KiDeferGroupSchedulingPreemption

VOID __fastcall KiDeferGroupSchedulingPreemption(_ETHREAD *CurrentThread, _KPRCB *CurrentPrcb){
  int v4; 
  _ETHREAD *NextThread; 
  _KPRCB *v6; 
  _KSCB *SchedulingGroup; 
  UINT8 IsThreadRankNonZero; 
  char Priority; 
  int v10; 
  INT64 v11; 
  UINT8 ShareRankNonZero; 
  UINT64 SpinCount; 

  if( CurrentThread->Tcb.SchedulingGroup && KiShouldPreemptionBeDeferred(&CurrentThread->Tcb) )
  {
    v4 = 0;
    LODWORD(SpinCount) = 0;
    ShareRankNonZero = 0;
    while( _interlockedbittestandset64((volatile signed __int32 *)&CurrentPrcb->PrcbLock, 0i64) )
    {
      do
        KeYieldProcessorEx(&SpinCount);
      while( CurrentPrcb->PrcbLock );
    }
    NextThread = CurrentPrcb->NextThread;
    if( CurrentThread->Tcb.SchedulingGroup
      && NextThread != CurrentPrcb->IdleThread
      && (unsigned int)KiPrcbInGroupAffinity(CurrentPrcb, &CurrentThread->Tcb.Affinity)
      && ((SchedulingGroup = (_KSCB *)NextThread->Tcb.SchedulingGroup) != 0i64
       && (SchedulingGroup = (_KSCB *)((char *)SchedulingGroup + CurrentPrcb->ScbOffset)) != 0i64
       && (KiGetThreadEffectiveRankNonZero(NextThread, SchedulingGroup, v6, 1u, &ShareRankNonZero), (v4 = v10) != 0)
       || NextThread->Tcb.Priority <= CurrentThread->Tcb.Priority) )
    {
      CurrentPrcb->NextThread = 0i64;
      if( (CurrentThread->Tcb.gap0[2] & 4) == 0
        || (IsThreadRankNonZero = KiIsThreadRankNonZero(&CurrentThread->Tcb, CurrentPrcb, v6),
            Priority = 1,
            !IsThreadRankNonZero) )
      {
        Priority = CurrentThread->Tcb.Priority;
      }
      *CurrentPrcb->PriorityState = Priority;
      if( CurrentPrcb->SchedulerAssist )
      {
        v11 = (unsigned int)KiVpThreadSystemWorkPriority;
        if( CurrentThread != CurrentPrcb->IdleThread )
          v11 = (unsigned int)Priority;
        KiSetSchedulerAssistPriority((INT32 *)CurrentPrcb->SchedulerAssist, v11, 0);
      }
      NextThread->Tcb.WaitBlockFill6[68] = 1;
      if( v4 )
        KiAddThreadToScbQueue(CurrentPrcb, SchedulingGroup, &NextThread->Tcb, 1ui64);
      else
        KiAddThreadToPrcbQueue(
          CurrentPrcb,
          &NextThread->Tcb,
          (unsigned int)NextThread->Tcb.Priority,
          1ui64,
          ShareRankNonZero);
      _InterlockedAnd64((volatile signed __int64 *)&CurrentPrcb->PrcbLock, 0i64);
      KiInsertDeferredPreemptionApc(CurrentPrcb, &CurrentThread->Tcb, 0);
    }
    else
    {
      _InterlockedAnd64((volatile signed __int64 *)&CurrentPrcb->PrcbLock, 0i64);
    }
  }
}

Referenced by: