Function _cupsGetClock

cups/clock.c:40–114

//

double					// O - Elapsed seconds
_cupsGetClock(void)
{
  double	secs;			// Elapsed seconds
#ifdef _WIN32
  ULONGLONG	curtick;		// Current tick count
#else
#  if defined(CLOCK_MONOTONIC) || defined(CLOCK_MONOTONIC_RAW)
  struct timespec curclock;		// Current clock value
#  endif // CLOCK_MONOTONIC || CLOCK_MONOTONIC_RAW
  struct timeval curtime;		// Current time value
#endif // _WIN32


  _cupsMutexLock(&cups_clock_mutex);

#ifdef _WIN32
  // Get the current tick count in milliseconds...
  curtick = GetTickCount64();

  if (!cups_clock_init)
  {
    // First time through initialize the initial tick count...
    cups_clock_init = 1;
    cups_first_tick = curtick;
  }

  // Convert ticks to seconds...
  if (curtick < cups_first_tick)
    secs = 0.0;
  else
    secs = 0.001 * (curtick - cups_first_tick);

#else
#  if defined(CLOCK_MONOTONIC) || defined(CLOCK_MONOTONIC_RAW)
  // Get the current tick count in milliseconds...
#    ifdef CLOCK_MONOTONIC_RAW
  if (!clock_gettime(CLOCK_MONOTONIC_RAW, &curclock))
#    else
  if (!clock_gettime(CLOCK_MONOTONIC, &curclock))
#    endif // CLOCK_MONOTONIC_RAW
  {
    if (!cups_clock_init)
    {
      // First time through initialize the initial clock value...
      cups_clock_init  = 1;
      cups_first_clock = curclock;
    }

    // Convert clock value to seconds...
    if ((secs = curclock.tv_sec - cups_first_clock.tv_sec + 0.000000001 * (curclock.tv_nsec - cups_first_clock.tv_nsec)) < 0.0)
      secs = 0.0;
  }
  else
#  endif // CLOCK_MONOTONIC || CLOCK_MONOTONIC_RAW
  {
    gettimeofday(&curtime, /*tzp*/NULL);