FsRtlFastUnlockSingleShared

VOID __fastcall FsRtlFastUnlockSingleShared(
        _LOCK_INFO *LockInfo,
        _FILE_OBJECT *FileObject,
        _LARGE_INTEGER *FileOffset,
        _LARGE_INTEGER *Length,
        _EPROCESS *ProcessId,
        UINT64 Key,
        VOID *Context,
        UINT8 IgnoreUnlockRoutine,
        UINT8 CheckForWaiters){
  unsigned __int64 QuadPart; 
  UINT64 *v10; 
  unsigned __int8 v13; 
  _RTL_SPLAY_LINKS *v14; 
  unsigned __int64 v15; 
  _RTL_SPLAY_LINKS *FirstOverlappingSharedNode; 
  _RTL_SPLAY_LINKS *v17; 
  _RTL_SPLAY_LINKS *v18; 
  _RTL_SPLAY_LINKS *v19; 
  _RTL_SPLAY_LINKS *Parent; 
  _RTL_SPLAY_LINKS *v21; 
  bool v22; 
  _RTL_SPLAY_LINKS *v23; 
  _LARGE_INTEGER StartingByte; 
  _RTL_SPLAY_LINKS *v25; 
  _FILE_OBJECT *v26; 
  _LARGE_INTEGER EndingByte; 
  _LARGE_INTEGER *v28; 

  v28 = Length;
  v26 = FileObject;
  QuadPart = FileOffset->QuadPart;
  v10 = (UINT64 *)(LockInfo + 6);
  StartingByte = *FileOffset;
  v13 = KeAcquireSpinLockRaiseToDpc((UINT64 *)LockInfo + 3);
  v14 = (_RTL_SPLAY_LINKS *)v10[1];
  v15 = v13;
  if( !v14 )
    goto LABEL_26;
  EndingByte.QuadPart = Length->QuadPart + QuadPart - 1;
  FirstOverlappingSharedNode = FsRtlFindFirstOverlappingSharedNode(v14, &StartingByte, &EndingByte, 0i64, 0i64);
  v17 = FirstOverlappingSharedNode;
  if( !FirstOverlappingSharedNode )
    goto LABEL_26;
  v18 = FirstOverlappingSharedNode - 1;
  v19 = 0i64;
  Parent = v18->Parent;
  v21 = v18;
  v25 = 0i64;
  if( !Parent )
    goto LABEL_26;
  while( 1 )
  {
    if( (_FILE_OBJECT *)Parent[1].LeftChild == v26
      && (_EPROCESS *)Parent[1].RightChild == ProcessId
      && HIDWORD(Parent[1].Parent) == (_DWORD)Key )
    {
      v22 = Parent->LeftChild <= (_RTL_SPLAY_LINKS *)QuadPart;
      if( Parent->LeftChild != (_RTL_SPLAY_LINKS *)QuadPart )
        goto LABEL_28;
      if( Parent->RightChild == (_RTL_SPLAY_LINKS *)v28->QuadPart )
        break;
    }
    v22 = Parent->LeftChild <= (_RTL_SPLAY_LINKS *)QuadPart;
LABEL_28:
    if( v22 )
    {
      v23 = Parent[2].Parent;
      v21 = Parent;
      Parent = Parent->Parent;
      if( v19 < v23 )
        v19 = v23;
      v25 = v19;
      if( Parent )
        continue;
    }
    goto LABEL_26;
  }
  if( v26->LastLock == &Parent->LeftChild )
    v26->LastLock = 0i64;
  if( v21->Parent == v18[2].Parent )
    v18[2].Parent = v21;
  v21->Parent = Parent->Parent;
  if( v21 == v18 )
  {
    if( !v18->Parent )
    {
      v10[1] = (UINT64)RtlDelete(v17);
      ExFreeToNPagedLookasideList((_NPAGED_LOOKASIDE_LIST *)((char *)&WheapErrorSourceTable + 2472), v18);
      v18 = 0i64;
    }
    if( *(_RTL_SPLAY_LINKS **)LockInfo == Parent->LeftChild )
      FsRtlPrivateResetLowestLockOffset(LockInfo);
  }
  if( v18 )
    FsRtlSplitLocks((__int64)v18, v21, (unsigned __int64 *)&Parent[2], &v25);
  if( !IgnoreUnlockRoutine && *((_QWORD *)LockInfo + 2) )
  {
    KxReleaseSpinLock(v10);
    __writecr8(v15);
    (*((void(__fastcall **)(VOID *, _RTL_SPLAY_LINKS **))LockInfo + 2))(Context, &Parent->LeftChild);
    LOBYTE(v15) = KeAcquireSpinLockRaiseToDpc(v10);
  }
  ExFreeToNPagedLookasideList((_NPAGED_LOOKASIDE_LIST *)((char *)&WheapErrorSourceTable + 2600), Parent);
  if( CheckForWaiters && v10[3] )
    FsRtlPrivateCheckWaitingLocks(LockInfo, (_LOCK_QUEUE *)v10, v15);
LABEL_26:
  KxReleaseSpinLock(v10);
  __writecr8((unsigned __int8)v15);
}

Referenced by: