diff options
Diffstat (limited to 'macosx/tclMacOSXNotify.c')
| -rw-r--r-- | macosx/tclMacOSXNotify.c | 64 |
1 files changed, 44 insertions, 20 deletions
diff --git a/macosx/tclMacOSXNotify.c b/macosx/tclMacOSXNotify.c index f9cd046..e591446 100644 --- a/macosx/tclMacOSXNotify.c +++ b/macosx/tclMacOSXNotify.c @@ -13,7 +13,7 @@ * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclMacOSXNotify.c,v 1.1.2.7 2006/07/20 06:21:42 das Exp $ + * RCS: @(#) $Id: tclMacOSXNotify.c,v 1.1.2.8 2006/08/21 01:08:10 das Exp $ */ #include "tclInt.h" @@ -180,7 +180,7 @@ static void SpinLockLockInit(void) { lockLock = OSSpinLockLock != NULL ? OSSpinLockLock : _spin_lock; lockUnlock = OSSpinLockUnlock != NULL ? OSSpinLockUnlock : _spin_unlock; if (lockLock == NULL || lockUnlock == NULL) { - Tcl_Panic("SpinLockLockInit: no spinlock API available."); + Tcl_Panic("SpinLockLockInit: no spinlock API available"); } } #define SpinLockLock(p) lockLock(p) @@ -238,6 +238,14 @@ static OSSpinLock notifierLock = 0; static pthread_t notifierThread; /* + * Custom run loop mode containing only the run loop source for the + * notifier thread. + */ + +static const CFStringRef tclEventsOnlyRunLoopMode = + CFSTR("com.tcltk.tclEventsOnlyRunLoopMode"); + +/* * Static routines defined in this file. */ @@ -285,7 +293,7 @@ Tcl_InitNotifier(void) * Initialize support for weakly imported spinlock API. */ if (pthread_once(&spinLockLockInitControl, SpinLockLockInit)) { - Tcl_Panic("Tcl_InitNotifier: pthread_once failed."); + Tcl_Panic("Tcl_InitNotifier: pthread_once failed"); } #endif @@ -302,9 +310,10 @@ Tcl_InitNotifier(void) runLoopSourceContext.info = tsdPtr; runLoopSource = CFRunLoopSourceCreate(NULL, 0, &runLoopSourceContext); if (!runLoopSource) { - Tcl_Panic("Tcl_InitNotifier: could not create CFRunLoopSource."); + Tcl_Panic("Tcl_InitNotifier: could not create CFRunLoopSource"); } CFRunLoopAddSource(runLoop, runLoopSource, kCFRunLoopCommonModes); + CFRunLoopAddSource(runLoop, runLoopSource, tclEventsOnlyRunLoopMode); tsdPtr->runLoopSource = runLoopSource; tsdPtr->runLoop = runLoop; } @@ -322,8 +331,8 @@ Tcl_InitNotifier(void) #endif !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; } @@ -336,18 +345,18 @@ Tcl_InitNotifier(void) */ if (pipe(fds) != 0) { - Tcl_Panic("Tcl_InitNotifier: could not create trigger pipe."); + Tcl_Panic("Tcl_InitNotifier: could not create trigger pipe"); } status = fcntl(fds[0], F_GETFL); status |= O_NONBLOCK; if (fcntl(fds[0], F_SETFL, status) < 0) { - Tcl_Panic("Tcl_InitNotifier: could not make receive pipe non blocking."); + Tcl_Panic("Tcl_InitNotifier: could not make receive pipe non blocking"); } status = fcntl(fds[1], F_GETFL); status |= O_NONBLOCK; if (fcntl(fds[1], F_SETFL, status) < 0) { - Tcl_Panic("Tcl_InitNotifier: could not make trigger pipe non blocking."); + Tcl_Panic("Tcl_InitNotifier: could not make trigger pipe non blocking"); } receivePipe = fds[0]; @@ -358,7 +367,7 @@ Tcl_InitNotifier(void) * interfering with fork() followed immediately by execve() * (cannot execve() when more than one thread is present). */ - + notifierThread = 0; } notifierCount++; @@ -403,7 +412,7 @@ Tcl_FinalizeNotifier(clientData) int result; if (triggerPipe < 0) { - Tcl_Panic("Tcl_FinalizeNotifier: notifier pipe not initialized."); + Tcl_Panic("Tcl_FinalizeNotifier: notifier pipe not initialized"); } /* @@ -423,7 +432,7 @@ Tcl_FinalizeNotifier(clientData) if (notifierThread) { result = pthread_join(notifierThread, NULL); if (result) { - Tcl_Panic("Tcl_FinalizeNotifier: unable to join notifier thread."); + Tcl_Panic("Tcl_FinalizeNotifier: unable to join notifier thread"); } notifierThread = 0; } @@ -824,7 +833,7 @@ Tcl_WaitForEvent(timePtr) (void * (*)(void *))NotifierThreadProc, NULL); pthread_attr_destroy(&attr); if (result || !notifierThread) { - Tcl_Panic("Tcl_WaitForEvent: unable to start notifier thread."); + Tcl_Panic("Tcl_WaitForEvent: unable to start notifier thread"); } } UNLOCK_NOTIFIER_INIT; @@ -877,14 +886,27 @@ Tcl_WaitForEvent(timePtr) if (!tsdPtr->eventReady) { CFTimeInterval waitTime; + CFStringRef runLoopMode; if (timePtr == NULL) { waitTime = 1.0e10; /* Wait forever, as per CFRunLoop.c */ } else { waitTime = timePtr->sec + 1.0e-6 * timePtr->usec; } + /* + * If the run loop is already running (e.g. if Tcl_WaitForEvent was + * called recursively), re-run it in a custom run loop mode containing + * only the source for the notifier thread, otherwise wakeups from other + * sources added to the common run loop modes might get lost. + */ + if ((runLoopMode = CFRunLoopCopyCurrentMode(tsdPtr->runLoop))) { + CFRelease(runLoopMode); + runLoopMode = tclEventsOnlyRunLoopMode; + } else { + runLoopMode = kCFRunLoopDefaultMode; + } UNLOCK_NOTIFIER; - CFRunLoopRunInMode(kCFRunLoopDefaultMode, waitTime, TRUE); + CFRunLoopRunInMode(runLoopMode, waitTime, TRUE); LOCK_NOTIFIER; } tsdPtr->eventReady = 0; @@ -1204,14 +1226,16 @@ AtForkChild(void) } if (notifierCount > 0) { notifierCount = 0; + /* - * Assume that the return value of Tcl_InitNotifier() in the child - * will be identical to the one stored as clientData in tclNotify.c's - * ThreadSpecificData by the parent's TclInitNotifier(), so discard - * the return value here. This assumption may require the fork() to - * be executed in the main thread of the parent, otherwise - * Tcl_AlertNotifier() may break in the child. + * Assume that the return value of Tcl_InitNotifier in the child will + * be identical to the one stored as clientData in tclNotify.c's + * ThreadSpecificData by the parent's TclInitNotifier, so discard the + * return value here. This assumption may require the fork() to be + * executed in the main thread of the parent, otherwise + * Tcl_AlertNotifier may break in the child. */ + Tcl_InitNotifier(); } } |