KeSetTimer2

NTSTATUS __fastcall KeSetTimer2(INT64 a1, INT64 a2, INT64 a3, INT64 a4){
  INT64 v5; 
  INT64 v6; 
  char v8; 
  char v9; 
  unsigned __int64 v10; 
  UINT64 v11; 
  __int64 v12; 
  __int64 v13; 
  unsigned __int8 v14; 
  int v15; 
  char v16; 
  bool v17; 
  char v18; 
  signed __int32 v19; 
  signed __int32 v20; 
  CHAR v21; 
  INT64 v22; 
  INT64 v24; 
  INT64 v25; 
  char v26; 
  INT64 v27; 
  signed __int32 v28; 
  UINT8 WasLate; 
  __int64 CurrentIrql; 
  INT64 CurrentQpc; 

  CurrentQpc = 0i64;
  v5 = a3;
  v6 = a2;
  if( a3 && a3 < (unsigned int)KeMinimumIncrement )
    v5 = (unsigned int)KeMinimumIncrement;
  v8 = *(_BYTE *)(a1 + 129);
  CurrentIrql = KeGetCurrentIrql();
  __writecr8(2ui64);
  v9 = 0;
  if( a2 > 0 )
  {
    v9 = 1;
    if( (v8 & 4) != 0 )
    {
      LODWORD(v27) = RtlGetSystemTimePrecise();
      v24 = v27;
    }
    else
    {
      v24 = *(_QWORD *)&KUSER_SHARED_DATA.SystemTime.LowPart;
    }
    v25 = 0i64;
    if( v6 > v24 )
      v25 = v24 - v6;
    v6 = v25;
  }
  if( (v8 & 4) != 0 )
    LODWORD(v10) = RtlGetInterruptTimePrecise(&CurrentQpc);
  else
    v10 = *(_QWORD *)&KUSER_SHARED_DATA.InterruptTime.LowPart;
  v11 = v10 - v6;
  if( v10 - v6 < v10 || v11 == -1i64 )
    v11 = -2i64;
  v12 = v11;
  if( a4 && *(_BYTE *)(a1 + 130) != 21 )
  {
    v13 = *(_QWORD *)(a4 + 8);
    if( v13 == -1 )
    {
      v12 = -1i64;
    }
    else
    {
      v12 = v13 + v11;
      if( v13 + v11 < v11 || v12 == -1 )
        v12 = -2i64;
    }
  }
  v14 = 0;
  WasLate = 0;
  v15 = 1;
  if( !KiAcquireTimer2LockUnlessDisabled((_KTIMER2 *)a1) )
  {
    if( KiAcquireTimer2CollectionLockIfInserted((_KTIMER2 *)a1) )
    {
      KiRemoveTimer2((_KTIMER2 *)a1);
      KxReleaseSpinLock(&KiTimer2CollectionLock);
      v14 = 1;
    }
    else
    {
      v16 = *(_BYTE *)(a1 + 1);
      if( (v16 & 0xF) != 0 )
      {
        v15 = 8;
        if( (v16 & 4) == 0 )
          v14 = 1;
      }
    }
    v17 = (KiVelocityFlags & 0x2000) == 0;
    *(_QWORD *)(a1 + 72) = v11;
    *(_QWORD *)(a1 + 80) = v12;
    v18 = *(_BYTE *)(a1 + 129);
    *(_DWORD *)(a1 + 4) = 0;
    *(_QWORD *)(a1 + 88) = v5;
    *(_BYTE *)(a1 + 128) = v9;
    if( v17 )
    {
      if( (v18 & 0x10) == 0 )
      {
LABEL_43:
        *(_BYTE *)(a1 + 129) = v18 | 0x10;
        KiUpdateTimer2Collections((_BYTE *)a1);
      }
    }
    else if( (v18 & 0xE) == 0 )
    {
      if( !PsTimerResolutionActive((INT64)KeGetCurrentThread()->ApcState.Process) )
      {
        if( v26 )
        {
          *(_BYTE *)(a1 + 129) = v18 & 0xEF;
          KiUpdateTimer2Collections((_BYTE *)a1);
        }
        goto LABEL_17;
      }
      if( !v26 )
        goto LABEL_43;
    }
LABEL_17:
    if( v15 == 1 )
    {
      KxAcquireSpinLock(&KiTimer2CollectionLock);
      KiInsertTimer2WithCollectionLockHeld((_KTIMER2 *)a1, 1u, &WasLate);
    }
    v19 = *(_DWORD *)a1;
    v20 = _InterlockedCompareExchange(
            (volatile signed __int32 *)a1,
            (v15 << 8) | *(_DWORD *)a1 & 0xFFFFF07F,
            *(_DWORD *)a1);
    if( v19 != v20 )
    {
      do
      {
        v28 = v20;
        v20 = _InterlockedCompareExchange((volatile signed __int32 *)a1, (v15 << 8) | v20 & 0xFFFFF07F, v20);
      }
      while( v28 != v20 );
    }
    if( v15 == 1 )
      KxReleaseSpinLock(&KiTimer2CollectionLock);
    if( !KeIsForceIdleEngaged() )
    {
      if( WasLate )
      {
        KiRequestTimer2Expiration(v22, v21);
      }
      else if( (v8 & 4) != 0 && KiShouldActivateHRTimerClock(*(UINT64 *)&KUSER_SHARED_DATA.InterruptTime.LowPart, v11) )
      {
        KiSendClockInterruptToClockOwner();
      }
    }
  }
  __writecr8((unsigned __int8)CurrentIrql);
  return v14;
}

Referenced by: