* notifiers.
 *
 * You must hold the notifierMutex lock before accessing this variable.
 */

static int notifierCount = 0;

/*
 * The following static stores the process ID of the initialized notifier
 * thread. If it changes, we have passed a fork and we should start a new
 * notifier thread.
 *
 * You must hold the notifierMutex lock before accessing this variable.
 */
static pid_t processIDInitialized = 0;

/*
 * The following variable points to the head of a doubly-linked list of
 * ThreadSpecificData structures for all threads that are currently waiting on
 * an event.
 *
 * You must hold the notifierMutex lock before accessing this list.
 */

	tsdPtr->eventReady = 0;

	/*
	 * Start the Notifier thread if necessary.
	 */

	Tcl_MutexLock(&notifierMutex);
	/*
	 * Check if my process id changed, e.g. I was forked
	 * In this case, restart the notifier thread and close the
	 * pipe to the original notifier thread
	 */
	if (notifierCount > 0 && processIDInitialized != getpid()) {
	    notifierCount = 0;
	    processIDInitialized = 0;
	    close(triggerPipe);
	    triggerPipe = -1;
	}
	if (notifierCount == 0) {
	    if (TclpThreadCreate(&notifierThread, NotifierThreadProc, NULL,
		    TCL_THREAD_STACK_DEFAULT, TCL_THREAD_JOINABLE) != TCL_OK) {
		Tcl_Panic("Tcl_InitNotifier: unable to start notifier thread");
	    }
	    processIDInitialized = getpid();
	}
	notifierCount++;

	/*
	 * Wait for the notifier pipe to be created.
	 */