/* * tkMacOSXInit.c -- * * This file contains Mac OS X -specific interpreter initialization * functions. * * Copyright © 1995-1997 Sun Microsystems, Inc. * Copyright © 2001-2009 Apple Inc. * Copyright © 2005-2009 Daniel A. Steffen * Copyright © 2017 Marc Culler * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. */ #include "tkMacOSXPrivate.h" #include "tkMacOSXConstants.h" #include #include #include #include static char tkLibPath[PATH_MAX + 1] = ""; /* * If the App is in an App package, then we want to add the Scripts directory * to the auto_path. */ static char scriptPath[PATH_MAX + 1] = ""; /* * Forward declarations... */ static int TkMacOSXGetAppPathObjCmd(TCL_UNUSED(void *), Tcl_Interp *ip, int objc, Tcl_Obj *const objv[]); static int TkMacOSVersionObjCmd(void *cd, Tcl_Interp *ip, int objc, Tcl_Obj *const objv[]); #pragma mark TKApplication(TKInit) @implementation TKApplication @synthesize poolLock = _poolLock; @synthesize macOSVersion = _macOSVersion; @synthesize isDrawing = _isDrawing; @synthesize isSigned = _isSigned; @synthesize tkLiveResizeEnded = _tkLiveResizeEnded; @synthesize tkPointerWindow = _tkPointerWindow; - (void) setTkPointerWindow: (TkWindow *)winPtr { if (winPtr) { Tcl_Preserve(winPtr); } if (_tkPointerWindow) { Tcl_Release(_tkPointerWindow); } _tkPointerWindow = winPtr; return; } @synthesize tkEventTarget = _tkEventTarget; - (void) setTkEventTarget: (TkWindow *)winPtr { if (winPtr) { Tcl_Preserve(winPtr); } if (_tkEventTarget) { Tcl_Release(_tkEventTarget); } _tkEventTarget = winPtr; return; } @synthesize tkDragTarget = _tkDragTarget; - (void) setTkDragTarget: (TkWindow *)winPtr { if (winPtr) { Tcl_Preserve(winPtr); } if (_tkDragTarget) { Tcl_Release(_tkDragTarget); } _tkDragTarget = winPtr; return; } @synthesize tkButtonState = _tkButtonState; @end /* * #define this to see a message on stderr whenever _resetAutoreleasePool is * called while the pool is locked. */ #undef DEBUG_LOCK @implementation TKApplication(TKInit) - (void) _resetAutoreleasePool { if ([self poolLock] == 0) { [_mainPool drain]; _mainPool = [NSAutoreleasePool new]; } else { #ifdef DEBUG_LOCK fprintf(stderr, "Pool is locked with count %d!!!!\n", [self poolLock]); #endif } } - (void) _lockAutoreleasePool { [self setPoolLock:[self poolLock] + 1]; } - (void) _unlockAutoreleasePool { [self setPoolLock:[self poolLock] - 1]; } #ifdef TK_MAC_DEBUG_NOTIFICATIONS - (void) _postedNotification: (NSNotification *) notification { TKLog(@"-[%@(%p) %s] %@", [self class], self, sel_getName(_cmd), notification); } #endif - (void) _setupApplicationNotifications { NSNotificationCenter *nc = [NSNotificationCenter defaultCenter]; #define observe(n, s) \ [nc addObserver:self selector:@selector(s) name:(n) object:nil] observe(NSApplicationDidBecomeActiveNotification, applicationActivate:); observe(NSApplicationWillResignActiveNotification, applicationDeactivate:); observe(NSApplicationDidUnhideNotification, applicationShowHide:); observe(NSApplicationDidHideNotification, applicationShowHide:); observe(NSApplicationDidChangeScreenParametersNotification, displayChanged:); observe(NSTextInputContextKeyboardSelectionDidChangeNotification, keyboardChanged:); #undef observe } /* * Fix for 10b38a7a7c. */ - (BOOL)applicationSupportsSecureRestorableState:(NSApplication *)app { return YES; } -(void)applicationWillFinishLaunching:(NSNotification *)aNotification { (void)aNotification; /* * Initialize notifications. */ #ifdef TK_MAC_DEBUG_NOTIFICATIONS [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_postedNotification:) name:nil object:nil]; #endif [self _setupWindowNotifications]; [self _setupApplicationNotifications]; if ([NSApp macOSVersion] >= 110000) { /* * Initialize Apple Event processing. Apple's docs (see * https://developer.apple.com/documentation/appkit/nsapplication) * recommend doing this here, although historically we have * done this in applicationWillFinishLaunching. In response to * bug 7bb246b072. */ TkMacOSXInitAppleEvents(_eventInterp); } } -(void)applicationDidFinishLaunching:(NSNotification *)notification { (void)notification; if ([NSApp macOSVersion] < 110000) { /* * Initialize Apple Event processing on macOS versions * older than Big Sur (11). */ TkMacOSXInitAppleEvents(_eventInterp); } /* * Initialize the graphics context. */ TkMacOSXUseAntialiasedText(_eventInterp, -1); TkMacOSXInitCGDrawing(_eventInterp, TRUE, 0); /* * Construct the menu bar. */ _defaultMainMenu = nil; [self _setupMenus]; /* * Run initialization routines that depend on the OS version. */ Ttk_MacOSXInit(); /* * It is not safe to force activation of the NSApp until this method is * called. Activating too early can cause the menu bar to be unresponsive. * The call to activateIgnoringOtherApps was moved here to avoid this. * However, with the release of macOS 10.15 (Catalina) that was no longer * sufficient. (See ticket bf93d098d7.) The call to setActivationPolicy * needed to be moved into this function as well. */ [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular]; [NSApp activateIgnoringOtherApps: YES]; /* * Add an event monitor so we continue to receive NSMouseMoved and * NSMouseDragged events when the mouse moves outside of the key * window. The handler simply returns the events it receives, so * they can be processed in the same way as for other events. */ [NSEvent addLocalMonitorForEventsMatchingMask:(NSMouseMovedMask | NSLeftMouseDraggedMask) handler:^NSEvent *(NSEvent *event) { return event; }]; /* * Process events to ensure that the root window is fully initialized. See * ticket 56a1823c73. */ [NSApp _lockAutoreleasePool]; while (Tcl_DoOneEvent(TCL_WINDOW_EVENTS|TCL_DONT_WAIT)) {} [NSApp _unlockAutoreleasePool]; } - (void) _setup: (Tcl_Interp *) interp { /* * Remember our interpreter. */ _eventInterp = interp; /* * Install the global autoreleasePool. */ _mainPool = [NSAutoreleasePool new]; [NSApp setPoolLock:0]; /* * Record the OS version we are running on. */ int minorVersion, majorVersion; #if MAC_OS_X_VERSION_MAX_ALLOWED < 101000 Gestalt(gestaltSystemVersionMinor, (SInt32*)&minorVersion); majorVersion = 10; #else NSOperatingSystemVersion systemVersion; systemVersion = [[NSProcessInfo processInfo] operatingSystemVersion]; majorVersion = (int)systemVersion.majorVersion; minorVersion = (int)systemVersion.minorVersion; #endif if (majorVersion == 10 && minorVersion == 16) { /* * If a program compiled with a macOS 10.XX SDK is run on macOS 11.0 or * later then it will report majorVersion 10 and minorVersion 16, no * matter what the actual OS version of the host may be. And of course * Apple never released macOS 10.16. To work around this we guess the * OS version from the kernel release number, as reported by uname. */ struct utsname name; char *endptr; if (uname(&name) == 0) { majorVersion = (int)strtol(name.release, &endptr, 10) - 9; minorVersion = 0; } } [NSApp setMacOSVersion: 10000*majorVersion + 100*minorVersion]; /* * We are not drawing right now. */ [NSApp setIsDrawing:NO]; /* * Be our own delegate. */ [self setDelegate:self]; /* * If no icon has been set from an Info.plist file, use the Wish icon from * the Tk framework. */ NSString *iconFile = [[NSBundle mainBundle] objectForInfoDictionaryKey: @"CFBundleIconFile"]; if (!iconFile) { NSString *path = [NSApp tkFrameworkImagePath:@"Tk.icns"]; if (path) { NSImage *image = [[NSImage alloc] initWithContentsOfFile:path]; if (image) { [image setName:@"NSApplicationIcon"]; [NSApp setApplicationIconImage:image]; [image release]; } } } } - (NSString *) tkFrameworkImagePath: (NSString *) image { NSString *path = nil; NSAutoreleasePool *pool = [NSAutoreleasePool new]; if (tkLibPath[0] != '\0') { path = [[NSBundle bundleWithPath:[[NSString stringWithUTF8String: tkLibPath] stringByAppendingString:@"/../.."]] pathForImageResource:image]; } if (!path) { const char *tk_library = Tcl_GetVar2(_eventInterp, "tk_library", NULL, TCL_GLOBAL_ONLY); if (tk_library) { NSFileManager *fm = [NSFileManager defaultManager]; path = [[NSString stringWithUTF8String:tk_library] stringByAppendingFormat:@"/%@", image]; if (![fm isReadableFileAtPath:path]) { path = [[NSString stringWithUTF8String:tk_library] stringByAppendingFormat:@"/../macosx/%@", image]; if (![fm isReadableFileAtPath:path]) { path = nil; } } } } #ifdef TK_MAC_DEBUG if (!path && getenv("TK_SRCROOT")) { path = [[NSString stringWithUTF8String:getenv("TK_SRCROOT")] stringByAppendingFormat:@"/macosx/%@", image]; if (![[NSFileManager defaultManager] isReadableFileAtPath:path]) { path = nil; } } #endif [path retain]; [pool drain]; return path; } @end #pragma mark - /* *---------------------------------------------------------------------- * * TkpInit -- * * Performs Mac-specific interpreter initialization related to the * tk_library variable. * * Results: * Returns a standard Tcl result. Leaves an error message or result in * the interp's result. * * Side effects: * Sets "tk_library" Tcl variable, runs "tk.tcl" script. * *---------------------------------------------------------------------- */ /* * Helper function which closes the shared NSFontPanel and NSColorPanel. */ static void closePanels( void) { if ([NSFontPanel sharedFontPanelExists]) { [[NSFontPanel sharedFontPanel] orderOut:nil]; } if ([NSColorPanel sharedColorPanelExists]) { [[NSColorPanel sharedColorPanel] orderOut:nil]; } } /* * This custom exit procedure is called by Tcl_Exit in place of the exit * function from the C runtime. It calls the terminate method of the * NSApplication class (superTerminate for a TKApplication). The purpose of * doing this is to ensure that the NSFontPanel and the NSColorPanel are closed * before the process exits, and that the application state is recorded * correctly for all termination scenarios. * * TkpWantsExitProc tells Tcl_AppInit whether to install our custom exit proc, * which terminates the process by calling [NSApplication terminate]. This * does not work correctly if the process is part of an exec pipeline, so it is * only done if the process was launched by the launcher or if both stdin and * stdout are ttys. To disable using the custom exit proc altogether, undefine * USE_CUSTOM_EXIT_PROC. */ #if defined(USE_CUSTOM_EXIT_PROC) static Bool doCleanupFromExit = NO; int TkpWantsExitProc(void) { return doCleanupFromExit == YES; } TCL_NORETURN void TkpExitProc( void *clientdata) { Bool doCleanup = doCleanupFromExit; if (doCleanupFromExit) { doCleanupFromExit = NO; /* prevent possible recursive call. */ closePanels(); } /* * Tcl_Exit does not call Tcl_Finalize if there is an exit proc installed. */ Tcl_Finalize(); if (doCleanup == YES) { [(TKApplication *)NSApp superTerminate:nil]; /* Should not return. */ } exit((int)PTR2INT(clientdata)); /* Convince the compiler that we don't return. */ } #endif /* * This signal handler is installed for the SIGINT, SIGHUP and SIGTERM signals * so that normal finalization occurs when a Tk app is killed by one of these * signals (e.g when ^C is pressed while running Wish in the shell). It calls * Tcl_Exit instead of the C runtime exit function called by the default handler. * This is consistent with the Tcl_Exit manual page, which says that Tcl_Exit * should always be called instead of exit. When Tk is killed by a signal we * return exit status 1. */ static void TkMacOSXSignalHandler(TCL_UNUSED(int)) { Tcl_Exit(1); } int TkpInit( Tcl_Interp *interp) { static int initialized = 0; /* * TkpInit can be called multiple times with different interpreters. But * The application initialization should only be done once. */ if (!initialized) { struct stat st; Bool shouldOpenConsole = NO; Bool stdinIsNullish = (!isatty(0) && (fstat(0, &st) || (S_ISCHR(st.st_mode) && st.st_blocks == 0))); /* * Initialize/check OS version variable for runtime checks. */ #if MAC_OS_X_VERSION_MIN_REQUIRED < 1060 # error Mac OS X 10.6 required #endif initialized = 1; #ifdef TK_FRAMEWORK /* * When Tk is in a framework, force tcl_findLibrary to look in the * framework scripts directory. * FIXME: Should we come up with a more generic way of doing this? */ if (Tcl_MacOSXOpenVersionedBundleResources(interp, "com.tcltk.tklibrary", TK_FRAMEWORK_VERSION, 0, PATH_MAX, tkLibPath) != TCL_OK) { # if 0 /* This is not really an error. Wish still runs fine. */ TkMacOSXDbgMsg("Tcl_MacOSXOpenVersionedBundleResources failed"); # endif } #endif /* * Instantiate our NSApplication object. This needs to be done before * we check whether to open a console window. */ NSAutoreleasePool *pool = [NSAutoreleasePool new]; [[NSUserDefaults standardUserDefaults] registerDefaults: [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithBool:YES], @"_NSCanWrapButtonTitles", [NSNumber numberWithInt:-1], @"NSStringDrawingTypesetterBehavior", nil]]; [TKApplication sharedApplication]; [pool drain]; /* * WARNING: The finishLaunching method runs asynchronously. This * creates a race between the initialization of the NSApplication and * the initialization of Tk. If Tk wins the race bad things happen * with the root window (see below). If the NSApplication wins then an * AppleEvent created during launch, e.g. by dropping a file icon on * the application icon, will be delivered before the procedure meant * to to handle the AppleEvent has been defined. This is handled in * tkMacOSXHLEvents.c by scheduling a timer event to handle the * AppleEvent later, after the required procedure has been defined. */ [NSApp _setup:interp]; [NSApp finishLaunching]; /* * Create a Tk event source based on the Appkit event queue. */ Tk_MacOSXSetupTkNotifier(); /* * If Tk initialization wins the race, the root window is mapped before * the NSApplication is initialized. This can cause bad things to * happen. The root window can open off screen with no way to make it * appear on screen until the app icon is clicked. This will happen if * a Tk application opens a modal window in its startup script (see * ticket 56a1823c73). In other cases, an empty root window can open * on screen and remain visible for a noticeable amount of time while * the Tk initialization finishes (see ticket d1989fb7cf). The call * below forces Tk to block until the Appkit event queue has been * created. This seems to be sufficient to ensure that the * NSApplication initialization wins the race, avoiding these bad * window behaviors. */ Tcl_DoOneEvent(TCL_WINDOW_EVENTS | TCL_DONT_WAIT); /* * Decide whether to open a console window. If the TK_CONSOLE * environment variable is not defined we only show the console if * stdin is not a tty and there is no startup script. */ if (getenv("TK_CONSOLE")) { shouldOpenConsole = YES; } else if (stdinIsNullish && Tcl_GetStartupScript(NULL) == NULL) { const char *intvar = Tcl_GetVar2(interp, "tcl_interactive", NULL, TCL_GLOBAL_ONLY); if (intvar == NULL) { Tcl_SetVar2(interp, "tcl_interactive", NULL, "1", TCL_GLOBAL_ONLY); } #if defined(USE_CUSTOM_EXIT_PROC) doCleanupFromExit = YES; #endif shouldOpenConsole = YES; } if (shouldOpenConsole) { Tk_InitConsoleChannels(interp); Tcl_RegisterChannel(interp, Tcl_GetStdChannel(TCL_STDIN)); Tcl_RegisterChannel(interp, Tcl_GetStdChannel(TCL_STDOUT)); Tcl_RegisterChannel(interp, Tcl_GetStdChannel(TCL_STDERR)); if (Tk_CreateConsoleWindow(interp) == TCL_ERROR) { return TCL_ERROR; } } else if (stdinIsNullish) { /* * When launched as a macOS application with no console, * redirect stderr and stdout to /dev/null. This avoids waiting * forever for those files to become writable if the underlying * Tcl program tries to write to them with a puts command. */ FILE *null = fopen("/dev/null", "w"); dup2(fileno(null), STDOUT_FILENO); dup2(fileno(null), STDERR_FILENO); #if defined(USE_CUSTOM_EXIT_PROC) doCleanupFromExit = YES; #endif } /* * FIXME: Close stdin & stdout for remote debugging if XCNOSTDIN is * set. Otherwise we will fight with gdb for stdin & stdout */ if (getenv("XCNOSTDIN") != NULL) { close(0); close(1); } /* * Now we can run initialization routines which require that both the * NSApplication and the Tcl interpreter have been created and * initialized. */ TkMacOSXServices_Init(interp); TkMacOSXNSImage_Init(interp); /* * The root window has been created and mapped, but XMapWindow deferred its * call to makeKeyAndOrderFront because the first call to XMapWindow * occurs too early in the initialization process for that. Process idle * tasks now, so the root window is configured, then order it front. */ while(Tcl_DoOneEvent(TCL_IDLE_EVENTS)) {}; for (NSWindow *window in [NSApp windows]) { TkWindow *winPtr = TkMacOSXGetTkWindow(window); if (winPtr && Tk_IsMapped(winPtr)) { [window makeKeyAndOrderFront:NSApp]; break; } } # if defined(USE_CUSTOM_EXIT_PROC) if ((isatty(0) && isatty(1))) { doCleanupFromExit = YES; } # endif /* * Install a signal handler for SIGINT, SIGHUP and SIGTERM which uses * Tcl_Exit instead of exit so that normal cleanup takes place if a TK * application is killed with one of these signals. */ signal(SIGINT, TkMacOSXSignalHandler); signal(SIGHUP, TkMacOSXSignalHandler); signal(SIGTERM, TkMacOSXSignalHandler); } /* * Initialization steps that are needed for all interpreters. */ if (tkLibPath[0] != '\0') { Tcl_SetVar2(interp, "tk_library", NULL, tkLibPath, TCL_GLOBAL_ONLY); } if (scriptPath[0] != '\0') { Tcl_SetVar2(interp, "auto_path", NULL, scriptPath, TCL_GLOBAL_ONLY|TCL_LIST_ELEMENT|TCL_APPEND_VALUE); } Tcl_CreateObjCommand(interp, "nsimage", TkMacOSXNSImageObjCmd, NULL, NULL); Tcl_CreateObjCommand(interp, "::tk::mac::standardAboutPanel", TkMacOSXStandardAboutPanelObjCmd, NULL, NULL); Tcl_CreateObjCommand(interp, "::tk::mac::iconBitmap", TkMacOSXIconBitmapObjCmd, NULL, NULL); Tcl_CreateObjCommand(interp, "::tk::mac::GetAppPath", TkMacOSXGetAppPathObjCmd, NULL, NULL); Tcl_CreateObjCommand(interp, "::tk::mac::macOSVersion", TkMacOSVersionObjCmd, NULL, NULL); MacSystrayInit(interp); MacPrint_Init(interp); return TCL_OK; } /* *---------------------------------------------------------------------- * * TkMacOSXGetAppPathObjCmd -- * * Returns the path of the Wish application bundle. * * Results: * Returns the application path. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int TkMacOSXGetAppPathObjCmd( TCL_UNUSED(void *), Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) { if (objc != 1) { Tcl_WrongNumArgs(interp, 1, objv, NULL); return TCL_ERROR; } /* * Get the application path URL and convert it to a string path reference. */ CFURLRef mainBundleURL = CFBundleCopyBundleURL(CFBundleGetMainBundle()); CFStringRef appPath = CFURLCopyFileSystemPath(mainBundleURL, kCFURLPOSIXPathStyle); /* * Convert (and copy) the string reference into a Tcl result. */ Tcl_SetObjResult(interp, Tcl_NewStringObj( CFStringGetCStringPtr(appPath, CFStringGetSystemEncoding()), TCL_INDEX_NONE)); CFRelease(mainBundleURL); CFRelease(appPath); return TCL_OK; } /* *---------------------------------------------------------------------- * * TkpGetAppName -- * * Retrieves the name of the current application from a platform specific * location. For Unix, the application name is the tail of the path * contained in the tcl variable argv0. * * Results: * Returns the application name in the given Tcl_DString. * * Side effects: * None. * *---------------------------------------------------------------------- */ void TkpGetAppName( Tcl_Interp *interp, Tcl_DString *namePtr) /* A previously initialized Tcl_DString. */ { const char *p, *name; name = Tcl_GetVar2(interp, "argv0", NULL, TCL_GLOBAL_ONLY); if ((name == NULL) || (*name == 0)) { name = "tk"; } else { p = strrchr(name, '/'); if (p != NULL) { name = p+1; } } Tcl_DStringAppend(namePtr, name, TCL_INDEX_NONE); } /* *---------------------------------------------------------------------- * * TkMacOSVersionObjCmd -- * * Tcl command which returns an integer encoding the major and minor * version numbers of the currently running operating system in the * form 10000*majorVersion + 100*minorVersion. * * Results: * Returns the OS version. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int TkMacOSVersionObjCmd( TCL_UNUSED(void *), Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) { static char version[16] = ""; if (objc > 1) { Tcl_WrongNumArgs(interp, 1, objv, NULL); return TCL_ERROR; } if (version[0] == '\0') { snprintf(version, 16, "%d", [NSApp macOSVersion]); } Tcl_SetResult(interp, version, NULL); return TCL_OK; } /* *---------------------------------------------------------------------- * * TkpDisplayWarning -- * * This routines is called from Tk_Main to display warning messages that * occur during startup. * * Results: * None. * * Side effects: * Generates messages on stdout. * *---------------------------------------------------------------------- */ void TkpDisplayWarning( const char *msg, /* Message to be displayed. */ const char *title) /* Title of warning. */ { Tcl_Channel errChannel = Tcl_GetStdChannel(TCL_STDERR); if (errChannel) { Tcl_WriteChars(errChannel, title, TCL_INDEX_NONE); Tcl_WriteChars(errChannel, ": ", 2); Tcl_WriteChars(errChannel, msg, TCL_INDEX_NONE); Tcl_WriteChars(errChannel, "\n", 1); } } /* *---------------------------------------------------------------------- * * TkMacOSXDefaultStartupScript -- * * On MacOS X, we look for a file in the Resources/Scripts directory * called AppMain.tcl and if found, we set argv[1] to that, so that the * rest of the code will find it, and add the Scripts folder to the * auto_path. If we don't find the startup script, we just bag it, * assuming the user is starting up some other way. * * Results: * None. * * Side effects: * Tcl_SetStartupScript() called when AppMain.tcl found. * *---------------------------------------------------------------------- */ MODULE_SCOPE void TkMacOSXDefaultStartupScript(void) { NSAutoreleasePool *pool = [NSAutoreleasePool new]; CFBundleRef bundleRef = CFBundleGetMainBundle(); if (bundleRef != NULL) { CFURLRef appMainURL = CFBundleCopyResourceURL(bundleRef, CFSTR("AppMain"), CFSTR("tcl"), CFSTR("Scripts")); if (appMainURL != NULL) { CFURLRef scriptFldrURL; char startupScript[PATH_MAX + 1]; if (CFURLGetFileSystemRepresentation(appMainURL, true, (unsigned char *) startupScript, PATH_MAX)) { Tcl_SetStartupScript(Tcl_NewStringObj(startupScript, TCL_INDEX_NONE), NULL); scriptFldrURL = CFURLCreateCopyDeletingLastPathComponent(NULL, appMainURL); if (scriptFldrURL != NULL) { CFURLGetFileSystemRepresentation(scriptFldrURL, true, (unsigned char *) scriptPath, PATH_MAX); CFRelease(scriptFldrURL); } } CFRelease(appMainURL); } } [pool drain]; } /* *---------------------------------------------------------------------- * * TkMacOSXGetNamedSymbol -- * * Dynamically acquire address of a named symbol from a loaded dynamic * library, so that we can use API that may not be available on all OS * versions. * * Results: * Address of given symbol or NULL if unavailable. * * Side effects: * None. * *---------------------------------------------------------------------- */ MODULE_SCOPE void* TkMacOSXGetNamedSymbol( const char* module, const char* symbol) { void *addr = dlsym(RTLD_NEXT, symbol); (void)module; if (!addr) { (void) dlerror(); /* Clear dlfcn error state */ } return addr; } /* * Local Variables: * mode: objc * c-basic-offset: 4 * fill-column: 79 * coding: utf-8 * End: */