RtlGetInterruptTimePrecise

NTSTATUS __stdcall RtlGetInterruptTimePrecise(INT64 *CurrentQpc){
  unsigned __int64 TimeUpdateLock; 
  unsigned __int64 BaselineInterruptTimeQpc; 
  unsigned int LowPart; 
  LARGE_INTEGER PerformanceCounter; 
  __int64 v6; 
  while( 1 )
  {
    TimeUpdateLock = KUSER_SHARED_DATA.TimeUpdateLock;
    if( (KUSER_SHARED_DATA.TimeUpdateLock & 1) == 0 )
    {
      BaselineInterruptTimeQpc = KUSER_SHARED_DATA.BaselineInterruptTimeQpc;
      LowPart = KUSER_SHARED_DATA.InterruptTime.LowPart;
      PerformanceCounter = KeQueryPerformanceCounter(0i64);
      if( KUSER_SHARED_DATA.TimeUpdateLock == TimeUpdateLock )
        break;
    }
    _mm_pause();
  }
  *CurrentQpc = PerformanceCounter.QuadPart;
  if( PerformanceCounter.QuadPart <= BaselineInterruptTimeQpc )
    return LowPart;
  v6 = PerformanceCounter.QuadPart - BaselineInterruptTimeQpc - 1;
  if( KUSER_SHARED_DATA.QpcInterruptTimeIncrementShift )
    v6 <<= KUSER_SHARED_DATA.QpcInterruptTimeIncrementShift;
  return(((unsigned __int64)v6 * (unsigned __int128)KUSER_SHARED_DATA.QpcInterruptTimeIncrement) >> 64) + LowPart;
}

Referenced by: