diff options
Diffstat (limited to 'unix/tclUnixNotfy.c')
| -rw-r--r-- | unix/tclUnixNotfy.c | 808 |
1 files changed, 410 insertions, 398 deletions
diff --git a/unix/tclUnixNotfy.c b/unix/tclUnixNotfy.c index e21e744..d93f24e 100644 --- a/unix/tclUnixNotfy.c +++ b/unix/tclUnixNotfy.c @@ -17,14 +17,6 @@ #include <signal.h> /* - * This code does deep stub magic to allow replacement of the notifier at - * runtime. - */ - -extern TclStubs tclStubs; -extern Tcl_NotifierProcs tclOriginalNotifier; - -/* * This structure is used to keep track of the notifier info for a registered * file. */ @@ -236,7 +228,7 @@ typedef struct { void *hCursor; void *hbrBackground; void *lpszMenuName; - void *lpszClassName; + const void *lpszClassName; } WNDCLASS; extern void __stdcall CloseHandle(void *); @@ -285,63 +277,67 @@ static DWORD __stdcall NotifierProc(void *hwnd, unsigned int message, ClientData Tcl_InitNotifier(void) { - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); + if (tclNotifierHooks.initNotifierProc) { + return tclNotifierHooks.initNotifierProc(); + } else { + ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); #ifdef TCL_THREADS - tsdPtr->eventReady = 0; + tsdPtr->eventReady = 0; - /* - * Start the Notifier thread if necessary. - */ + /* + * Start the Notifier thread if necessary. + */ - Tcl_MutexLock(¬ifierMutex); + Tcl_MutexLock(¬ifierMutex); #if defined(HAVE_PTHREAD_ATFORK) && !defined(__APPLE__) && !defined(__hpux) - /* - * Install pthread_atfork handlers to reinitialize the notifier in the - * child of a fork. - */ + /* + * Install pthread_atfork handlers to reinitialize the notifier in the + * child of a fork. + */ - if (!atForkInit) { - int result = pthread_atfork(AtForkPrepare, AtForkParent, AtForkChild); + if (!atForkInit) { + int result = pthread_atfork(AtForkPrepare, AtForkParent, AtForkChild); - if (result) { - Tcl_Panic("Tcl_InitNotifier: pthread_atfork failed"); + if (result) { + Tcl_Panic("Tcl_InitNotifier: pthread_atfork failed"); + } + atForkInit = 1; } - 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(¬ifierCV); - notifierCount = 0; - processIDInitialized = 0; - close(triggerPipe); - triggerPipe = -1; - } - if (notifierCount == 0) { - if (TclpThreadCreate(¬ifierThread, NotifierThreadProc, NULL, - TCL_THREAD_STACK_DEFAULT, TCL_THREAD_JOINABLE) != TCL_OK) { - Tcl_Panic("Tcl_InitNotifier: unable to start notifier thread"); + /* + * 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(¬ifierCV); + notifierCount = 0; + processIDInitialized = 0; + close(triggerPipe); + triggerPipe = -1; } - processIDInitialized = getpid(); - } - notifierCount++; + if (notifierCount == 0) { + if (TclpThreadCreate(¬ifierThread, 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. - */ + /* + * Wait for the notifier pipe to be created. + */ - while (triggerPipe < 0) { - Tcl_ConditionWait(¬ifierCV, ¬ifierMutex, NULL); - } + while (triggerPipe < 0) { + Tcl_ConditionWait(¬ifierCV, ¬ifierMutex, NULL); + } - Tcl_MutexUnlock(¬ifierMutex); + Tcl_MutexUnlock(¬ifierMutex); #endif /* TCL_THREADS */ - return (ClientData) tsdPtr; + return tsdPtr; + } } /* @@ -366,64 +362,69 @@ void Tcl_FinalizeNotifier( ClientData clientData) /* Not used. */ { + if (tclNotifierHooks.finalizeNotifierProc) { + tclNotifierHooks.finalizeNotifierProc(clientData); + return; + } else { #ifdef TCL_THREADS - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); + ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - Tcl_MutexLock(¬ifierMutex); - notifierCount--; + Tcl_MutexLock(¬ifierMutex); + notifierCount--; - /* - * If this is the last thread to use the notifier, close the notifier - * pipe and wait for the background thread to terminate. - */ + /* + * 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 (notifierCount == 0) { + int result; - if (triggerPipe < 0) { - Tcl_Panic("Tcl_FinalizeNotifier: %s", - "notifier pipe not initialized"); - } + if (triggerPipe < 0) { + 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] - */ + /* + * 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(¬ifierCV, ¬ifierMutex, NULL); - } + if (write(triggerPipe, "q", 1) != 1) { + Tcl_Panic("Tcl_FinalizeNotifier: %s", + "unable to write q to triggerPipe"); + } + close(triggerPipe); + while(triggerPipe >= 0) { + Tcl_ConditionWait(¬ifierCV, ¬ifierMutex, NULL); + } - result = Tcl_JoinThread(notifierThread, NULL); - if (result) { - Tcl_Panic("Tcl_FinalizeNotifier: %s", - "unable to join notifier thread"); + result = Tcl_JoinThread(notifierThread, NULL); + if (result) { + Tcl_Panic("Tcl_FinalizeNotifier: %s", + "unable to join notifier thread"); + } } - } - /* - * Clean up any synchronization objects in the thread local storage. - */ + /* + * Clean up any synchronization objects in the thread local storage. + */ #ifdef __CYGWIN__ - CloseHandle(tsdPtr->event); + CloseHandle(tsdPtr->event); #else /* __CYGWIN__ */ - Tcl_ConditionFinalize(&(tsdPtr->waitCV)); + Tcl_ConditionFinalize(&(tsdPtr->waitCV)); #endif /* __CYGWIN__ */ - Tcl_MutexUnlock(¬ifierMutex); + Tcl_MutexUnlock(¬ifierMutex); #endif /* TCL_THREADS */ + } } /* @@ -449,18 +450,23 @@ void Tcl_AlertNotifier( ClientData clientData) { + if (tclNotifierHooks.alertNotifierProc) { + tclNotifierHooks.alertNotifierProc(clientData); + return; + } else { #ifdef TCL_THREADS - ThreadSpecificData *tsdPtr = (ThreadSpecificData *) clientData; + ThreadSpecificData *tsdPtr = clientData; - Tcl_MutexLock(¬ifierMutex); - tsdPtr->eventReady = 1; -#ifdef __CYGWIN__ - PostMessageW(tsdPtr->hwnd, 1024, 0, 0); -#else /* __CYGWIN__ */ - Tcl_ConditionNotify(&tsdPtr->waitCV); -#endif /* __CYGWIN__ */ - Tcl_MutexUnlock(¬ifierMutex); + Tcl_MutexLock(¬ifierMutex); + tsdPtr->eventReady = 1; +# ifdef __CYGWIN__ + PostMessageW(tsdPtr->hwnd, 1024, 0, 0); +# else + Tcl_ConditionNotify(&tsdPtr->waitCV); +# endif /* __CYGWIN__ */ + Tcl_MutexUnlock(¬ifierMutex); #endif /* TCL_THREADS */ + } } /* @@ -483,16 +489,17 @@ Tcl_AlertNotifier( void Tcl_SetTimer( - Tcl_Time *timePtr) /* Timeout value, may be NULL. */ + const Tcl_Time *timePtr) /* Timeout value, may be NULL. */ { - /* - * The interval timer doesn't do anything in this implementation, - * because the only event loop is via Tcl_DoOneEvent, which passes - * timeout values to Tcl_WaitForEvent. - */ - - if (tclStubs.tcl_SetTimer != tclOriginalNotifier.setTimerProc) { - tclStubs.tcl_SetTimer(timePtr); + if (tclNotifierHooks.setTimerProc) { + tclNotifierHooks.setTimerProc(timePtr); + return; + } else { + /* + * The interval timer doesn't do anything in this implementation, + * because the only event loop is via Tcl_DoOneEvent, which passes + * timeout values to Tcl_WaitForEvent. + */ } } @@ -517,6 +524,12 @@ 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. */ + } } /* @@ -546,53 +559,52 @@ Tcl_CreateFileHandler( * event. */ ClientData clientData) /* Arbitrary data to pass to proc. */ { - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - FileHandler *filePtr; - - if (tclStubs.tcl_CreateFileHandler != - tclOriginalNotifier.createFileHandlerProc) { - tclStubs.tcl_CreateFileHandler(fd, mask, proc, clientData); + if (tclNotifierHooks.createFileHandlerProc) { + tclNotifierHooks.createFileHandlerProc(fd, mask, proc, clientData); return; - } + } else { + ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); + FileHandler *filePtr; - for (filePtr = tsdPtr->firstFileHandlerPtr; filePtr != NULL; - filePtr = filePtr->nextPtr) { - if (filePtr->fd == fd) { - break; + for (filePtr = tsdPtr->firstFileHandlerPtr; filePtr != NULL; + filePtr = filePtr->nextPtr) { + if (filePtr->fd == fd) { + break; + } } - } - if (filePtr == NULL) { - filePtr = (FileHandler*) ckalloc(sizeof(FileHandler)); - filePtr->fd = fd; - filePtr->readyMask = 0; - filePtr->nextPtr = tsdPtr->firstFileHandlerPtr; - tsdPtr->firstFileHandlerPtr = filePtr; - } - filePtr->proc = proc; - filePtr->clientData = clientData; - filePtr->mask = mask; + if (filePtr == NULL) { + filePtr = ckalloc(sizeof(FileHandler)); + filePtr->fd = fd; + filePtr->readyMask = 0; + filePtr->nextPtr = tsdPtr->firstFileHandlerPtr; + tsdPtr->firstFileHandlerPtr = filePtr; + } + filePtr->proc = proc; + filePtr->clientData = clientData; + filePtr->mask = mask; - /* - * Update the check masks for this file. - */ + /* + * Update the check masks for this file. + */ - if (mask & TCL_READABLE) { - FD_SET(fd, &tsdPtr->checkMasks.readable); - } else { - FD_CLR(fd, &tsdPtr->checkMasks.readable); - } - if (mask & TCL_WRITABLE) { - FD_SET(fd, &tsdPtr->checkMasks.writable); - } else { - FD_CLR(fd, &tsdPtr->checkMasks.writable); - } - if (mask & TCL_EXCEPTION) { - FD_SET(fd, &tsdPtr->checkMasks.exception); - } else { - FD_CLR(fd, &tsdPtr->checkMasks.exception); - } - if (tsdPtr->numFdBits <= fd) { - tsdPtr->numFdBits = fd+1; + if (mask & TCL_READABLE) { + FD_SET(fd, &tsdPtr->checkMasks.readable); + } else { + FD_CLR(fd, &tsdPtr->checkMasks.readable); + } + if (mask & TCL_WRITABLE) { + FD_SET(fd, &tsdPtr->checkMasks.writable); + } else { + FD_CLR(fd, &tsdPtr->checkMasks.writable); + } + if (mask & TCL_EXCEPTION) { + FD_SET(fd, &tsdPtr->checkMasks.exception); + } else { + FD_CLR(fd, &tsdPtr->checkMasks.exception); + } + if (tsdPtr->numFdBits <= fd) { + tsdPtr->numFdBits = fd+1; + } } } @@ -617,72 +629,71 @@ Tcl_DeleteFileHandler( int fd) /* Stream id for which to remove callback * function. */ { - FileHandler *filePtr, *prevPtr; - int i; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - if (tclStubs.tcl_DeleteFileHandler != - tclOriginalNotifier.deleteFileHandlerProc) { - tclStubs.tcl_DeleteFileHandler(fd); + if (tclNotifierHooks.deleteFileHandlerProc) { + tclNotifierHooks.deleteFileHandlerProc(fd); return; - } + } else { + FileHandler *filePtr, *prevPtr; + int i; + ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - /* - * Find the entry for the given file (and return if there isn't one). - */ + /* + * Find the entry for the given file (and return if there isn't one). + */ - for (prevPtr = NULL, filePtr = tsdPtr->firstFileHandlerPtr; ; - prevPtr = filePtr, filePtr = filePtr->nextPtr) { - if (filePtr == NULL) { - return; - } - if (filePtr->fd == fd) { - break; + for (prevPtr = NULL, filePtr = tsdPtr->firstFileHandlerPtr; ; + prevPtr = filePtr, filePtr = filePtr->nextPtr) { + if (filePtr == NULL) { + return; + } + if (filePtr->fd == fd) { + break; + } } - } - /* - * Update the check masks for this file. - */ + /* + * Update the check masks for this file. + */ - if (filePtr->mask & TCL_READABLE) { - FD_CLR(fd, &tsdPtr->checkMasks.readable); - } - if (filePtr->mask & TCL_WRITABLE) { - FD_CLR(fd, &tsdPtr->checkMasks.writable); - } - if (filePtr->mask & TCL_EXCEPTION) { - FD_CLR(fd, &tsdPtr->checkMasks.exception); - } + if (filePtr->mask & TCL_READABLE) { + FD_CLR(fd, &tsdPtr->checkMasks.readable); + } + if (filePtr->mask & TCL_WRITABLE) { + FD_CLR(fd, &tsdPtr->checkMasks.writable); + } + if (filePtr->mask & TCL_EXCEPTION) { + FD_CLR(fd, &tsdPtr->checkMasks.exception); + } - /* - * Find current max fd. - */ + /* + * Find current max fd. + */ - if (fd+1 == tsdPtr->numFdBits) { - int numFdBits = 0; + if (fd+1 == tsdPtr->numFdBits) { + int numFdBits = 0; - for (i = fd-1; i >= 0; i--) { - if (FD_ISSET(i, &tsdPtr->checkMasks.readable) - || FD_ISSET(i, &tsdPtr->checkMasks.writable) - || FD_ISSET(i, &tsdPtr->checkMasks.exception)) { - numFdBits = i+1; - break; + for (i = fd-1; i >= 0; i--) { + if (FD_ISSET(i, &tsdPtr->checkMasks.readable) + || FD_ISSET(i, &tsdPtr->checkMasks.writable) + || FD_ISSET(i, &tsdPtr->checkMasks.exception)) { + numFdBits = i+1; + break; + } } + tsdPtr->numFdBits = numFdBits; } - tsdPtr->numFdBits = numFdBits; - } - /* - * Clean up information in the callback record. - */ + /* + * Clean up information in the callback record. + */ - if (prevPtr == NULL) { - tsdPtr->firstFileHandlerPtr = filePtr->nextPtr; - } else { - prevPtr->nextPtr = filePtr->nextPtr; + if (prevPtr == NULL) { + tsdPtr->firstFileHandlerPtr = filePtr->nextPtr; + } else { + prevPtr->nextPtr = filePtr->nextPtr; + } + ckfree(filePtr); } - ckfree((char *) filePtr); } /* @@ -803,74 +814,73 @@ NotifierProc( int Tcl_WaitForEvent( - Tcl_Time *timePtr) /* Maximum block time, or NULL. */ + const Tcl_Time *timePtr) /* Maximum block time, or NULL. */ { - FileHandler *filePtr; - int mask; - Tcl_Time vTime; + if (tclNotifierHooks.waitForEventProc) { + return tclNotifierHooks.waitForEventProc(timePtr); + } else { + FileHandler *filePtr; + int mask; + Tcl_Time vTime; #ifdef TCL_THREADS - int waitForFiles; -#ifdef __CYGWIN__ - MSG msg; -#endif /* __CYGWIN__ */ + int waitForFiles; +# ifdef __CYGWIN__ + MSG msg; +# endif /* __CYGWIN__ */ #else - /* - * Impl. notes: timeout & timeoutPtr are used if, and only if threads - * are not enabled. They are the arguments for the regular select() - * used when the core is not thread-enabled. - */ + /* + * Impl. notes: timeout & timeoutPtr are used if, and only if threads + * are not enabled. They are the arguments for the regular select() + * used when the core is not thread-enabled. + */ - struct timeval timeout, *timeoutPtr; - int numFound; + struct timeval timeout, *timeoutPtr; + int numFound; #endif /* TCL_THREADS */ - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - if (tclStubs.tcl_WaitForEvent != tclOriginalNotifier.waitForEventProc) { - return tclStubs.tcl_WaitForEvent(timePtr); - } - - /* - * Set up the timeout structure. Note that if there are no events to - * check for, we return with a negative result rather than blocking - * forever. - */ + ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - if (timePtr != NULL) { /* - * TIP #233 (Virtualized Time). Is virtual time in effect? And do - * we actually have something to scale? If yes to both then we - * call the handler to do this scaling. + * Set up the timeout structure. Note that if there are no events to + * check for, we return with a negative result rather than blocking + * forever. */ - if (timePtr->sec != 0 || timePtr->usec != 0) { - vTime = *timePtr; - tclScaleTimeProcPtr(&vTime, tclTimeClientData); - timePtr = &vTime; - } + if (timePtr != NULL) { + /* + * TIP #233 (Virtualized Time). Is virtual time in effect? And do + * we actually have something to scale? If yes to both then we + * call the handler to do this scaling. + */ + + if (timePtr->sec != 0 || timePtr->usec != 0) { + vTime = *timePtr; + tclScaleTimeProcPtr(&vTime, tclTimeClientData); + timePtr = &vTime; + } #ifndef TCL_THREADS - timeout.tv_sec = timePtr->sec; - timeout.tv_usec = timePtr->usec; - timeoutPtr = &timeout; - } else if (tsdPtr->numFdBits == 0) { - /* - * If there are no threads, no timeout, and no fds registered, - * then there are no events possible and we must avoid deadlock. - * Note that this is not entirely correct because there might be a - * signal that could interrupt the select call, but we don't - * handle that case if we aren't using threads. - */ + timeout.tv_sec = timePtr->sec; + timeout.tv_usec = timePtr->usec; + timeoutPtr = &timeout; + } else if (tsdPtr->numFdBits == 0) { + /* + * If there are no threads, no timeout, and no fds registered, + * then there are no events possible and we must avoid deadlock. + * Note that this is not entirely correct because there might be a + * signal that could interrupt the select call, but we don't + * handle that case if we aren't using threads. + */ - return -1; - } else { - timeoutPtr = NULL; + return -1; + } 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. - */ + /* + * Place this thread on the list of interested threads, signal the + * notifier thread, and wait for a response or a timeout. + */ #ifdef __CYGWIN__ if (!tsdPtr->hwnd) { @@ -894,183 +904,185 @@ Tcl_WaitForEvent( tsdPtr->event = CreateEventW(NULL, 1 /* manual */, 0 /* !signaled */, NULL); } -#endif /* __CYGWIN__ */ +#endif /* __CYGWIN */ - Tcl_MutexLock(¬ifierMutex); + Tcl_MutexLock(¬ifierMutex); - if (timePtr != NULL && timePtr->sec == 0 && (timePtr->usec == 0 + 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 + * time; as a workaround, when given a very brief timeout, + * just do a poll. [Bug 1457797] + */ + || timePtr->usec < 10 +#endif /* __APPLE__ && __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 - * time; as a workaround, when given a very brief timeout, - * just do a poll. [Bug 1457797] + * Cannot emulate a polling select with a polling condition + * variable. Instead, pretend to wait for files and tell the + * notifier thread what we are doing. The notifier thread makes + * sure it goes through select with its select mask in the same + * state as ours currently is. We block until that happens. */ - || timePtr->usec < 10 -#endif /* __APPLE__ && __LP64__ */ - )) { - /* - * Cannot emulate a polling select with a polling condition - * variable. Instead, pretend to wait for files and tell the - * notifier thread what we are doing. The notifier thread makes - * sure it goes through select with its select mask in the same - * state as ours currently is. We block until that happens. - */ - waitForFiles = 1; - tsdPtr->pollState = POLL_WANT; - timePtr = NULL; - } else { - waitForFiles = (tsdPtr->numFdBits > 0); - tsdPtr->pollState = 0; - } + waitForFiles = 1; + tsdPtr->pollState = POLL_WANT; + timePtr = NULL; + } else { + waitForFiles = (tsdPtr->numFdBits > 0); + tsdPtr->pollState = 0; + } - if (waitForFiles) { - /* - * Add the ThreadSpecificData structure of this thread to the list - * of ThreadSpecificData structures of all threads that are - * waiting on file events. - */ + if (waitForFiles) { + /* + * Add the ThreadSpecificData structure of this thread to the list + * of ThreadSpecificData structures of all threads that are + * waiting on file events. + */ - tsdPtr->nextPtr = waitingListPtr; - if (waitingListPtr) { - waitingListPtr->prevPtr = tsdPtr; - } - tsdPtr->prevPtr = 0; - waitingListPtr = tsdPtr; - tsdPtr->onList = 1; + tsdPtr->nextPtr = waitingListPtr; + if (waitingListPtr) { + waitingListPtr->prevPtr = tsdPtr; + } + tsdPtr->prevPtr = 0; + waitingListPtr = tsdPtr; + tsdPtr->onList = 1; - if ((write(triggerPipe, "", 1) == -1) && (errno != EAGAIN)) { - Tcl_Panic("Tcl_WaitForEvent: %s", - "unable to write to triggerPipe"); + if ((write(triggerPipe, "", 1) == -1) && (errno != EAGAIN)) { + Tcl_Panic("Tcl_WaitForEvent: %s", + "unable to write to triggerPipe"); + } } - } - FD_ZERO(&tsdPtr->readyMasks.readable); - FD_ZERO(&tsdPtr->readyMasks.writable); - FD_ZERO(&tsdPtr->readyMasks.exception); + FD_ZERO(&tsdPtr->readyMasks.readable); + FD_ZERO(&tsdPtr->readyMasks.writable); + FD_ZERO(&tsdPtr->readyMasks.exception); - if (!tsdPtr->eventReady) { + if (!tsdPtr->eventReady) { #ifdef __CYGWIN__ - if (!PeekMessageW(&msg, NULL, 0, 0, 0)) { - DWORD timeout; + if (!PeekMessageW(&msg, NULL, 0, 0, 0)) { + DWORD timeout; - if (timePtr) { - timeout = timePtr->sec * 1000 + timePtr->usec / 1000; - } else { - timeout = 0xFFFFFFFF; + if (timePtr) { + timeout = timePtr->sec * 1000 + timePtr->usec / 1000; + } else { + timeout = 0xFFFFFFFF; + } + Tcl_MutexUnlock(¬ifierMutex); + MsgWaitForMultipleObjects(1, &tsdPtr->event, 0, timeout, 1279); + Tcl_MutexLock(¬ifierMutex); } - Tcl_MutexUnlock(¬ifierMutex); - MsgWaitForMultipleObjects(1, &tsdPtr->event, 0, timeout, 1279); - Tcl_MutexLock(¬ifierMutex); - } #else - Tcl_ConditionWait(&tsdPtr->waitCV, ¬ifierMutex, timePtr); + Tcl_ConditionWait(&tsdPtr->waitCV, ¬ifierMutex, timePtr); #endif /* __CYGWIN__ */ - } - tsdPtr->eventReady = 0; + } + tsdPtr->eventReady = 0; #ifdef __CYGWIN__ - while (PeekMessageW(&msg, NULL, 0, 0, 0)) { - /* - * Retrieve and dispatch the message. - */ + while (PeekMessageW(&msg, NULL, 0, 0, 0)) { + /* + * Retrieve and dispatch the message. + */ - DWORD result = GetMessageW(&msg, NULL, 0, 0); + DWORD result = GetMessageW(&msg, NULL, 0, 0); - if (result == 0) { - PostQuitMessage(msg.wParam); - /* What to do here? */ - } else if (result != (DWORD) -1) { - TranslateMessage(&msg); - DispatchMessageW(&msg); + if (result == 0) { + PostQuitMessage(msg.wParam); + /* What to do here? */ + } else if (result != (DWORD) -1) { + TranslateMessage(&msg); + DispatchMessageW(&msg); + } } - } - ResetEvent(tsdPtr->event); + ResetEvent(tsdPtr->event); #endif /* __CYGWIN__ */ - if (waitForFiles && tsdPtr->onList) { - /* - * Remove the ThreadSpecificData structure of this thread from the - * waiting list. Alert the notifier thread to recompute its select - * masks - skipping this caused a hang when trying to close a pipe - * which the notifier thread was still doing a select on. - */ + if (waitForFiles && tsdPtr->onList) { + /* + * Remove the ThreadSpecificData structure of this thread from the + * waiting list. Alert the notifier thread to recompute its select + * masks - skipping this caused a hang when trying to close a pipe + * which the notifier thread was still doing a select on. + */ - if (tsdPtr->prevPtr) { - tsdPtr->prevPtr->nextPtr = tsdPtr->nextPtr; - } else { - waitingListPtr = tsdPtr->nextPtr; - } - if (tsdPtr->nextPtr) { - tsdPtr->nextPtr->prevPtr = tsdPtr->prevPtr; - } - tsdPtr->nextPtr = tsdPtr->prevPtr = NULL; - tsdPtr->onList = 0; - if ((write(triggerPipe, "", 1) == -1) && (errno != EAGAIN)) { - Tcl_Panic("Tcl_WaitForEvent: %s", - "unable to write to triggerPipe"); + if (tsdPtr->prevPtr) { + tsdPtr->prevPtr->nextPtr = tsdPtr->nextPtr; + } else { + waitingListPtr = tsdPtr->nextPtr; + } + if (tsdPtr->nextPtr) { + tsdPtr->nextPtr->prevPtr = tsdPtr->prevPtr; + } + tsdPtr->nextPtr = tsdPtr->prevPtr = NULL; + tsdPtr->onList = 0; + if ((write(triggerPipe, "", 1) == -1) && (errno != EAGAIN)) { + Tcl_Panic("Tcl_WaitForEvent: %s", + "unable to write to triggerPipe"); + } } - } #else - tsdPtr->readyMasks = tsdPtr->checkMasks; - numFound = select(tsdPtr->numFdBits, &tsdPtr->readyMasks.readable, - &tsdPtr->readyMasks.writable, &tsdPtr->readyMasks.exception, - timeoutPtr); + tsdPtr->readyMasks = tsdPtr->checkMasks; + numFound = select(tsdPtr->numFdBits, &tsdPtr->readyMasks.readable, + &tsdPtr->readyMasks.writable, &tsdPtr->readyMasks.exception, + timeoutPtr); - /* - * Some systems don't clear the masks after an error, so we have to do - * it here. - */ + /* + * Some systems don't clear the masks after an error, so we have to do + * it here. + */ - if (numFound == -1) { - FD_ZERO(&tsdPtr->readyMasks.readable); - FD_ZERO(&tsdPtr->readyMasks.writable); - FD_ZERO(&tsdPtr->readyMasks.exception); - } + if (numFound == -1) { + FD_ZERO(&tsdPtr->readyMasks.readable); + FD_ZERO(&tsdPtr->readyMasks.writable); + FD_ZERO(&tsdPtr->readyMasks.exception); + } #endif /* TCL_THREADS */ - /* - * Queue all detected file events before returning. - */ + /* + * Queue all detected file events before returning. + */ - for (filePtr = tsdPtr->firstFileHandlerPtr; (filePtr != NULL); - filePtr = filePtr->nextPtr) { - mask = 0; - if (FD_ISSET(filePtr->fd, &tsdPtr->readyMasks.readable)) { - mask |= TCL_READABLE; - } - if (FD_ISSET(filePtr->fd, &tsdPtr->readyMasks.writable)) { - mask |= TCL_WRITABLE; - } - if (FD_ISSET(filePtr->fd, &tsdPtr->readyMasks.exception)) { - mask |= TCL_EXCEPTION; - } + for (filePtr = tsdPtr->firstFileHandlerPtr; (filePtr != NULL); + filePtr = filePtr->nextPtr) { + mask = 0; + if (FD_ISSET(filePtr->fd, &tsdPtr->readyMasks.readable)) { + mask |= TCL_READABLE; + } + if (FD_ISSET(filePtr->fd, &tsdPtr->readyMasks.writable)) { + mask |= TCL_WRITABLE; + } + if (FD_ISSET(filePtr->fd, &tsdPtr->readyMasks.exception)) { + mask |= TCL_EXCEPTION; + } - if (!mask) { - continue; - } + if (!mask) { + continue; + } - /* - * Don't bother to queue an event if the mask was previously - * non-zero since an event must still be on the queue. - */ + /* + * Don't bother to queue an event if the mask was previously + * non-zero since an event must still be on the queue. + */ - if (filePtr->readyMask == 0) { - FileHandlerEvent *fileEvPtr = - (FileHandlerEvent *) ckalloc(sizeof(FileHandlerEvent)); - fileEvPtr->header.proc = FileHandlerEventProc; - fileEvPtr->fd = filePtr->fd; - Tcl_QueueEvent((Tcl_Event *) fileEvPtr, TCL_QUEUE_TAIL); + if (filePtr->readyMask == 0) { + FileHandlerEvent *fileEvPtr = + ckalloc(sizeof(FileHandlerEvent)); + + fileEvPtr->header.proc = FileHandlerEventProc; + fileEvPtr->fd = filePtr->fd; + Tcl_QueueEvent((Tcl_Event *) fileEvPtr, TCL_QUEUE_TAIL); + } + filePtr->readyMask = mask; } - filePtr->readyMask = mask; - } #ifdef TCL_THREADS - Tcl_MutexUnlock(¬ifierMutex); + Tcl_MutexUnlock(¬ifierMutex); #endif /* TCL_THREADS */ - return 0; + return 0; + } } #ifdef TCL_THREADS |