lgrClock.h

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/******************************************************************************
** Copyright (c) 1992-2010 VT MAK
** All rights reserved.
******************************************************************************/


#ifndef lgrClock_H_
#define lgrClock_H_

#include "lgrCore.h"
#include "absoluteTime.h"

#include <vlutil/vlTime.h>

namespace MAKLogger
{

   class DT_DLL_LGRCORE DtTimeProvider
   {
   public:
      DtTimeProvider();

      virtual ~DtTimeProvider();

      virtual void tick() = 0;

      virtual double advancedTime() const = 0;

      virtual double elapsedTime() const = 0;

      virtual double timeOffset() const = 0;
   };

   class DT_DLL_LGRCORE DtWallClockTimeProvider : public DtTimeProvider
   {
   public:
      DtWallClockTimeProvider();

      virtual ~DtWallClockTimeProvider();

      virtual void tick();

      virtual double advancedTime() const;

      virtual double elapsedTime() const;

      virtual double timeOffset() const;

   protected:
      DtClock myClock;
      double myTimeAdvance;
      double myLastAbsTime;
   };

   class DT_DLL_LGRCORE DtLgrClock
   {
   public:
      DtLgrClock(const DtTimeProvider* timeProvider);
      virtual ~DtLgrClock();

      virtual void tick();

      DtAbsoluteTime currentTime() const;

      void setCurrentTime(const DtAbsoluteTime& newTime);

      virtual DtAbsoluteTime pendingTime() const;

      DtRelativeTime lastTimeStep() const;

      virtual void stop();

      virtual void pause();

      virtual void   setTimeScale(double scaleValue);

      virtual double timeScale() const;

      virtual void setTimeProvider(const DtTimeProvider* timeProvider);

      virtual const DtTimeProvider* timeProvider() const;

   protected:

      const DtTimeProvider* myTimeProvider;

      DtAbsoluteTime myLastTime;
      DtAbsoluteTime myCurrentTime;
      DtRelativeTime myLastTimeStep;

      double         myTimeScale;
   };

}

#endif