SbElapsedTime.h

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/*=======================================================================
** Author      : VSG (MMM YYYY)
**=======================================================================*/
// SbElapsedTime.h
 
#ifndef _SB_ELAPSED_TIME_H_
#define _SB_ELAPSED_TIME_H_
 
#include <Inventor/SbBase.h>
#include <Inventor/SbTime.h>
#include <Inventor/STL/iostream>
 
class  SbElapsedTime {
 
 public:
  SbElapsedTime();
 
  void reset();
 
  double getElapsed() const;
 
  SbTime getElapsedTime() const;
 
 private:
 
  static uint64_t getTimeStamp();
 
   friend std::ostream& operator << (std::ostream& os, const SbElapsedTime& t);
 
 private:
  static SbBool hasHiResTimer();
 
  // Does this system have a hi-res timer?
  static SbBool haveHiRes;
 
  // Set by constructor and reset method
  SbTime m_startTime;
 
#ifdef _WIN32
  // Frequency of high performance counter
  static double m_frequency;
 
  // Set by constructor and reset method
  LARGE_INTEGER m_startCount;
#endif
};
 
#endif //_SB_ELAPSED_TIME_H_