mirror of https://github.com/Icinga/icinga2.git
158 lines
3.8 KiB
C++
158 lines
3.8 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program 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 Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "i2-base.h"
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using namespace icinga;
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Timer::CollectionType Timer::m_Timers;
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/**
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* Constructor for the Timer class.
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*/
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Timer::Timer(void)
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: m_Interval(0)
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{ }
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/**
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* Calls expired timers and returned when the next wake-up should happen.
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*
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* @returns Time when the next timer is due.
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*/
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double Timer::ProcessTimers(void)
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{
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double wakeup = 30;
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double st = Utility::GetTime();
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Timer::CollectionType::iterator prev, i;
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for (i = m_Timers.begin(); i != m_Timers.end(); ) {
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Timer::Ptr timer = i->lock();
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prev = i;
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i++;
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if (!timer) {
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m_Timers.erase(prev);
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continue;
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}
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double now = Utility::GetTime();
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if (timer->m_Next <= now) {
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timer->Call();
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/* time may have changed depending on how long the
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* timer call took - we need to fetch the current time */
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now = Utility::GetTime();
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timer->Reschedule(now + timer->GetInterval());
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}
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assert(timer->m_Next > now);
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if (timer->m_Next - now < wakeup)
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wakeup = timer->m_Next - now;
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}
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assert(wakeup > 0);
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double et = Utility::GetTime();
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stringstream msgbuf;
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msgbuf << "Timers took " << et - st << " seconds";
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Logger::Write(LogDebug, "base", msgbuf.str());
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return wakeup;
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}
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/**
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* Calls this timer. Note: the timer delegate must not call
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* Disable() on any other timers than the timer that originally
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* invoked the delegate.
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*/
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void Timer::Call(void)
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{
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double st = Utility::GetTime();
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OnTimerExpired(GetSelf());
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double et = Utility::GetTime();
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if (et - st > 1.0) {
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stringstream msgbuf;
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msgbuf << "Timer call took " << et - st << " seconds.";
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Logger::Write(LogWarning, "base", msgbuf.str());
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}
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}
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/**
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* Sets the interval for this timer.
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*
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* @param interval The new interval.
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*/
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void Timer::SetInterval(double interval)
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{
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m_Interval = interval;
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}
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/**
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* Retrieves the interval for this timer.
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*
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* @returns The interval.
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*/
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double Timer::GetInterval(void) const
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{
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return m_Interval;
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}
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/**
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* Registers the timer and starts processing events for it.
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*/
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void Timer::Start(void)
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{
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assert(Application::IsMainThread());
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Stop();
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m_Timers.push_back(GetSelf());
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Reschedule(Utility::GetTime() + m_Interval);
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}
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/**
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* Unregisters the timer and stops processing events for it.
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*/
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void Timer::Stop(void)
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{
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assert(Application::IsMainThread());
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m_Timers.remove_if(WeakPtrEqual<Timer>(this));
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}
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/**
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* Reschedules this timer.
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*
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* @param next The time when this timer should be called again.
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*/
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void Timer::Reschedule(double next)
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{
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m_Next = next;
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}
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