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/*******************************************************************************
* timer.h
*
* ---------------------------------------------------------------------------
* Persistence of Vision Ray Tracer ('POV-Ray') version 3.7.
* Copyright 1991-2013 Persistence of Vision Raytracer Pty. Ltd.
*
* POV-Ray is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* POV-Ray 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* ---------------------------------------------------------------------------
* POV-Ray is based on the popular DKB raytracer version 2.12.
* DKBTrace was originally written by David K. Buck.
* DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
* ---------------------------------------------------------------------------
* $File: //depot/public/povray/3.x/source/base/timer.h $
* $Revision: #1 $
* $Change: 6069 $
* $DateTime: 2013/11/06 11:59:40 $
* $Author: chrisc $
*******************************************************************************/
#ifndef POVRAY_BASE_TIMER_H
#define POVRAY_BASE_TIMER_H
#include <boost/thread.hpp>
#include "base/configbase.h"
namespace pov_base
{
/**
* Wait for the specified time.
* @param msec Milliseconds to wait.
*/
void Delay(unsigned int msec);
#ifndef POV_TIMER
/// Use default time if no platform specific implementation is provided.
#define POV_TIMER TimerDefault
/**
* Default class for millisecond-precision timers.
*/
class TimerDefault
{
public:
/**
* Create a new timer and start it.
* @param tctime CPU time shall only be that consumed
* by the current thread (if supported).
*/
TimerDefault(bool tctime = false);
/**
* Destructor.
*/
~TimerDefault();
/**
* Determine elapsed real time since creation or last reset.
* @return Elapsed real time in milliseconds.
*/
POV_LONG ElapsedRealTime() const;
/**
* Determine elapsed CPU time since creation or last reset.
* If not supported, return elapsed real time instead!
* @return Elapsed CPU time in milliseconds.
*/
POV_LONG ElapsedCPUTime() const;
/**
* Reset the timer.
*/
void Reset();
/**
* Determine if CPU time is supported for the current settings.
* in particular this has to return false if keeping the CPU time
* for the current thread is not supported but was requsted!
* @return True if the CPU time is validfor the current
* requested settings, false otherwise.
*/
bool HasValidCPUTime() const;
private:
/// thread CPU time flag
bool threadCPUTimeOnly;
/// real time at last reset
boost::xtime realTimeStart;
/// CPU time at last reset
boost::xtime cpuTimeStart;
};
#endif
}
#ifdef USE_SYSPROTO
#include "syspovprotobase.h"
#endif
namespace pov_base
{
/// Millisecond-precision timer
typedef POV_TIMER Timer;
}
#endif // POVRAY_BASE_TIMER_H
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