diff options
Diffstat (limited to 'unix/tclUnixNotfy.c')
| -rw-r--r-- | unix/tclUnixNotfy.c | 139 |
1 files changed, 91 insertions, 48 deletions
diff --git a/unix/tclUnixNotfy.c b/unix/tclUnixNotfy.c index d992d65..0be9ed4 100644 --- a/unix/tclUnixNotfy.c +++ b/unix/tclUnixNotfy.c @@ -2,10 +2,12 @@ * tclUnixNotfy.c -- * * This file contains subroutines shared by all notifier backend - * implementations on *nix platforms. + * implementations on *nix platforms. It is *included* by the epoll, + * kqueue and select notifier implementation files. * * Copyright © 1995-1997 Sun Microsystems, Inc. * Copyright © 2016 Lucio Andrés Illanes Albornoz <l.illanes@gmx.de> + * Copyright © 2021 Donal K. Fellows * * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. @@ -45,8 +47,10 @@ static void AtForkChild(void); * *---------------------------------------------------------------------- */ + static void -StartNotifierThread(const char *proc) +StartNotifierThread( + const char *proc) { if (!notifierThreadRunning) { pthread_mutex_lock(¬ifierInitMutex); @@ -57,6 +61,7 @@ StartNotifierThread(const char *proc) } pthread_mutex_lock(¬ifierMutex); + /* * Wait for the notifier pipe to be created. */ @@ -76,7 +81,7 @@ StartNotifierThread(const char *proc) /* *---------------------------------------------------------------------- * - * Tcl_AlertNotifier -- + * TclpAlertNotifier -- * * Wake up the specified notifier from any thread. This routine is called * by the platform independent notifier code whenever the Tcl_ThreadAlert @@ -99,50 +104,97 @@ StartNotifierThread(const char *proc) */ void -Tcl_AlertNotifier( +TclpAlertNotifier( ClientData clientData) { - if (tclNotifierHooks.alertNotifierProc) { - tclNotifierHooks.alertNotifierProc(clientData); - return; - } else { #ifdef NOTIFIER_SELECT #if TCL_THREADS - ThreadSpecificData *tsdPtr = (ThreadSpecificData *)clientData; + ThreadSpecificData *tsdPtr = (ThreadSpecificData *) clientData; - pthread_mutex_lock(¬ifierMutex); - tsdPtr->eventReady = 1; + pthread_mutex_lock(¬ifierMutex); + tsdPtr->eventReady = 1; # ifdef __CYGWIN__ - PostMessageW(tsdPtr->hwnd, 1024, 0, 0); + PostMessageW(tsdPtr->hwnd, 1024, 0, 0); # else - pthread_cond_broadcast(&tsdPtr->waitCV); + pthread_cond_broadcast(&tsdPtr->waitCV); # endif /* __CYGWIN__ */ - pthread_mutex_unlock(¬ifierMutex); + pthread_mutex_unlock(¬ifierMutex); #endif /* TCL_THREADS */ #else /* !NOTIFIER_SELECT */ - ThreadSpecificData *tsdPtr = (ThreadSpecificData *)clientData; + ThreadSpecificData *tsdPtr = (ThreadSpecificData *) clientData; #if defined(NOTIFIER_EPOLL) && defined(HAVE_EVENTFD) - uint64_t eventFdVal = 1; - if (write(tsdPtr->triggerEventFd, &eventFdVal, - sizeof(eventFdVal)) != sizeof(eventFdVal)) { - Tcl_Panic("Tcl_AlertNotifier: unable to write to %p->triggerEventFd", - (void *)tsdPtr); - } + uint64_t eventFdVal = 1; + + if (write(tsdPtr->triggerEventFd, &eventFdVal, + sizeof(eventFdVal)) != sizeof(eventFdVal)) { + Tcl_Panic("Tcl_AlertNotifier: unable to write to %p->triggerEventFd", + (void *) tsdPtr); + } #else - if (write(tsdPtr->triggerPipe[1], "", 1) != 1) { - Tcl_Panic("Tcl_AlertNotifier: unable to write to %p->triggerPipe", - (void *)tsdPtr); - } + if (write(tsdPtr->triggerPipe[1], "", 1) != 1) { + Tcl_Panic("Tcl_AlertNotifier: unable to write to %p->triggerPipe", + (void *) tsdPtr); + } #endif /* NOTIFIER_EPOLL && HAVE_EVENTFD */ #endif /* NOTIFIER_SELECT */ +} + +/* + *---------------------------------------------------------------------- + * + * LookUpFileHandler -- + * + * Look up the file handler structure (and optionally the previous one in + * the chain) associated with a file descriptor. + * + * Returns: + * A pointer to the file handler, or NULL if it can't be found. + * + * Side effects: + * If prevPtrPtr is non-NULL, it will be written to if the file handler + * is found. + * + *---------------------------------------------------------------------- + */ + +static inline FileHandler * +LookUpFileHandler( + ThreadSpecificData *tsdPtr, /* Where to look things up. */ + int fd, /* What we are looking for. */ + FileHandler **prevPtrPtr) /* If non-NULL, where to report the previous + * pointer. */ +{ + FileHandler *filePtr, *prevPtr; + + /* + * 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 NULL; + } + if (filePtr->fd == fd) { + break; + } + } + + /* + * Report what we've found to our caller. + */ + + if (prevPtrPtr) { + *prevPtrPtr = prevPtr; } + return filePtr; } /* *---------------------------------------------------------------------- * - * Tcl_SetTimer -- + * TclpSetTimer -- * * This function sets the current notifier timer value. This interface is * not implemented in this notifier because we are always running inside @@ -158,19 +210,14 @@ Tcl_AlertNotifier( */ void -Tcl_SetTimer( +TclpSetTimer( const Tcl_Time *timePtr) /* Timeout value, may be NULL. */ { - 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. - */ - } + /* + * 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. + */ } /* @@ -190,14 +237,11 @@ Tcl_SetTimer( */ void -Tcl_ServiceModeHook( +TclpServiceModeHook( int mode) /* Either TCL_SERVICE_ALL, or * TCL_SERVICE_NONE. */ { - if (tclNotifierHooks.serviceModeHookProc) { - tclNotifierHooks.serviceModeHookProc(mode); - return; - } else if (mode == TCL_SERVICE_ALL) { + if (mode == TCL_SERVICE_ALL) { #ifdef NOTIFIER_SELECT #if TCL_THREADS StartNotifierThread("Tcl_ServiceModeHook"); @@ -414,12 +458,9 @@ AtForkChild(void) Tcl_InitNotifier(); } #endif /* HAVE_PTHREAD_ATFORK */ - #endif /* TCL_THREADS */ - #endif /* NOTIFIER_SELECT */ -#ifndef HAVE_COREFOUNDATION /* Darwin/Mac OS X CoreFoundation notifier is - * in tclMacOSXNotify.c */ + /* *---------------------------------------------------------------------- * @@ -443,6 +484,9 @@ AtForkChild(void) *---------------------------------------------------------------------- */ +#ifndef HAVE_COREFOUNDATION /* Darwin/Mac OS X CoreFoundation notifier is + * in tclMacOSXNotify.c */ + int TclUnixWaitForFile( int fd, /* Handle for file on which to wait. */ @@ -563,9 +607,8 @@ TclUnixWaitForFile( || (abortTime.sec == now.sec && abortTime.usec > now.usec)); return result; } - #endif /* !HAVE_COREFOUNDATION */ - + /* * Local Variables: * mode: c |