ExIsResourceAcquiredSharedLite

NTSTATUS __fastcall ExIsResourceAcquiredSharedLite(UINT64 a1, INT64 a2, INT64 a3){
  __int16 v4; 
  NTSTATUS v5; 
  _ETHREAD *CurrentThread; 
  __int64 SpareByte0; 
  unsigned __int8 v9; 
  __int64 v10; 
  unsigned int v11; 
  int v12; 
  bool v13; 
  unsigned int v14; 
  unsigned __int8 CurrentIrql; 
  _KLOCK_QUEUE_HANDLE LockQueue; 

  v4 = *(_WORD *)(a1 + 26);
  if( (v4 & 0x41) == 1 )
    KeBugCheckEx(0x1C6u, (PVOID)0xF, (PVOID)a1, 0i64, 0i64);
  if( (v4 & 1) != 0 )
  {
    CurrentIrql = KeGetCurrentIrql();
    if( CurrentIrql > 2u )
      KeBugCheckEx(0x1C6u, 0i64, (PVOID)CurrentIrql, (PVOID)2, 0i64);
  }
  if( (v4 & 1) == 0 )
  {
    memset(&LockQueue, 0, sizeof(LockQueue));
    if( !*(_DWORD *)(a1 + 64) )
      return 0;
    CurrentThread = (_ETHREAD *)KeGetCurrentThread();
    if( *(_ETHREAD **)(a1 + 48) == CurrentThread )
      return *(_DWORD *)(a1 + 56) >> 3;
    v5 = 0;
    if( (v4 & 0x80u) != 0 )
      return v5;
    SpareByte0 = CurrentThread->Tcb.SchedulerApc.SpareByte0;
    LockQueue.LockQueue.Lock = (unsigned __int64 *volatile)(a1 + 96);
    LockQueue.LockQueue.Next = 0i64;
    v9 = KeGetCurrentIrql();
    __writecr8(2ui64);
    LockQueue.OldIrql = v9;
    KxAcquireQueuedSpinLock(&LockQueue.LockQueue, (UINT64 *)(a1 + 96));
    v10 = *(_QWORD *)(a1 + 16);
    if( v10 )
    {
      v11 = *(_DWORD *)(v10 + 8);
      if( (unsigned int)SpareByte0 < v11 && *(_ETHREAD **)(v10 + 16 * SpareByte0) == CurrentThread )
      {
        v14 = *(_DWORD *)(v10 + 16 * SpareByte0 + 8);
LABEL_19:
        v5 = v14 >> 3;
        goto LABEL_17;
      }
      v12 = 1;
      if( v11 > 1 )
      {
        while( 1 )
        {
          v13 = *(_QWORD *)(v10 + 16) == (_QWORD)CurrentThread;
          v10 += 16i64;
          if( v13 )
            break;
          if( ++v12 >= v11 )
            goto LABEL_17;
        }
        v14 = *(_DWORD *)(v10 + 8);
        goto LABEL_19;
      }
    }
LABEL_17:
    KeReleaseInStackQueuedSpinLockFromDpcLevel(&LockQueue);
    __writecr8(LockQueue.OldIrql);
    return v5;
  }
  return ExpFastResourceLegacyIsAcquiredShared(a1);
}

Referenced by: