IoCancelIrp

VOID __stdcall IoCancelIrp(KDPC *Dpc, PVOID DeferredContext, PVOID SystemArgument1, PVOID SystemArgument2){
  KIRQL v5; 
  __int64(__fastcall *v6)(__int64, __int64); 
  KIRQL v7; 
  bool v8; 
  if( ViVerifierEnabled
    && ((VfRuleClasses & 0xFFAFFFFF) != 0
     || (VfRuleClasses & 0x200000000i64) != 0
     || (VfRuleClasses & 0x400000000i64) != 0) )
  {
    IovCancelIrp((_IRP *)Dpc);
  }
  v5 = KeAcquireQueuedSpinLock(7ui64);
  *((_BYTE *)&Dpc[1].0 + 4) = 1;
  v6 = (__int64(__fastcall *)(__int64, __int64))_InterlockedExchange64(
                                                   (volatile __int64 *)&Dpc[1].SystemArgument1,
                                                   0i64);
  v7 = v5;
  if( v6 )
  {
    if( SHIBYTE(Dpc[1].Number) > (char)(LOBYTE(Dpc[1].Number) + 1) )
      KeBugCheckEx(0x48u, (ULONG_PTR)Dpc, (ULONG_PTR)v6, 0i64, 0i64);
    v8 = ViVerifierEnabled == 0;
    *((_BYTE *)&Dpc[1].0 + 5) = v5;
    if( !v8
      && ((VfRuleClasses & 0xFFAFFFFF) != 0
       || (VfRuleClasses & 0x200000000i64) != 0
       || (VfRuleClasses & 0x400000000i64) != 0) )
    {
      IovpCancelRoutine(*((_QWORD *)Dpc[2].DpcData + 5), (__int64)Dpc, v6);
    }
    else
    {
      v6(*((_QWORD *)Dpc[2].DpcData + 5), (__int64)Dpc);
    }
    if( KeGetCurrentIrql() == 2 && v7 != 2 )
      KeBugCheckEx(0x11Bu, (ULONG_PTR)Dpc, (ULONG_PTR)v6, 0i64, 0i64);
  }
  else
  {
    KeReleaseQueuedSpinLock(7ui64, v5);
  }
}

Referenced by: