RealTimeStopwatch.cc

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#include <sys/time.h>
#include "RealTimeStopwatch.h"

using namespace utl;


RealTimeStopwatch::RealTimeStopwatch(const bool start) :
  fIsStopped(!start),
  fTimeSum(0)
{
  if (start)
    gettimeofday(&fStart, 0);
}


void
RealTimeStopwatch::Reset()
{
  fIsStopped = true;
  fTimeSum = 0;
}


void
RealTimeStopwatch::Start()
{
  if (fIsStopped) {
    gettimeofday(&fStart, 0);
    fIsStopped = false;
  }
}


double
RealTimeStopwatch::Stop()
{
  if (fIsStopped)
    return fTimeSum;
  else {
    struct timeval stop;
    gettimeofday(&stop, 0);
    fIsStopped = true;
    return fTimeSum +=
      (stop.tv_sec - fStart.tv_sec)*second +
      (stop.tv_usec - fStart.tv_usec)*microsecond;
  }
}


double
RealTimeStopwatch::GetTime()
{
  if (fIsStopped)
    return fTimeSum;
  else {
    struct timeval stop;
    gettimeofday(&stop, 0);
    return fTimeSum + (stop.tv_sec - fStart.tv_sec)*second +
                      (stop.tv_usec - fStart.tv_usec)*microsecond;
  }
}


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