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Diffstat (limited to 'mac/tclMacNotify.c')
| -rw-r--r-- | mac/tclMacNotify.c | 581 |
1 files changed, 0 insertions, 581 deletions
diff --git a/mac/tclMacNotify.c b/mac/tclMacNotify.c deleted file mode 100644 index 81f4082..0000000 --- a/mac/tclMacNotify.c +++ /dev/null @@ -1,581 +0,0 @@ -/* - * tclMacNotify.c -- - * - * This file contains Macintosh-specific procedures for the notifier, - * which is the lowest-level part of the Tcl event loop. This file - * works together with ../generic/tclNotify.c. - * - * The Mac notifier only polls for system and OS events, so it is process - * wide, rather than thread specific. However, this means that the convert - * event proc will have to arbitrate which events go to which threads. - * - * Copyright (c) 1995-1996 Sun Microsystems, Inc. - * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. - * - * RCS: @(#) $Id: tclMacNotify.c,v 1.8.4.1 2003/03/21 03:24:08 dgp Exp $ - */ - -#include "tclInt.h" -#include "tclPort.h" -#include "tclMac.h" -#include "tclMacInt.h" -#include <signal.h> -#include <Events.h> -#include <LowMem.h> -#include <Processes.h> -#include <Timer.h> -#include <Threads.h> - - -/* - * This is necessary to work around a bug in Apple's Universal header files - * for the CFM68K libraries. - */ - -#ifdef __CFM68K__ -#undef GetEventQueue -extern pascal QHdrPtr GetEventQueue(void) - THREEWORDINLINE(0x2EBC, 0x0000, 0x014A); -#pragma import list GetEventQueue -#define GetEvQHdr() GetEventQueue() -#endif - -/* - * Need this for replacing Tcl_SetTimer and Tcl_WaitForEvent defined - * in THIS file with ones defined in the stub table. - */ - -extern TclStubs tclStubs; -extern Tcl_NotifierProcs tclOriginalNotifier; - -/* - * The follwing static indicates whether this module has been initialized. - */ - -static int initialized = 0; - -/* - * The following structure contains the state information for the - * notifier module. - */ - -static struct { - int timerActive; /* 1 if timer is running. */ - Tcl_Time timer; /* Time when next timer event is expected. */ - int flags; /* OR'ed set of flags defined below. */ - Point lastMousePosition; /* Last known mouse location. */ - RgnHandle utilityRgn; /* Region used as the mouse region for - * WaitNextEvent and the update region when - * checking for events. */ - Tcl_MacConvertEventPtr eventProcPtr; - /* This pointer holds the address of the - * function that will handle all incoming - * Macintosh events. */ -} notifier; - -/* - * The following defines are used in the flags field of the notifier struct. - */ - -#define NOTIFY_IDLE (1<<1) /* Tcl_ServiceIdle should be called. */ -#define NOTIFY_TIMER (1<<2) /* Tcl_ServiceTimer should be called. */ - -/* - * Prototypes for procedures that are referenced only in this file: - */ - -static int HandleMacEvents _ANSI_ARGS_((void)); -static void InitNotifier _ANSI_ARGS_((void)); -static void NotifierExitHandler _ANSI_ARGS_(( - ClientData clientData)); - -/* - *---------------------------------------------------------------------- - * - * Tcl_InitNotifier -- - * - * Initializes the platform specific notifier state. There is no thread - * specific platform notifier on the Mac, so this really doesn't do - * anything. However, we need to return the ThreadID, since the generic - * notifier hands this back to us in AlertThread. - * - * Results: - * Returns the threadID for this thread. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -ClientData -Tcl_InitNotifier() -{ - -#ifdef TCL_THREADS - ThreadID curThread; - if (TclMacHaveThreads()) { - GetCurrentThread(&curThread); - return (ClientData) curThread; - } else { - return NULL; - } -#else - return NULL; -#endif - -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_FinalizeNotifier -- - * - * This function is called to cleanup the notifier state before - * a thread is terminated. There is no platform thread specific - * notifier, so this does nothing. - * - * Results: - * None. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -void -Tcl_FinalizeNotifier(clientData) - ClientData clientData; /* Pointer to notifier data. */ -{ - /* Nothing to do on the Mac */ -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_AlertNotifier -- - * - * Wake up the specified notifier from any thread. This routine - * is called by the platform independent notifier code whenever - * the Tcl_ThreadAlert routine is called. This routine is - * guaranteed not to be called on a given notifier after - * Tcl_FinalizeNotifier is called for that notifier. - * - * Results: - * None. - * - * Side effects: - * Calls YieldToThread from this thread. - * - *---------------------------------------------------------------------- - */ - -void -Tcl_AlertNotifier(clientData) - ClientData clientData; /* Pointer to thread data. */ -{ - -#ifdef TCL_THREADS - if (TclMacHaveThreads()) { - YieldToThread((ThreadID) clientData); - } -#endif - -} - -/* - *---------------------------------------------------------------------- - * - * InitNotifier -- - * - * Initializes the notifier structure. Note - this function is never - * used. - * - * Results: - * None. - * - * Side effects: - * Creates a new exit handler. - * - *---------------------------------------------------------------------- - */ - -static void -InitNotifier(void) -{ - initialized = 1; - memset(¬ifier, 0, sizeof(notifier)); - Tcl_CreateExitHandler(NotifierExitHandler, NULL); -} - -/* - *---------------------------------------------------------------------- - * - * NotifierExitHandler -- - * - * This function is called to cleanup the notifier state before - * Tcl is unloaded. This function is never used, since InitNotifier - * isn't either. - * - * Results: - * None. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static void -NotifierExitHandler( - ClientData clientData) /* Not used. */ -{ - initialized = 0; -} - -/* - *---------------------------------------------------------------------- - * - * HandleMacEvents -- - * - * This function checks for events from the Macintosh event queue. - * - * Results: - * Returns 1 if event found, 0 otherwise. - * - * Side effects: - * Pulls events off of the Mac event queue and then calls - * convertEventProc. - * - *---------------------------------------------------------------------- - */ - -static int -HandleMacEvents(void) -{ - EventRecord theEvent; - int eventFound = 0, needsUpdate = 0; - Point currentMouse; - WindowRef windowRef; - Rect mouseRect; - - /* - * Check for mouse moved events. These events aren't placed on the - * system event queue unless we call WaitNextEvent. - */ - - GetGlobalMouseTcl(¤tMouse); - if ((notifier.eventProcPtr != NULL) && - !EqualPt(currentMouse, notifier.lastMousePosition)) { - notifier.lastMousePosition = currentMouse; - theEvent.what = nullEvent; - if ((*notifier.eventProcPtr)(&theEvent) == true) { - eventFound = 1; - } - } - - /* - * Check for update events. Since update events aren't generated - * until we call GetNextEvent, we may need to force a call to - * GetNextEvent, even if the queue is empty. - */ - - for (windowRef = FrontWindow(); windowRef != NULL; - windowRef = GetNextWindow(windowRef)) { - GetWindowUpdateRgn(windowRef, notifier.utilityRgn); - if (!EmptyRgn(notifier.utilityRgn)) { - needsUpdate = 1; - break; - } - } - - /* - * Process events from the OS event queue. - */ - - while (needsUpdate || (GetEvQHdr()->qHead != NULL)) { - GetGlobalMouseTcl(¤tMouse); - SetRect(&mouseRect, currentMouse.h, currentMouse.v, - currentMouse.h + 1, currentMouse.v + 1); - RectRgn(notifier.utilityRgn, &mouseRect); - - WaitNextEvent(everyEvent, &theEvent, 5, notifier.utilityRgn); - needsUpdate = 0; - if ((notifier.eventProcPtr != NULL) - && ((*notifier.eventProcPtr)(&theEvent) == true)) { - eventFound = 1; - } - } - - return eventFound; -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_SetTimer -- - * - * This procedure sets the current notifier timer value. The - * notifier will ensure that Tcl_ServiceAll() is called after - * the specified interval, even if no events have occurred. - * - * Results: - * None. - * - * Side effects: - * Replaces any previous timer. - * - *---------------------------------------------------------------------- - */ - -void -Tcl_SetTimer( - Tcl_Time *timePtr) /* New value for interval timer. */ -{ - /* - * Allow the notifier to be hooked. This may not make sense - * on the Mac, but mirrors the UNIX hook. - */ - - if (tclStubs.tcl_SetTimer != tclOriginalNotifier.setTimerProc) { - tclStubs.tcl_SetTimer(timePtr); - return; - } - - if (!timePtr) { - notifier.timerActive = 0; - } else { - /* - * Compute when the timer should fire. - */ - - Tcl_GetTime(¬ifier.timer); - notifier.timer.sec += timePtr->sec; - notifier.timer.usec += timePtr->usec; - if (notifier.timer.usec >= 1000000) { - notifier.timer.usec -= 1000000; - notifier.timer.sec += 1; - } - notifier.timerActive = 1; - } -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_ServiceModeHook -- - * - * This function is invoked whenever the service mode changes. - * - * Results: - * None. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -void -Tcl_ServiceModeHook(mode) - int mode; /* Either TCL_SERVICE_ALL, or - * TCL_SERVICE_NONE. */ -{ -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_WaitForEvent -- - * - * This function is called by Tcl_DoOneEvent to wait for new - * events on the message queue. If the block time is 0, then - * Tcl_WaitForEvent just polls the event queue without blocking. - * - * Results: - * Always returns 0. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -int -Tcl_WaitForEvent( - Tcl_Time *timePtr) /* Maximum block time. */ -{ - int found; - EventRecord macEvent; - long sleepTime = 5; - long ms; - Point currentMouse; - void * timerToken; - Rect mouseRect; - - /* - * Allow the notifier to be hooked. This may not make - * sense on the Mac, but mirrors the UNIX hook. - */ - - if (tclStubs.tcl_WaitForEvent != tclOriginalNotifier.waitForEventProc) { - return tclStubs.tcl_WaitForEvent(timePtr); - } - - /* - * Compute the next timeout value. - */ - - if (!timePtr) { - ms = INT_MAX; - } else { - ms = (timePtr->sec * 1000) + (timePtr->usec / 1000); - } - timerToken = TclMacStartTimer((long) ms); - - /* - * Poll the Mac event sources. This loop repeats until something - * happens: a timeout, a socket event, mouse motion, or some other - * window event. Note that we don't call WaitNextEvent if another - * event is found to avoid context switches. This effectively gives - * events coming in via WaitNextEvent a slightly lower priority. - */ - - found = 0; - if (notifier.utilityRgn == NULL) { - notifier.utilityRgn = NewRgn(); - } - - while (!found) { - /* - * Check for generated and queued events. - */ - - if (HandleMacEvents()) { - found = 1; - } - - /* - * Check for time out. - */ - - if (!found && TclMacTimerExpired(timerToken)) { - found = 1; - } - - /* - * Check for window events. We may receive a NULL event for - * various reasons. 1) the timer has expired, 2) a mouse moved - * event is occuring or 3) the os is giving us time for idle - * events. Note that we aren't sharing the processor very - * well here. We really ought to do a better job of calling - * WaitNextEvent for time slicing purposes. - */ - - if (!found) { - /* - * Set up mouse region so we will wake if the mouse is moved. - * We do this by defining the smallest possible region around - * the current mouse position. - */ - - GetGlobalMouseTcl(¤tMouse); - SetRect(&mouseRect, currentMouse.h, currentMouse.v, - currentMouse.h + 1, currentMouse.v + 1); - RectRgn(notifier.utilityRgn, &mouseRect); - - WaitNextEvent(everyEvent, &macEvent, sleepTime, - notifier.utilityRgn); - - if (notifier.eventProcPtr != NULL) { - if ((*notifier.eventProcPtr)(&macEvent) == true) { - found = 1; - } - } - } - } - TclMacRemoveTimer(timerToken); - - /* - * Yield time to nay other thread at this point. If we find that the - * apps thrash too switching between threads, we can put a timer here, - * and only yield when the timer fires. - */ - - if (TclMacHaveThreads()) { - YieldToAnyThread(); - } - - return 0; -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_Sleep -- - * - * Delay execution for the specified number of milliseconds. This - * is not a very good call to make. It will block the system - - * you will not even be able to switch applications. - * - * Results: - * None. - * - * Side effects: - * Time passes. - * - *---------------------------------------------------------------------- - */ - -void -Tcl_Sleep( - int ms) /* Number of milliseconds to sleep. */ -{ - EventRecord dummy; - void *timerToken; - - if (ms <= 0) { - return; - } - - timerToken = TclMacStartTimer((long) ms); - while (1) { - WaitNextEvent(0, &dummy, (ms / 16.66) + 1, NULL); - if (TclMacHaveThreads()) { - YieldToAnyThread(); - } - if (TclMacTimerExpired(timerToken)) { - break; - } - } - TclMacRemoveTimer(timerToken); -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_MacSetEventProc -- - * - * This function sets the event handling procedure for the - * application. This function will be passed all incoming Mac - * events. This function usually controls the console or some - * other entity like Tk. - * - * Results: - * None. - * - * Side effects: - * Changes the event handling function. - * - *---------------------------------------------------------------------- - */ - -void -Tcl_MacSetEventProc( - Tcl_MacConvertEventPtr procPtr) -{ - notifier.eventProcPtr = procPtr; -} |