public override long GetKernelTicks()
{
bool en = Processor.DisableInterrupts();
this.AcquireLock();
try {
if (this.hpetClock == null) {
return (long) pmClock.GetKernelTicks();
}
else {
return (long) hpetClock.GetKernelTicks();
}
}
finally {
this.ReleaseLock();
Processor.RestoreInterrupts(en);
}
}
private long InternalGetKernelTicks()
{
if (!tscSnapshotValid)
{
if (hpetClock == null)
{
ticksSnapshot = (long)pmClock.GetKernelTicks();
}
else
{
ticksSnapshot = (long)hpetClock.GetKernelTicks();
}
tscSnapshot = Processor.CycleCount;
tscSnapshotValid = true;
return(ticksSnapshot);
}
else
{
long tscDelta = (long)(Processor.CycleCount - tscSnapshot);
long tickDelta = (tscDelta * tickScale) >> tickRoll;
return(ticksSnapshot + tickDelta);
}
}