int *lengthPtr, Tcl_Encoding *encodingPtr);
MODULE_SCOPE void	TclpInitLock(void);
MODULE_SCOPE void	TclpInitPlatform(void);
MODULE_SCOPE void	TclpInitUnlock(void);
MODULE_SCOPE Tcl_Obj *	TclpObjListVolumes(void);
MODULE_SCOPE void	TclpMasterLock(void);
MODULE_SCOPE void	TclpMasterUnlock(void);
MODULE_SCOPE void	TclpMutexLock(void);
MODULE_SCOPE void	TclpMutexUnlock(void);
MODULE_SCOPE void	TclMutexUnlockAndFinalize(Tcl_Mutex *mutex);
MODULE_SCOPE int	TclpMatchFiles(Tcl_Interp *interp, char *separators,
			    Tcl_DString *dirPtr, char *pattern, char *tail);
MODULE_SCOPE int	TclpObjNormalizePath(Tcl_Interp *interp,
			    Tcl_Obj *pathPtr, int nextCheckpoint);
MODULE_SCOPE void	TclpNativeJoinPath(Tcl_Obj *prefix, const char *joining);
MODULE_SCOPE Tcl_Obj *	TclpNativeSplitPath(Tcl_Obj *pathPtr, int *lenPtr);
MODULE_SCOPE Tcl_PathType TclpGetNativePathType(Tcl_Obj *pathPtr,

    Tcl_Mutex *mutexPtr)
{
#ifdef TCL_THREADS
    TclpFinalizeMutex(mutexPtr);
#endif
    TclpMasterLock();
    ForgetSyncObject(mutexPtr, &mutexRecord);
    TclpMasterUnlock();
}

/*
 *----------------------------------------------------------------------
 *
 * TclMutexUnlockAndFinalize --
 *
 *	This procedure is invoked to unlock and then finalize a mutex.
 *	The mutex must have been locked by Tcl_MutexLock.  It is also
 *	removed from the list of remembered objects.  The mutex can no
 *	longer be used after calling this procedure.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Remove the mutex from the list.
 *
 *----------------------------------------------------------------------
 */

void
TclMutexUnlockAndFinalize(
    Tcl_Mutex *mutexPtr)
{
#ifdef TCL_THREADS
    Tcl_Mutex mutex;
#endif
    TclpMasterLock();
    TclpMutexLock();
#ifdef TCL_THREADS
    mutex = *mutexPtr;
    *mutexPtr = NULL; /* Force it to be created again. */
    Tcl_MutexUnlock(&mutex);
    TclpFinalizeMutex(&mutex);
#endif
    ForgetSyncObject(mutexPtr, &mutexRecord);
    TclpMutexUnlock();
    TclpMasterUnlock();
}

/*
 *----------------------------------------------------------------------
 *
 * TclRememberCondition

#define AT_FORK_INIT_VALUE 0
#define RESET_ATFORK_MUTEX 1
/*
 * tclUnixNotify.c --
 *
 *	This file contains the implementation of the select()-based
 *	Unix-specific notifier, which is the lowest-level part of the Tcl
 *	event loop. This file works together with generic/tclNotify.c.
 *

				 * fields. */
#ifdef __CYGWIN__
    void *event;     /* Any other thread alerts a notifier
	 * that an event is ready to be processed
	 * by sending this event. */
    void *hwnd;			/* Messaging window. */
#else /* !__CYGWIN__ */
    Tcl_Condition waitCV;	/* Any other thread alerts a notifier that an
    pthread_cond_t waitCV;	/* Any other thread alerts a notifier that an
				 * event is ready to be processed by signaling
				 * this condition variable. */
#endif /* __CYGWIN__ */
    int waitCVinitialized;  /* Variable to flag initialization of the structure */
    int eventReady;		/* True if an event is ready to be processed.
				 * Used as condition flag together with waitCV
				 * above. */
#endif /* TCL_THREADS */
} ThreadSpecificData;

static Tcl_ThreadDataKey dataKey;

#ifdef TCL_THREADS
/*
 * The following static indicates the number of threads that have initialized
 * 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.
 */

static int triggerPipe = -1;

/*
 * The notifierMutex locks access to all of the global notifier state.
 */

pthread_mutex_t notifierInitMutex = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t notifierMutex     = PTHREAD_MUTEX_INITIALIZER;
/*
 * The following static indicates if the notifier thread is running.
 *
 * You must hold the notifierInitMutex before accessing this variable.
 */
TCL_DECLARE_MUTEX(notifierMutex)

static int notifierThreadRunning = 0;

/*
 * The notifier thread signals the notifierCV when it has finished
 * initializing the triggerPipe and right before the notifier thread
 * terminates.
 */

static Tcl_Condition notifierCV;
static pthread_cond_t notifierCV = PTHREAD_COND_INITIALIZER;

/*
 * The pollState bits
 *	POLL_WANT is set by each thread before it waits on its condition
 *		variable. It is checked by the notifier before it does select.
 *	POLL_DONE is set by the notifier if it goes into select after seeing
 *		POLL_WANT. The idea is to ensure it tries a select with the

/*
 * Static routines defined in this file.
 */

#ifdef TCL_THREADS
static void	NotifierThreadProc(ClientData clientData);
#if defined(HAVE_PTHREAD_ATFORK) && !defined(__APPLE__) && !defined(__hpux)
static int	atForkInit = 0;
#if defined(HAVE_PTHREAD_ATFORK)
static int	atForkInit = AT_FORK_INIT_VALUE;
static void	AtForkPrepare(void);
static void	AtForkParent(void);
static void	AtForkChild(void);
#endif /* HAVE_PTHREAD_ATFORK */
#endif /* TCL_THREADS */
static int	FileHandlerEventProc(Tcl_Event *evPtr, int flags);


				    void *);
extern void __stdcall	PostQuitMessage(int);
extern void *__stdcall	RegisterClassW(const WNDCLASS *);
extern unsigned char __stdcall	ResetEvent(void *);
extern unsigned char __stdcall	TranslateMessage(const MSG *);

/*
 * Threaded-cygwin specific functions in this file:
 * Threaded-cygwin specific constants and functions in this file:
 */

static const WCHAR NotfyClassName[] = L"TclNotifier";
static DWORD __stdcall	NotifierProc(void *hwnd, unsigned int message,
			    void *wParam, void *lParam);
#endif /* TCL_THREADS && __CYGWIN__ */

#if TCL_THREADS
/*
 *----------------------------------------------------------------------
 *
 * StartNotifierThread --
 *
 *	Start a notfier thread and wait for the notifier pipe to be created.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Running Thread.
 *
 *----------------------------------------------------------------------
 */
static void
StartNotifierThread(const char *proc)
{
    if (!notifierThreadRunning) {
	pthread_mutex_lock(&notifierInitMutex);
	if (!notifierThreadRunning) {
	    if (TclpThreadCreate(&notifierThread, NotifierThreadProc, NULL,
		    TCL_THREAD_STACK_DEFAULT, TCL_THREAD_JOINABLE) != TCL_OK) {
		Tcl_Panic("%s: unable to start notifier thread", proc);
	    }

	    pthread_mutex_lock(&notifierMutex);
	    /*
	     * Wait for the notifier pipe to be created.
	     */

	    while (triggerPipe < 0) {
		pthread_cond_wait(&notifierCV, &notifierMutex);
	    }
	    pthread_mutex_unlock(&notifierMutex);

	    notifierThreadRunning = 1;
	}
	pthread_mutex_unlock(&notifierInitMutex);
    }
}
#endif /* TCL_THREADS */

/*
 *----------------------------------------------------------------------
 *
 * Tcl_InitNotifier --
 *
 *	Initializes the platform specific notifier state.
 *

    } else {
	ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

#ifdef TCL_THREADS
	tsdPtr->eventReady = 0;

	/*
	 * Start the Notifier thread if necessary.
	 * Initialize thread specific condition variable for this thread.
	 */
	if (tsdPtr->waitCVinitialized == 0) {
#ifdef __CYGWIN__
	    WNDCLASS class;

	    class.style = 0;
	    class.cbClsExtra = 0;
	    class.cbWndExtra = 0;
	    class.hInstance = TclWinGetTclInstance();
	    class.hbrBackground = NULL;
	    class.lpszMenuName = NULL;
	    class.lpszClassName = NotfyClassName;
	    class.lpfnWndProc = NotifierProc;
	    class.hIcon = NULL;
	    class.hCursor = NULL;

	    RegisterClassW(&class);
	    tsdPtr->hwnd = CreateWindowExW(NULL, class.lpszClassName,
		    class.lpszClassName, 0, 0, 0, 0, 0, NULL, NULL,
		    TclWinGetTclInstance(), NULL);
	    tsdPtr->event = CreateEventW(NULL, 1 /* manual */,
		    0 /* !signaled */, NULL);
#else
	    pthread_cond_init(&tsdPtr->waitCV, NULL);
#endif /* __CYGWIN__ */
	    tsdPtr->waitCVinitialized = 1;
	}

	Tcl_MutexLock(&notifierMutex);
#if defined(HAVE_PTHREAD_ATFORK) && !defined(__APPLE__) && !defined(__hpux)
	pthread_mutex_lock(&notifierInitMutex);
#if defined(HAVE_PTHREAD_ATFORK)
	/*
	 * Install pthread_atfork handlers to reinitialize the notifier in the
	 * Install pthread_atfork handlers to clean up the notifier in the
	 * child of a fork.
	 */

	if (!atForkInit) {
	    int result = pthread_atfork(AtForkPrepare, AtForkParent, AtForkChild);

	    if (result) {
		Tcl_Panic("Tcl_InitNotifier: pthread_atfork failed");
	    }
	    atForkInit = 1;
	}
#endif /* HAVE_PTHREAD_ATFORK */
	/*
	 * 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()) {
	    Tcl_ConditionFinalize(&notifierCV);
	    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.
	 */

	pthread_mutex_unlock(&notifierInitMutex);
	while (triggerPipe < 0) {
	    Tcl_ConditionWait(&notifierCV, &notifierMutex, NULL);
	}


	Tcl_MutexUnlock(&notifierMutex);
#endif /* TCL_THREADS */
	return tsdPtr;
    }
}

/*
 *----------------------------------------------------------------------

    if (tclNotifierHooks.finalizeNotifierProc) {
	tclNotifierHooks.finalizeNotifierProc(clientData);
	return;
    } else {
#ifdef TCL_THREADS
	ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

	Tcl_MutexLock(&notifierMutex);
	pthread_mutex_lock(&notifierInitMutex);
	notifierCount--;

	/*
	 * If this is the last thread to use the notifier, close the notifier
	 * pipe and wait for the background thread to terminate.
	 */

	if (notifierCount == 0) {
	    int result;

	    if (triggerPipe < 0) {
	    if (triggerPipe != -1) {
		Tcl_Panic("Tcl_FinalizeNotifier: %s",
			"notifier pipe not initialized");
	    }

	    /*
	     * Send "q" message to the notifier thread so that it will
	     * terminate. The notifier will return from its call to select()
	     * and notice that a "q" message has arrived, it will then close
	     * its side of the pipe and terminate its thread. Note the we can
	     * not just close the pipe and check for EOF in the notifier thread
	     * because if a background child process was created with exec,
	     * select() would not register the EOF on the pipe until the child
	     * processes had terminated. [Bug: 4139] [Bug: 1222872]
	     */

	    if (write(triggerPipe, "q", 1) != 1) {
		Tcl_Panic("Tcl_FinalizeNotifier: %s",
			"unable to write q to triggerPipe");
	    }
	    close(triggerPipe);
	    while(triggerPipe >= 0) {
		Tcl_ConditionWait(&notifierCV, &notifierMutex, NULL);
	    }
		if (write(triggerPipe, "q", 1) != 1) {
		    Tcl_Panic("Tcl_FinalizeNotifier: %s",
			    "unable to write q to triggerPipe");
		}
		close(triggerPipe);
		while(triggerPipe != -1) {
		    pthread_cond_wait(&notifierCV, &notifierMutex);
		}
		if (notifierThreadRunning) {
		    int result = pthread_join((pthread_t) notifierThread, NULL);

	    result = Tcl_JoinThread(notifierThread, NULL);
	    if (result) {
		Tcl_Panic("Tcl_FinalizeNotifier: %s",
			"unable to join notifier thread");
		    if (result) {
			Tcl_Panic("Tcl_FinalizeNotifier: unable to join notifier "
				"thread");
		    }
		    notifierThreadRunning = 0;
		}
	    }
	}

	/*
	 * Clean up any synchronization objects in the thread local storage.
	 */

#ifdef __CYGWIN__
	DestroyWindow(tsdPtr->hwnd);
	CloseHandle(tsdPtr->event);
#else /* __CYGWIN__ */
	Tcl_ConditionFinalize(&(tsdPtr->waitCV));
	pthread_cond_destroy(&tsdPtr->waitCV);
#endif /* __CYGWIN__ */
	tsdPtr->waitCVinitialized = 0;

	Tcl_MutexUnlock(&notifierMutex);
	pthread_mutex_unlock(&notifierInitMutex);
#endif /* TCL_THREADS */
    }
}

/*
 *----------------------------------------------------------------------
 *

    if (tclNotifierHooks.alertNotifierProc) {
	tclNotifierHooks.alertNotifierProc(clientData);
	return;
    } else {
#ifdef TCL_THREADS
	ThreadSpecificData *tsdPtr = clientData;

	Tcl_MutexLock(&notifierMutex);
	pthread_mutex_lock(&notifierMutex);
	tsdPtr->eventReady = 1;

#   ifdef __CYGWIN__
	PostMessageW(tsdPtr->hwnd, 1024, 0, 0);
#   else
	Tcl_ConditionNotify(&tsdPtr->waitCV);
	pthread_cond_broadcast(&tsdPtr->waitCV);
#   endif /* __CYGWIN__ */
	Tcl_MutexUnlock(&notifierMutex);
	pthread_mutex_unlock(&notifierMutex);
#endif /* TCL_THREADS */
    }
}

/*
 *----------------------------------------------------------------------
 *

Tcl_ServiceModeHook(
    int mode)			/* Either TCL_SERVICE_ALL, or
				 * TCL_SERVICE_NONE. */
{
    if (tclNotifierHooks.serviceModeHookProc) {
	tclNotifierHooks.serviceModeHookProc(mode);
	return;
    } else {
	/* Does nothing in this implementation. */
    } else if (mode == TCL_SERVICE_ALL) {
#if TCL_THREADS
	StartNotifierThread("Tcl_ServiceModeHook");
#endif
    }
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_CreateFileHandler --

     * Search through the file handlers to find the one whose handle matches
     * the event. We do this rather than keeping a pointer to the file handler
     * directly in the event, so that the handler can be deleted while the
     * event is queued without leaving a dangling pointer.
     */

    tsdPtr = TCL_TSD_INIT(&dataKey);

    for (filePtr = tsdPtr->firstFileHandlerPtr; filePtr != NULL;
	    filePtr = filePtr->nextPtr) {
	if (filePtr->fd != fileEvPtr->fd) {
	    continue;
	}

	/*

	} else {
	    timeoutPtr = NULL;
#endif /* !TCL_THREADS */
	}

#ifdef TCL_THREADS
	/*
	 * Place this thread on the list of interested threads, signal the
	 * notifier thread, and wait for a response or a timeout.
	 * Start notifier thread and place this thread on the list of
	 * interested threads, signal the notifier thread, and wait for a
	 * response or a timeout.
	 */

	StartNotifierThread("Tcl_WaitForEvent");
#ifdef __CYGWIN__
	if (!tsdPtr->hwnd) {
	    WNDCLASS class;

	    class.style = 0;
	    class.cbClsExtra = 0;
	    class.cbWndExtra = 0;
	    class.hInstance = TclWinGetTclInstance();
	    class.hbrBackground = NULL;
	    class.lpszMenuName = NULL;
	    class.lpszClassName = L"TclNotifier";
	    class.lpfnWndProc = NotifierProc;
	    class.hIcon = NULL;
	    class.hCursor = NULL;

	    RegisterClassW(&class);
	    tsdPtr->hwnd = CreateWindowExW(NULL, class.lpszClassName,
		    class.lpszClassName, 0, 0, 0, 0, 0, NULL, NULL,
		    TclWinGetTclInstance(), NULL);
	    tsdPtr->event = CreateEventW(NULL, 1 /* manual */,
		    0 /* !signaled */, NULL);
	}
#endif /* __CYGWIN */

	Tcl_MutexLock(&notifierMutex);
	pthread_mutex_lock(&notifierMutex);

	if (timePtr != NULL && timePtr->sec == 0 && (timePtr->usec == 0
#if defined(__APPLE__) && defined(__LP64__)
		/*
		 * On 64-bit Darwin, pthread_cond_timedwait() appears to have
		 * a bug that causes it to wait forever when passed an
		 * absolute time which has already been exceeded by the system

		DWORD timeout;

		if (timePtr) {
		    timeout = timePtr->sec * 1000 + timePtr->usec / 1000;
		} else {
		    timeout = 0xFFFFFFFF;
		}
		Tcl_MutexUnlock(&notifierMutex);
		pthread_mutex_unlock(&notifierMutex);
		MsgWaitForMultipleObjects(1, &tsdPtr->event, 0, timeout, 1279);
		Tcl_MutexLock(&notifierMutex);
		pthread_mutex_lock(&notifierMutex);
	    }
#else
	    if (timePtr != NULL) {
	       Tcl_Time now;
	       struct timespec ptime;

	       Tcl_GetTime(&now);
	       ptime.tv_sec = timePtr->sec + now.sec + (timePtr->usec + now.usec) / 1000000;
	       ptime.tv_nsec = 1000 * ((timePtr->usec + now.usec) % 1000000);

	       pthread_cond_timedwait(&tsdPtr->waitCV, &notifierMutex, &ptime);
	    } else {
	    Tcl_ConditionWait(&tsdPtr->waitCV, &notifierMutex, timePtr);
	       pthread_cond_wait(&tsdPtr->waitCV, &notifierMutex);
	    }
#endif /* __CYGWIN__ */
	}
	tsdPtr->eventReady = 0;

#ifdef __CYGWIN__
	while (PeekMessageW(&msg, NULL, 0, 0, 0)) {
	    /*

		fileEvPtr->header.proc = FileHandlerEventProc;
		fileEvPtr->fd = filePtr->fd;
		Tcl_QueueEvent((Tcl_Event *) fileEvPtr, TCL_QUEUE_TAIL);
	    }
	    filePtr->readyMask = mask;
	}
#ifdef TCL_THREADS
	Tcl_MutexUnlock(&notifierMutex);
	pthread_mutex_unlock(&notifierMutex);
#endif /* TCL_THREADS */
	return 0;
    }
}

#ifdef TCL_THREADS
/*

		"could not make trigger pipe close-on-exec");
    }

    /*
     * Install the write end of the pipe into the global variable.
     */

    Tcl_MutexLock(&notifierMutex);
    pthread_mutex_lock(&notifierMutex);
    triggerPipe = fds[1];

    /*
     * Signal any threads that are waiting.
     */

    Tcl_ConditionNotify(&notifierCV);
    Tcl_MutexUnlock(&notifierMutex);
    pthread_cond_broadcast(&notifierCV);
    pthread_mutex_unlock(&notifierMutex);

    /*
     * Look for file events and report them to interested threads.
     */

    while (1) {
	FD_ZERO(&readableMask);
	FD_ZERO(&writableMask);
	FD_ZERO(&exceptionMask);

	/*
	 * Compute the logical OR of the select masks from all the waiting
	 * notifiers.
	 */

	Tcl_MutexLock(&notifierMutex);
	pthread_mutex_lock(&notifierMutex);
	timePtr = NULL;
	for (tsdPtr = waitingListPtr; tsdPtr; tsdPtr = tsdPtr->nextPtr) {
	    for (i = tsdPtr->numFdBits-1; i >= 0; --i) {
		if (FD_ISSET(i, &tsdPtr->checkMasks.readable)) {
		    FD_SET(i, &readableMask);
		}
		if (FD_ISSET(i, &tsdPtr->checkMasks.writable)) {

		 * bits that were present when the thread tried to poll.
		 */

		tsdPtr->pollState |= POLL_DONE;
		timePtr = &poll;
	    }
	}
	Tcl_MutexUnlock(&notifierMutex);
	pthread_mutex_unlock(&notifierMutex);

	/*
	 * Set up the select mask to include the receive pipe.
	 */

	if (receivePipe >= numFdBits) {
	    numFdBits = receivePipe + 1;

	    continue;
	}

	/*
	 * Alert any threads that are waiting on a ready file descriptor.
	 */

	Tcl_MutexLock(&notifierMutex);
	pthread_mutex_lock(&notifierMutex);
	for (tsdPtr = waitingListPtr; tsdPtr; tsdPtr = tsdPtr->nextPtr) {
	    found = 0;

	    for (i = tsdPtr->numFdBits-1; i >= 0; --i) {
		if (FD_ISSET(i, &tsdPtr->checkMasks.readable)
			&& FD_ISSET(i, &readableMask)) {
		    FD_SET(i, &tsdPtr->readyMasks.readable);

		    tsdPtr->nextPtr = tsdPtr->prevPtr = NULL;
		    tsdPtr->onList = 0;
		    tsdPtr->pollState = 0;
		}
#ifdef __CYGWIN__
		PostMessageW(tsdPtr->hwnd, 1024, 0, 0);
#else /* __CYGWIN__ */
		Tcl_ConditionNotify(&tsdPtr->waitCV);
		pthread_cond_broadcast(&tsdPtr->waitCV);
#endif /* __CYGWIN__ */
	    }
	}
	Tcl_MutexUnlock(&notifierMutex);
	pthread_mutex_unlock(&notifierMutex);

	/*
	 * Consume the next byte from the notifier pipe if the pipe was
	 * readable. Note that there may be multiple bytes pending, but to
	 * avoid a race condition we only read one at a time.
	 */

    /*
     * Clean up the read end of the pipe and signal any threads waiting on
     * termination of the notifier thread.
     */

    close(receivePipe);
    Tcl_MutexLock(&notifierMutex);
    pthread_mutex_lock(&notifierMutex);
    triggerPipe = -1;
    Tcl_ConditionNotify(&notifierCV);
    Tcl_MutexUnlock(&notifierMutex);
    pthread_cond_broadcast(&notifierCV);
    pthread_mutex_unlock(&notifierMutex);

    TclpThreadExit(0);
}

#if defined(HAVE_PTHREAD_ATFORK) && !defined(__APPLE__) && !defined(__hpux)
#if defined(HAVE_PTHREAD_ATFORK)
/*
 *----------------------------------------------------------------------
 *
 * AtForkPrepare --
 *
 *	Lock the notifier in preparation for a fork.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static void
AtForkPrepare(void)
{
#if RESET_ATFORK_MUTEX == 0
    Tcl_MutexLock(&notifierMutex);
    pthread_mutex_lock(&notifierInitMutex);
    TclpMasterLock();
    TclpMutexLock();
#endif
}

/*
 *----------------------------------------------------------------------
 *
 * AtForkParent --
 *

 *
 *----------------------------------------------------------------------
 */

static void
AtForkParent(void)
{
    TclpMutexUnlock();
#if RESET_ATFORK_MUTEX == 0
    TclpMasterUnlock();
    Tcl_MutexUnlock(&notifierMutex);
    pthread_mutex_unlock(&notifierInitMutex);
#endif
}

/*
 *----------------------------------------------------------------------
 *
 * AtForkChild --
 *

 *
 *----------------------------------------------------------------------
 */

static void
AtForkChild(void)
{
    if (notifierThreadRunning == 1) {
	pthread_cond_destroy(&notifierCV);
    }
#if RESET_ATFORK_MUTEX == 0
    pthread_mutex_unlock(&notifierInitMutex);
#else
    pthread_mutex_init(&notifierInitMutex, NULL);
    pthread_mutex_init(&notifierMutex, NULL);
#endif
    pthread_cond_init(&notifierCV, NULL);
    TclpMutexUnlock();
    TclpMasterUnlock();
    TclMutexUnlockAndFinalize(&notifierMutex);

    /*
     * notifierThreadRunning == 1: thread is running, (there might be data in notifier lists)
     * atForkInit == 0: InitNotifier was never called
     * notifierCount != 0: unbalanced  InitNotifier() / FinalizeNotifier calls
     * waitingListPtr != 0: there are threads currently waiting for events.
     */

    if (atForkInit == 1) {

	notifierCount = 0;
	if (notifierThreadRunning == 1) {
	    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
	    notifierThreadRunning = 0;

	    close(triggerPipe);
	    triggerPipe = -1;
	    /*
	     * The waitingListPtr might contain event info from multiple
	     * threads, which are invalid here, so setting it to NULL is not
	     * unreasonable.
	     */
	    waitingListPtr = NULL;

	    /*
	     * The tsdPtr from before the fork is copied as well.  But since
	     * we are paranoic, we don't trust its condvar and reset it.
	     */
#ifdef __CYGWIN__
	    DestroyWindow(tsdPtr->hwnd);
	    tsdPtr->hwnd = CreateWindowExW(NULL, NotfyClassName,
		    NotfyClassName, 0, 0, 0, 0, 0, NULL, NULL,
		    TclWinGetTclInstance(), NULL);
	    ResetEvent(tsdPtr->event);
#else
	    pthread_cond_destroy(&tsdPtr->waitCV);
	    pthread_cond_init(&tsdPtr->waitCV, NULL);
#endif
	    /*
	     * In case, we had multiple threads running before the fork,
	     * make sure, we don't try to reach out to their thread local data.
	     */
	    tsdPtr->nextPtr = tsdPtr->prevPtr = NULL;

	    /*
	     * The list of registered event handlers at fork time is in
	     * tsdPtr->firstFileHandlerPtr;
	     */
	}
    }

    Tcl_InitNotifier();
}
#endif /* HAVE_PTHREAD_ATFORK */

#endif /* TCL_THREADS */

#endif /* !HAVE_COREFOUNDATION */

#endif
}


/*
 *----------------------------------------------------------------------
 *
 * TclpMutexLock
 *
 *	This procedure is used to grab a lock that serializes locking
 *	another mutex.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

void
TclpMutexLock(void)
{
#ifdef TCL_THREADS
    pthread_mutex_lock(&mutexLock);
#endif
}


/*
 *----------------------------------------------------------------------
 *
 * TclpMutexUnlock
 *
 *	This procedure is used to release a lock that serializes locking
 *	another mutex.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

void
TclpMutexUnlock(void)
{
#ifdef TCL_THREADS
    pthread_mutex_unlock(&mutexLock);
#endif
}


/*
 *----------------------------------------------------------------------
 *
 * Tcl_GetAllocMutex
 *
 *	This procedure returns a pointer to a statically initialized mutex for
 *	use by the memory allocator. The alloctor must use this lock, because
 *	all other locks are allocated...
 *
 * Results:

	    pthread_mutex_init(pmutexPtr, NULL);
	    *mutexPtr = (Tcl_Mutex)pmutexPtr;
	    TclRememberMutex(mutexPtr);
	}
	MASTER_UNLOCK;
    }
    while (1) {
	TclpMutexLock();
	pthread_mutex_lock(&mutexLock);
	pmutexPtr = *((pthread_mutex_t **)mutexPtr);
	if (pmutexPtr == NULL) {
	    TclpMutexUnlock();
	    pthread_mutex_unlock(&mutexLock);
	    goto retry;
	}
	if (pthread_mutex_trylock(pmutexPtr) == 0) {
	    TclpMutexUnlock();
	    pthread_mutex_unlock(&mutexLock);
	    return;
	}
	TclpMutexUnlock();
	pthread_mutex_unlock(&mutexLock);
	/*
	 * BUGBUG: All core and Thread package tests pass when usleep()
	 *         is used; however, the Thread package tests hang at
	 *         various places when Tcl_Sleep() is used, typically
	 *         while running test "thread-17.8", "thread-17.9", or
	 *         "thread-17.11a".  Really, what we want here is just
	 *         to yield to other threads for a while.

{
    LeaveCriticalSection(&masterLock);
}

/*
 *----------------------------------------------------------------------
 *
 * TclpMutexLock
 *
 *	This procedure is used to grab a lock that serializes locking
 *	another mutex.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

void
TclpMutexLock(void)
{
    EnterCriticalSection(&mutexLock);
}

/*
 *----------------------------------------------------------------------
 *
 * TclpMutexUnlock
 *
 *	This procedure is used to release a lock that serializes locking
 *	another mutex.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

void
TclpMutexUnlock(void)
{
    LeaveCriticalSection(&mutexLock);
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_GetAllocMutex
 *
 *	This procedure returns a pointer to a statically initialized mutex for
 *	use by the memory allocator. The alloctor must use this lock, because
 *	all other locks are allocated...
 *
 * Results:

	    InitializeCriticalSection(csPtr);
	    *mutexPtr = (Tcl_Mutex)csPtr;
	    TclRememberMutex(mutexPtr);
	}
	MASTER_UNLOCK;
    }
    while (1) {
	TclpMutexLock();
	EnterCriticalSection(&mutexLock);
	csPtr = *((CRITICAL_SECTION **)mutexPtr);
	if (csPtr == NULL) {
	    TclpMutexUnlock();
	    LeaveCriticalSection(&mutexLock);
	    goto retry;
	}
	if (TryEnterCriticalSection(csPtr)) {
	    TclpMutexUnlock();
	    LeaveCriticalSection(&mutexLock);
	    return;
	}
	TclpMutexUnlock();
	LeaveCriticalSection(&mutexLock);
	Tcl_Sleep(TCL_MUTEX_LOCK_SLEEP_TIME);
    }
}

/*
 *----------------------------------------------------------------------
 *