VOID FASTCALL KeUpdateSystemTime	(	IN PKTRAP_FRAME	TrapFrame,
		IN ULONG	Increment,
		IN KIRQL	Irql
	)

Definition at line 64 of file time.c.

Referenced by HalpClockInterrupt(), HalpClockInterruptHandler(), and KiInterruptDispatch3().

{
    PKPRCB Prcb = KeGetCurrentPrcb();
    ULARGE_INTEGER CurrentTime, InterruptTime;
    LONG OldTickOffset;

    /* Check if this tick is being skipped */
    if (Prcb->SkipTick)
    {
        /* Handle it next time */
        Prcb->SkipTick = FALSE;

        /* Increase interrupt count and end the interrupt */
        Prcb->InterruptCount++;
        KiEndInterrupt(Irql, TrapFrame);
    }

    /* Add the increment time to the shared data */
    InterruptTime.QuadPart = *(ULONGLONG*)&SharedUserData->InterruptTime;
    InterruptTime.QuadPart += Increment;
    KiWriteSystemTime(&SharedUserData->InterruptTime, InterruptTime);

    /* Check for timer expiration */
    KiCheckForTimerExpiration(Prcb, TrapFrame, InterruptTime);

    /* Update the tick offset */
    OldTickOffset = InterlockedExchangeAdd(&KiTickOffset, -(LONG)Increment);

    /* If the debugger is enabled, check for break-in request */
    if (KdDebuggerEnabled && KdPollBreakIn())
    {
        /* Break-in requested! */
        DbgBreakPointWithStatus(DBG_STATUS_CONTROL_C);
    }

    /* Check for full tick */
    if (OldTickOffset <= (LONG)Increment)
    {
        /* Update the system time */
        CurrentTime.QuadPart = *(ULONGLONG*)&SharedUserData->SystemTime;
        CurrentTime.QuadPart += KeTimeAdjustment;
        KiWriteSystemTime(&SharedUserData->SystemTime, CurrentTime);

        /* Update the tick count */
        CurrentTime.QuadPart = (*(ULONGLONG*)&KeTickCount) + 1;
        KiWriteSystemTime(&KeTickCount, CurrentTime);

        /* Update it in the shared user data */
        KiWriteSystemTime(&SharedUserData->TickCount, CurrentTime);

        /* Check for expiration with the new tick count as well */
        KiCheckForTimerExpiration(Prcb, TrapFrame, InterruptTime);

        /* Reset the tick offset */
        KiTickOffset += KeMaximumIncrement;

        /* Update processor/thread runtime */
        KeUpdateRunTime(TrapFrame, Irql);
    }
    else
    {
        /* Increase interrupt count only */
        Prcb->InterruptCount++;
    }

    /* Disable interrupts and end the interrupt */
    KiEndInterrupt(Irql, TrapFrame);
}

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