ExAcquireRundownProtection

BOOL __stdcall ExAcquireRundownProtection(PEX_RUNDOWN_REF RunRef){
  signed __int64 v1; 
  signed __int64 v2; 
  _m_prefetchw(RunRef);
  v2 = RunRef->Count & 0xFFFFFFFFFFFFFFFEui64;
  v1 = _InterlockedCompareExchange64((volatile signed __int64 *)RunRef, v2 + 2, v2);
  if( v2 == v1 )
    LOBYTE(v1) = 1;
  else
    LOBYTE(v1) = ExfAcquireRundownProtection(RunRef);
  return v1;
}

Referenced by: