PpDevNodeLockTree

char __fastcall PpDevNodeLockTree(int a1){
  _ETHREAD *CurrentThread; 
  char v2; 
  int v3; 
  int v4; 
  int v5; 
  ULONG IsResourceAcquiredSharedLite; 
  ULONG i; 
  CurrentThread = (_ETHREAD *)KeGetCurrentThread();
  v2 = 1;
  --*((_WORD *)CurrentThread + 242);
  if( !a1 )
    goto LABEL_15;
  v3 = a1 - 1;
  if( !v3 )
  {
    ExAcquireResourceExclusiveLite(&PiEngineLock, 1u);
    goto LABEL_15;
  }
  v4 = v3 - 1;
  if( !v4 )
  {
    if( !ExAcquireResourceExclusiveLite(&PiEngineLock, 0) )
    {
      v2 = 0;
      KeLeaveCriticalRegion();
      return v2;
    }
LABEL_15:
    ExAcquireResourceSharedLite(&IopDeviceTreeLock, 1);
    return v2;
  }
  v5 = v4 - 1;
  if( v5 )
  {
    if( v5 == 1 )
    {
      IsResourceAcquiredSharedLite = ExIsResourceAcquiredSharedLite(&IopDeviceTreeLock);
      for( i = IsResourceAcquiredSharedLite; i; --i )
        ExReleaseResourceLite(&IopDeviceTreeLock);
      for( ; IsResourceAcquiredSharedLite; --IsResourceAcquiredSharedLite )
        ExAcquireResourceExclusiveLite(&IopDeviceTreeLock, 1u);
    }
  }
  else
  {
    ExAcquireResourceExclusiveLite(&PiEngineLock, 1u);
    ExAcquireResourceExclusiveLite(&IopDeviceTreeLock, 1u);
  }
  return v2;
}

Referenced by: