Logo Search packages:      
Sourcecode: poco version File versions  Download package

Timer.cpp

//
// Timer.cpp
//
// $Id: //poco/1.2/Foundation/src/Timer.cpp#1 $
//
// Library: Foundation
// Package: Threading
// Module:  Timer
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/Timer.h"
#include "Poco/ThreadPool.h"
#include "Poco/Exception.h"
#include "Poco/ErrorHandler.h"


namespace Poco {


Timer::Timer(long startInterval, long periodicInterval): 
      _startInterval(startInterval), 
      _periodicInterval(periodicInterval),
      _pCallback(0)
{
      poco_assert (startInterval >= 0 && periodicInterval >= 0);
}


00055 Timer::~Timer()
{
      stop();
}


00061 void Timer::start(const AbstractTimerCallback& method)
{
      start(method, ThreadPool::defaultPool());
}


00067 void Timer::start(const AbstractTimerCallback& method, ThreadPool& threadPool)
{
      poco_assert (!_pCallback);

      FastMutex::ScopedLock lock(_mutex); 
      _pCallback = method.clone();
      _wakeUp.reset();
      threadPool.start(*this);
}


00078 void Timer::stop()
{
      FastMutex::ScopedLock lock(_mutex);
      if (_pCallback)
      {
            _periodicInterval = 0;
            _mutex.unlock();
            _wakeUp.set();
            _done.wait(); // warning: deadlock if called from timer callback
            _mutex.lock();
            delete _pCallback;
            _pCallback = 0;
      }
}


00094 void Timer::restart()
{
      FastMutex::ScopedLock lock(_mutex);
      if (_pCallback)
      {
            _wakeUp.set();
      }
}


00104 void Timer::restart(long milliseconds)
{
      poco_assert (milliseconds >= 0);
      FastMutex::ScopedLock lock(_mutex);
      if (_pCallback)
      {
            _periodicInterval = milliseconds;
            _wakeUp.set();
      }
}


00116 long Timer::getStartInterval() const
{
      FastMutex::ScopedLock lock(_mutex);
      return _startInterval;
}


00123 void Timer::setStartInterval(long milliseconds)
{
      poco_assert (milliseconds >= 0);
      FastMutex::ScopedLock lock(_mutex);
      _startInterval = milliseconds;
}


00131 long Timer::getPeriodicInterval() const
{
      FastMutex::ScopedLock lock(_mutex);
      return _periodicInterval;
}


00138 void Timer::setPeriodicInterval(long milliseconds)
{
      poco_assert (milliseconds >= 0);
      FastMutex::ScopedLock lock(_mutex);
      _periodicInterval = milliseconds;
}


00146 void Timer::run()
{
      long interval;
      {
            FastMutex::ScopedLock lock(_mutex);
            interval = _startInterval;
      }
      do
      {
            if (_wakeUp.tryWait(interval))
            {
                  FastMutex::ScopedLock lock(_mutex);
                  interval = _periodicInterval;
            }
            else
            {
                  try
                  {
                        _pCallback->invoke(*this);
                  }
                  catch (Exception& exc)
                  {
                        ErrorHandler::handle(exc);
                  }
                  catch (std::exception& exc)
                  {
                        ErrorHandler::handle(exc);
                  }
                  catch (...)
                  {
                        ErrorHandler::handle();
                  }
                  {
                        FastMutex::ScopedLock lock(_mutex);
                        interval = _periodicInterval;
                  }
            }
      }
      while (interval > 0);
      _done.set();
}


AbstractTimerCallback::AbstractTimerCallback()
{
}


AbstractTimerCallback::AbstractTimerCallback(const AbstractTimerCallback& callback)
{
}


AbstractTimerCallback::~AbstractTimerCallback()
{
}


AbstractTimerCallback& AbstractTimerCallback::operator = (const AbstractTimerCallback& callback)
{
      return *this;
}


} // namespace Poco

Generated by  Doxygen 1.6.0   Back to index