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Diffstat (limited to 'mac/tclMacInterupt.c')
| -rw-r--r-- | mac/tclMacInterupt.c | 289 |
1 files changed, 0 insertions, 289 deletions
diff --git a/mac/tclMacInterupt.c b/mac/tclMacInterupt.c deleted file mode 100644 index 7f37d2f..0000000 --- a/mac/tclMacInterupt.c +++ /dev/null @@ -1,289 +0,0 @@ -/* - * tclMacInterupt.c -- - * - * This file contains routines that deal with the Macintosh's low level - * time manager. This code provides a better resolution timer than what - * can be provided by WaitNextEvent. - * - * Copyright (c) 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: tclMacInterupt.c,v 1.2 1998/09/14 18:40:05 stanton Exp $ - */ - -#include "tclInt.h" -#include "tclMacInt.h" -#include <LowMem.h> -#include <Processes.h> -#include <Timer.h> - -/* - * Data structure for timer tasks. - */ -typedef struct TMInfo { - TMTask tmTask; - ProcessSerialNumber psn; - Point lastPoint; - Point newPoint; - long currentA5; - long ourA5; - int installed; -} TMInfo; - -/* - * Globals used within this file. - */ - -static TimerUPP sleepTimerProc = NULL; -static int interuptsInited = false; -static ProcessSerialNumber applicationPSN; -#define MAX_TIMER_ARRAY_SIZE 16 -static TMInfo timerInfoArray[MAX_TIMER_ARRAY_SIZE]; -static int topTimerElement = 0; - -/* - * Prototypes for procedures that are referenced only in this file: - */ - -#if !GENERATINGCFM -static TMInfo * GetTMInfo(void) ONEWORDINLINE(0x2E89); /* MOVE.L A1,(SP) */ -#endif -static void SleepTimerProc _ANSI_ARGS_((void)); -static pascal void CleanUpExitProc _ANSI_ARGS_((void)); -static void InitInteruptSystem _ANSI_ARGS_((void)); - -/* - *---------------------------------------------------------------------- - * - * InitInteruptSystem -- - * - * Does various initialization for the functions used in this - * file. Sets up Universial Pricedure Pointers, installs a trap - * patch for ExitToShell, etc. - * - * Results: - * None. - * - * Side effects: - * Various initialization. - * - *---------------------------------------------------------------------- - */ - -void -InitInteruptSystem() -{ - int i; - - sleepTimerProc = NewTimerProc(SleepTimerProc); - GetCurrentProcess(&applicationPSN); - for (i = 0; i < MAX_TIMER_ARRAY_SIZE; i++) { - timerInfoArray[i].installed = false; - } - - /* - * Install the ExitToShell patch. We use this patch instead - * of the Tcl exit mechanism because we need to ensure that - * these routines are cleaned up even if we crash or are forced - * to quit. There are some circumstances when the Tcl exit - * handlers may not fire. - */ - - TclMacInstallExitToShellPatch(CleanUpExitProc); - interuptsInited = true; -} - -/* - *---------------------------------------------------------------------- - * - * TclMacStartTimer -- - * - * Install a Time Manager task to wake our process up in the - * future. The process should get a NULL event after ms - * milliseconds. - * - * Results: - * None. - * - * Side effects: - * Schedules our process to wake up. - * - *---------------------------------------------------------------------- - */ - -void * -TclMacStartTimer( - long ms) /* Milliseconds. */ -{ - TMInfo *timerInfoPtr; - - if (!interuptsInited) { - InitInteruptSystem(); - } - - /* - * Obtain a pointer for the timer. We only allocate up - * to MAX_TIMER_ARRAY_SIZE timers. If we are past that - * max we return NULL. - */ - if (topTimerElement < MAX_TIMER_ARRAY_SIZE) { - timerInfoPtr = &timerInfoArray[topTimerElement]; - topTimerElement++; - } else { - return NULL; - } - - /* - * Install timer to wake process in ms milliseconds. - */ - timerInfoPtr->tmTask.tmAddr = sleepTimerProc; - timerInfoPtr->tmTask.tmWakeUp = 0; - timerInfoPtr->tmTask.tmReserved = 0; - timerInfoPtr->psn = applicationPSN; - timerInfoPtr->installed = true; - - InsTime((QElemPtr) timerInfoPtr); - PrimeTime((QElemPtr) timerInfoPtr, (long) ms); - - return (void *) timerInfoPtr; -} - -/* - *---------------------------------------------------------------------- - * - * TclMacRemoveTimer -- - * - * Remove the timer event from the Time Manager. - * - * Results: - * None. - * - * Side effects: - * A scheduled timer would be removed. - * - *---------------------------------------------------------------------- - */ - -void -TclMacRemoveTimer( - void * timerToken) /* Token got from start timer. */ -{ - TMInfo *timerInfoPtr = (TMInfo *) timerToken; - - if (timerInfoPtr == NULL) { - return; - } - - RmvTime((QElemPtr) timerInfoPtr); - timerInfoPtr->installed = false; - topTimerElement--; -} - -/* - *---------------------------------------------------------------------- - * - * TclMacTimerExpired -- - * - * Check to see if the installed timer has expired. - * - * Results: - * True if timer has expired, false otherwise. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -int -TclMacTimerExpired( - void * timerToken) /* Our token again. */ -{ - TMInfo *timerInfoPtr = (TMInfo *) timerToken; - - if ((timerInfoPtr == NULL) || - !(timerInfoPtr->tmTask.qType & kTMTaskActive)) { - return true; - } else { - return false; - } -} - -/* - *---------------------------------------------------------------------- - * - * SleepTimerProc -- - * - * Time proc is called by the is a callback routine placed in the - * system by Tcl_Sleep. The routine is called at interupt time - * and threrfor can not move or allocate memory. This call will - * schedule our process to wake up the next time the process gets - * around to consider running it. - * - * Results: - * None. - * - * Side effects: - * Schedules our process to wake up. - * - *---------------------------------------------------------------------- - */ - -static void -SleepTimerProc() -{ - /* - * In CFM code we can access our code directly. In 68k code that - * isn't based on CFM we must do a glorious hack. The function - * GetTMInfo is an inline assembler call that moves the pointer - * at A1 to the top of the stack. The Time Manager keeps the TMTask - * info record there before calling this call back. In order for - * this to work the infoPtr argument must be the *last* item on the - * stack. If we "piggyback" our data to the TMTask info record we - * can get access to the information we need. While this is really - * ugly - it's the way Apple recomends it be done - go figure... - */ - -#if GENERATINGCFM - WakeUpProcess(&applicationPSN); -#else - TMInfo * infoPtr; - - infoPtr = GetTMInfo(); - WakeUpProcess(&infoPtr->psn); -#endif -} - -/* - *---------------------------------------------------------------------- - * - * CleanUpExitProc -- - * - * This procedure is invoked as an exit handler when ExitToShell - * is called. It removes the system level timer handler if it - * is installed. This must be called or the Mac OS will more than - * likely crash. - * - * Results: - * None. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static pascal void -CleanUpExitProc() -{ - int i; - - for (i = 0; i < MAX_TIMER_ARRAY_SIZE; i++) { - if (timerInfoArray[i].installed) { - RmvTime((QElemPtr) &timerInfoArray[i]); - timerInfoArray[i].installed = false; - } - } -} |