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Copy pathTimer.cpp
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340 lines (270 loc) · 5.78 KB
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//
// Timer.cpp
//
// $Id: //poco/1.4/Util/src/Timer.cpp#2 $
//
// Library: Util
// Package: Timer
// Module: Timer
//
// Copyright (c) 2009, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Util/Timer.h"
#include "Poco/Notification.h"
#include "Poco/ErrorHandler.h"
#include "Poco/Event.h"
using Poco::ErrorHandler;
namespace Poco {
namespace Util {
class TimerNotification: public Poco::Notification
{
public:
TimerNotification(Poco::TimedNotificationQueue& queue):
_queue(queue)
{
}
~TimerNotification()
{
}
virtual bool execute() = 0;
Poco::TimedNotificationQueue& queue()
{
return _queue;
}
private:
Poco::TimedNotificationQueue& _queue;
};
class StopNotification: public TimerNotification
{
public:
StopNotification(Poco::TimedNotificationQueue& queue):
TimerNotification(queue)
{
}
~StopNotification()
{
}
bool execute()
{
queue().clear();
return false;
}
};
class CancelNotification: public TimerNotification
{
public:
CancelNotification(Poco::TimedNotificationQueue& queue):
TimerNotification(queue)
{
}
~CancelNotification()
{
}
bool execute()
{
queue().clear();
_finished.set();
return true;
}
void wait()
{
_finished.wait();
}
private:
Poco::Event _finished;
};
class TaskNotification: public TimerNotification
{
public:
TaskNotification(Poco::TimedNotificationQueue& queue, TimerTask::Ptr pTask):
TimerNotification(queue),
_pTask(pTask)
{
}
~TaskNotification()
{
}
TimerTask::Ptr task()
{
return _pTask;
}
bool execute()
{
if (!_pTask->isCancelled())
{
try
{
_pTask->_lastExecution.update();
_pTask->run();
}
catch (Exception& exc)
{
ErrorHandler::handle(exc);
}
catch (std::exception& exc)
{
ErrorHandler::handle(exc);
}
catch (...)
{
ErrorHandler::handle();
}
}
return true;
}
private:
TimerTask::Ptr _pTask;
};
class PeriodicTaskNotification: public TaskNotification
{
public:
PeriodicTaskNotification(Poco::TimedNotificationQueue& queue, TimerTask::Ptr pTask, long interval):
TaskNotification(queue, pTask),
_interval(interval)
{
}
~PeriodicTaskNotification()
{
}
bool execute()
{
TaskNotification::execute();
if (!task()->isCancelled())
{
Poco::Clock now;
Poco::Clock nextExecution;
nextExecution += static_cast<Poco::Clock::ClockDiff>(_interval)*1000;
if (nextExecution < now) nextExecution = now;
queue().enqueueNotification(this, nextExecution);
duplicate();
}
return true;
}
private:
long _interval;
};
class FixedRateTaskNotification: public TaskNotification
{
public:
FixedRateTaskNotification(Poco::TimedNotificationQueue& queue, TimerTask::Ptr pTask, long interval, Poco::Clock clock):
TaskNotification(queue, pTask),
_interval(interval),
_nextExecution(clock)
{
}
~FixedRateTaskNotification()
{
}
bool execute()
{
TaskNotification::execute();
if (!task()->isCancelled())
{
Poco::Clock now;
_nextExecution += static_cast<Poco::Clock::ClockDiff>(_interval)*1000;
if (_nextExecution < now) _nextExecution = now;
queue().enqueueNotification(this, _nextExecution);
duplicate();
}
return true;
}
private:
long _interval;
Poco::Clock _nextExecution;
};
Timer::Timer()
{
_thread.start(*this);
}
Timer::Timer(Poco::Thread::Priority priority)
{
_thread.setPriority(priority);
_thread.start(*this);
}
Timer::~Timer()
{
try
{
_queue.enqueueNotification(new StopNotification(_queue), Poco::Clock(0));
_thread.join();
}
catch (...)
{
poco_unexpected();
}
}
void Timer::cancel(bool wait)
{
Poco::AutoPtr<CancelNotification> pNf = new CancelNotification(_queue);
_queue.enqueueNotification(pNf, Poco::Clock(0));
if (wait)
{
pNf->wait();
}
}
void Timer::schedule(TimerTask::Ptr pTask, Poco::Timestamp time)
{
validateTask(pTask);
_queue.enqueueNotification(new TaskNotification(_queue, pTask), time);
}
void Timer::schedule(TimerTask::Ptr pTask, Poco::Clock clock)
{
validateTask(pTask);
_queue.enqueueNotification(new TaskNotification(_queue, pTask), clock);
}
void Timer::schedule(TimerTask::Ptr pTask, long delay, long interval)
{
Poco::Clock clock;
clock += static_cast<Poco::Clock::ClockDiff>(delay)*1000;
schedule(pTask, clock, interval);
}
void Timer::schedule(TimerTask::Ptr pTask, Poco::Timestamp time, long interval)
{
validateTask(pTask);
_queue.enqueueNotification(new PeriodicTaskNotification(_queue, pTask, interval), time);
}
void Timer::schedule(TimerTask::Ptr pTask, Poco::Clock clock, long interval)
{
validateTask(pTask);
_queue.enqueueNotification(new PeriodicTaskNotification(_queue, pTask, interval), clock);
}
void Timer::scheduleAtFixedRate(TimerTask::Ptr pTask, long delay, long interval)
{
Poco::Clock clock;
clock += static_cast<Poco::Clock::ClockDiff>(delay)*1000;
scheduleAtFixedRate(pTask, clock, interval);
}
void Timer::scheduleAtFixedRate(TimerTask::Ptr pTask, Poco::Timestamp time, long interval)
{
validateTask(pTask);
Poco::Timestamp tsNow;
Poco::Clock clock;
Poco::Timestamp::TimeDiff diff = time - tsNow;
clock += diff;
_queue.enqueueNotification(new FixedRateTaskNotification(_queue, pTask, interval, clock), clock);
}
void Timer::scheduleAtFixedRate(TimerTask::Ptr pTask, Poco::Clock clock, long interval)
{
validateTask(pTask);
_queue.enqueueNotification(new FixedRateTaskNotification(_queue, pTask, interval, clock), clock);
}
void Timer::run()
{
bool cont = true;
while (cont)
{
Poco::AutoPtr<TimerNotification> pNf = static_cast<TimerNotification*>(_queue.waitDequeueNotification());
cont = pNf->execute();
}
}
void Timer::validateTask(const TimerTask::Ptr& pTask)
{
if (pTask->isCancelled())
{
throw Poco::IllegalStateException("A cancelled task must not be rescheduled");
}
}
} } // namespace Poco::Util