ExAcquireSpinLockExclusiveAtDpcLevel

VOID __stdcall ExAcquireSpinLockExclusiveAtDpcLevel(INT64 *SpinLock){
  UINT64 v1; 
  UINT64 *v2; 
  signed __int32 v4; 
  bool v5; 
  signed __int32 v6; 
  UINT64 SpinCount; 
  LODWORD(SpinCount) = 0;
  if( _interlockedbittestandset((volatile signed __int32 *)SpinLock, 0x1Fu) )
  {
    LOBYTE(v1) = -1;
    LODWORD(SpinCount) = ExpWaitForSpinLockExclusiveAndAcquire((RTL_BITMAP *)SpinLock, v1, v2);
  }
  v4 = *(_DWORD *)SpinLock;
  while( (v4 & 0xBFFFFFFF) != 0x80000000 )
  {
    if( (v4 & 0x40000000) == 0 )
    {
      v6 = _InterlockedCompareExchange((volatile signed __int32 *)SpinLock, v4 | 0x40000000, v4);
      v5 = v4 == v6;
      v4 = v6;
      if( !v5 )
        continue;
    }
    KeYieldProcessorEx(&SpinCount);
    v4 = *(_DWORD *)SpinLock;
  }
}

Referenced by: