MiSetPfnTbFlushStamp.c

int64_t MiSetPfnTbFlushStamp(_MMPFN *pfn, char flushStamp, BOOL pfnLocked)
{
  if(pfnLocked)
    pfn->u2.TbFlushStamp = flushStamp;
  else // CAS loop
    while(true) {
      auto old = pfn->u2;
      auto new = old;
      new.TbFlushStamp = flushStamp;
      if(_InterlockedCompareExchange(&pfn->u2.Lock, new.EntireField, old.EntireField) == old.EntireField)
        break;
    }
}