NTSTATUS NTAPI RtlDeregisterWaitEx	(	HANDLE	WaitHandle,
		HANDLE	CompletionEvent
	)
Definition at line 199 of file wait.c.
{
    PRTLP_WAIT Wait = (PRTLP_WAIT) WaitHandle;
    NTSTATUS Status = STATUS_SUCCESS;

    //TRACE( "(%p)\n", WaitHandle );

    NtSetEvent( Wait->CancelEvent, NULL );
    if (Wait->CallbackInProgress)
    {
        if (CompletionEvent != NULL)
        {
            if (CompletionEvent == INVALID_HANDLE_VALUE)
            {
                Status = NtCreateEvent( &CompletionEvent,
                                         EVENT_ALL_ACCESS,
                                         NULL,
                                         TRUE,
                                         FALSE );

                if (Status != STATUS_SUCCESS)
                    return Status;

                (void)InterlockedExchangePointer( &Wait->CompletionEvent, CompletionEvent );

                if (Wait->CallbackInProgress)
                    NtWaitForSingleObject( CompletionEvent, FALSE, NULL );

                NtClose( CompletionEvent );
            }
            else
            {
                (void)InterlockedExchangePointer( &Wait->CompletionEvent, CompletionEvent );

                if (Wait->CallbackInProgress)
                    Status = STATUS_PENDING;
            }
        }
        else
            Status = STATUS_PENDING;
    }

    if (InterlockedIncrement( &Wait->DeleteCount ) == 2 )
    {
        Status = STATUS_SUCCESS;
        NtClose( Wait->CancelEvent );
        RtlFreeHeap( RtlGetProcessHeap(), 0, Wait );
    }

    return Status;
}
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