LONG NTAPI KeReleaseSemaphore	(	IN PKSEMAPHORE	Semaphore,
		IN KPRIORITY	Increment,
		IN LONG	Adjustment,
		IN BOOLEAN	Wait
	)

Definition at line 54 of file semphobj.c.

Referenced by CsqInsertIrp(), ExConvertExclusiveToSharedLite(), ExpReleaseOrWaitForKeyedEvent(), ExReleaseResourceForThreadLite(), FF_ReleaseSemaphore(), IssueUniqueIdChangeNotify(), KsGenerateEvent(), LpcpDestroyPortQueue(), MountMgrCheckUnprocessedVolumes(), MountMgrDeviceControl(), MountMgrMountedDeviceArrival(), MountMgrMountedDeviceRemoval(), MountMgrShutdown(), MountMgrUniqueIdChangeRoutine(), MountMgrUnload(), NtReleaseSemaphore(), NtSignalAndWaitForSingleObject(), QueueWorkItem(), ReleaseRemoteDatabaseSemaphore(), and RemoveWorkItem().

{
    LONG InitialState, State;
    KIRQL OldIrql;
    PKTHREAD CurrentThread;
    ASSERT_SEMAPHORE(Semaphore);
    ASSERT_IRQL_LESS_OR_EQUAL(DISPATCH_LEVEL);

    /* Lock the Dispatcher Database */
    OldIrql = KiAcquireDispatcherLock();

    /* Save the Old State and get new one */
    InitialState = Semaphore->Header.SignalState;
    State = InitialState + Adjustment;

    /* Check if the Limit was exceeded */
    if ((Semaphore->Limit < State) || (InitialState > State))
    {
        /* Raise an error if it was exceeded */
        KiReleaseDispatcherLock(OldIrql);
        ExRaiseStatus(STATUS_SEMAPHORE_LIMIT_EXCEEDED);
    }

    /* Now set the new state */
    Semaphore->Header.SignalState = State;

    /* Check if we should wake it */
    if (!(InitialState) && !(IsListEmpty(&Semaphore->Header.WaitListHead)))
    {
        /* Wake the Semaphore */
        KiWaitTest(&Semaphore->Header, Increment);
    }

    /* Check if the caller wants to wait after this release */
    if (Wait == FALSE)
    {
        /* Release the Lock */
        KiReleaseDispatcherLock(OldIrql);
    }
    else
    {
        /* Set a wait */
        CurrentThread = KeGetCurrentThread();
        CurrentThread->WaitNext = TRUE;
        CurrentThread->WaitIrql = OldIrql;
    }

    /* Return the previous state */
    return InitialState;
}

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