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class needs to support insert_timer_leastloaded() which should insert
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the timer in some least loaded interval between from_time and to_time
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in order to flatten out re-register spikes (due to restart etc).
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Timer granularity is seconds.
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Timers are saved in buckets of TIMER_BUCKET_LENGTH seconds. the buckets
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array is a circular one, the current bucket starts from the time
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current_bucket_start (in seconds as in time(2)).
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The timer object is owned by the caller, and MUST be valid until it is
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fired or removed.
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*/
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class RegistrationTimer
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: public AmThread
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{
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time_t current_bucket_start;
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// every bucket contains TIMER_BUCKET_LENGTH seconds of timers
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RegTimerBucket buckets[TIMER_BUCKETS];
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unsigned int current_bucket;
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AmMutex buckets_mut;
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int get_bucket_index(time_t tv);
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void place_timer(RegTimer* timer, int bucket_index);
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void fire_timer(RegTimer* timer);
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void run_timers();
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protected:
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void run();
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void on_stop();
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public:
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bool insert_timer(RegTimer* timer);
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bool remove_timer(RegTimer* timer);
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bool insert_timer_leastloaded(RegTimer* timer,
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time_t from_time,
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time_t to_time);
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RegistrationTimer();
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};
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#endif
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