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dashley |
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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tcltimer.c,v 1.1.1.1 2001/06/13 04:46:38 dtashley Exp $ */
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/*
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* tclTimer.c --
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*
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* This file provides timer event management facilities for Tcl,
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* including the "after" command.
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*
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* Copyright (c) 1997 by Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tcltimer.c,v 1.1.1.1 2001/06/13 04:46:38 dtashley Exp $
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*/
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#include "tclInt.h"
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#include "tclPort.h"
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/*
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* For each timer callback that's pending there is one record of the following
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* type. The normal handlers (created by Tcl_CreateTimerHandler) are chained
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* together in a list sorted by time (earliest event first).
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*/
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typedef struct TimerHandler {
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Tcl_Time time; /* When timer is to fire. */
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Tcl_TimerProc *proc; /* Procedure to call. */
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ClientData clientData; /* Argument to pass to proc. */
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Tcl_TimerToken token; /* Identifies handler so it can be
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* deleted. */
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struct TimerHandler *nextPtr; /* Next event in queue, or NULL for
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* end of queue. */
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} TimerHandler;
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/*
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* The data structure below is used by the "after" command to remember
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* the command to be executed later. All of the pending "after" commands
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* for an interpreter are linked together in a list.
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*/
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typedef struct AfterInfo {
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struct AfterAssocData *assocPtr;
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/* Pointer to the "tclAfter" assocData for
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* the interp in which command will be
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* executed. */
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Tcl_Obj *commandPtr; /* Command to execute. */
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int id; /* Integer identifier for command; used to
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* cancel it. */
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Tcl_TimerToken token; /* Used to cancel the "after" command. NULL
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* means that the command is run as an
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* idle handler rather than as a timer
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* handler. NULL means this is an "after
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* idle" handler rather than a
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* timer handler. */
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struct AfterInfo *nextPtr; /* Next in list of all "after" commands for
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* this interpreter. */
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} AfterInfo;
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/*
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* One of the following structures is associated with each interpreter
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* for which an "after" command has ever been invoked. A pointer to
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* this structure is stored in the AssocData for the "tclAfter" key.
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*/
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typedef struct AfterAssocData {
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Tcl_Interp *interp; /* The interpreter for which this data is
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* registered. */
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AfterInfo *firstAfterPtr; /* First in list of all "after" commands
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* still pending for this interpreter, or
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* NULL if none. */
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} AfterAssocData;
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/*
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* There is one of the following structures for each of the
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* handlers declared in a call to Tcl_DoWhenIdle. All of the
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* currently-active handlers are linked together into a list.
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*/
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typedef struct IdleHandler {
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Tcl_IdleProc (*proc); /* Procedure to call. */
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ClientData clientData; /* Value to pass to proc. */
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int generation; /* Used to distinguish older handlers from
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* recently-created ones. */
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struct IdleHandler *nextPtr;/* Next in list of active handlers. */
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} IdleHandler;
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/*
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* The timer and idle queues are per-thread because they are associated
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* with the notifier, which is also per-thread.
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*
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* All static variables used in this file are collected into a single
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* instance of the following structure. For multi-threaded implementations,
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* there is one instance of this structure for each thread.
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*
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* Notice that different structures with the same name appear in other
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* files. The structure defined below is used in this file only.
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*/
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typedef struct ThreadSpecificData {
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TimerHandler *firstTimerHandlerPtr; /* First event in queue. */
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int lastTimerId; /* Timer identifier of most recently
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* created timer. */
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int timerPending; /* 1 if a timer event is in the queue. */
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IdleHandler *idleList; /* First in list of all idle handlers. */
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IdleHandler *lastIdlePtr; /* Last in list (or NULL for empty list). */
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int idleGeneration; /* Used to fill in the "generation" fields
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* of IdleHandler structures. Increments
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* each time Tcl_DoOneEvent starts calling
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* idle handlers, so that all old handlers
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* can be called without calling any of the
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* new ones created by old ones. */
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int afterId; /* For unique identifiers of after events. */
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} ThreadSpecificData;
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static Tcl_ThreadDataKey dataKey;
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/*
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* Prototypes for procedures referenced only in this file:
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*/
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static void AfterCleanupProc _ANSI_ARGS_((ClientData clientData,
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Tcl_Interp *interp));
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static void AfterProc _ANSI_ARGS_((ClientData clientData));
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static void FreeAfterPtr _ANSI_ARGS_((AfterInfo *afterPtr));
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static AfterInfo * GetAfterEvent _ANSI_ARGS_((AfterAssocData *assocPtr,
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Tcl_Obj *commandPtr));
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static ThreadSpecificData *InitTimer _ANSI_ARGS_((void));
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static void TimerExitProc _ANSI_ARGS_((ClientData clientData));
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static int TimerHandlerEventProc _ANSI_ARGS_((Tcl_Event *evPtr,
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int flags));
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static void TimerCheckProc _ANSI_ARGS_((ClientData clientData,
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int flags));
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static void TimerSetupProc _ANSI_ARGS_((ClientData clientData,
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int flags));
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/*
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*----------------------------------------------------------------------
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*
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* InitTimer --
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*
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* This function initializes the timer module.
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*
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* Results:
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* A pointer to the thread specific data.
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*
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* Side effects:
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* Registers the idle and timer event sources.
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*
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*----------------------------------------------------------------------
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*/
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static ThreadSpecificData *
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InitTimer()
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{
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ThreadSpecificData *tsdPtr =
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(ThreadSpecificData *) TclThreadDataKeyGet(&dataKey);
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if (tsdPtr == NULL) {
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tsdPtr = TCL_TSD_INIT(&dataKey);
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Tcl_CreateEventSource(TimerSetupProc, TimerCheckProc, NULL);
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Tcl_CreateThreadExitHandler(TimerExitProc, NULL);
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}
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return tsdPtr;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TimerExitProc --
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*
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* This function is call at exit or unload time to remove the
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* timer and idle event sources.
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*
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* Results:
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* None.
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*
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* Side effects:
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* Removes the timer and idle event sources.
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*
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*----------------------------------------------------------------------
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*/
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static void
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TimerExitProc(clientData)
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ClientData clientData; /* Not used. */
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{
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Tcl_DeleteEventSource(TimerSetupProc, TimerCheckProc, NULL);
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}
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/*
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*--------------------------------------------------------------
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*
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* Tcl_CreateTimerHandler --
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*
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* Arrange for a given procedure to be invoked at a particular
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* time in the future.
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*
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* Results:
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* The return value is a token for the timer event, which
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* may be used to delete the event before it fires.
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*
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* Side effects:
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* When milliseconds have elapsed, proc will be invoked
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* exactly once.
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*
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*--------------------------------------------------------------
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*/
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Tcl_TimerToken
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Tcl_CreateTimerHandler(milliseconds, proc, clientData)
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int milliseconds; /* How many milliseconds to wait
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* before invoking proc. */
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Tcl_TimerProc *proc; /* Procedure to invoke. */
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ClientData clientData; /* Arbitrary data to pass to proc. */
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{
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register TimerHandler *timerHandlerPtr, *tPtr2, *prevPtr;
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Tcl_Time time;
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ThreadSpecificData *tsdPtr;
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tsdPtr = InitTimer();
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timerHandlerPtr = (TimerHandler *) ckalloc(sizeof(TimerHandler));
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/*
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* Compute when the event should fire.
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*/
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TclpGetTime(&time);
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timerHandlerPtr->time.sec = time.sec + milliseconds/1000;
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timerHandlerPtr->time.usec = time.usec + (milliseconds%1000)*1000;
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if (timerHandlerPtr->time.usec >= 1000000) {
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timerHandlerPtr->time.usec -= 1000000;
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timerHandlerPtr->time.sec += 1;
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}
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/*
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* Fill in other fields for the event.
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*/
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timerHandlerPtr->proc = proc;
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timerHandlerPtr->clientData = clientData;
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tsdPtr->lastTimerId++;
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timerHandlerPtr->token = (Tcl_TimerToken) tsdPtr->lastTimerId;
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/*
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* Add the event to the queue in the correct position
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* (ordered by event firing time).
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*/
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for (tPtr2 = tsdPtr->firstTimerHandlerPtr, prevPtr = NULL; tPtr2 != NULL;
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prevPtr = tPtr2, tPtr2 = tPtr2->nextPtr) {
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if ((tPtr2->time.sec > timerHandlerPtr->time.sec)
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|| ((tPtr2->time.sec == timerHandlerPtr->time.sec)
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&& (tPtr2->time.usec > timerHandlerPtr->time.usec))) {
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break;
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257 |
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}
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}
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timerHandlerPtr->nextPtr = tPtr2;
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if (prevPtr == NULL) {
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tsdPtr->firstTimerHandlerPtr = timerHandlerPtr;
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} else {
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prevPtr->nextPtr = timerHandlerPtr;
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}
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265 |
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TimerSetupProc(NULL, TCL_ALL_EVENTS);
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267 |
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return timerHandlerPtr->token;
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}
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/*
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272 |
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*--------------------------------------------------------------
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273 |
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*
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274 |
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* Tcl_DeleteTimerHandler --
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275 |
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*
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276 |
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* Delete a previously-registered timer handler.
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*
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278 |
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* Results:
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279 |
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* None.
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280 |
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*
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281 |
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* Side effects:
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282 |
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* Destroy the timer callback identified by TimerToken,
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283 |
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* so that its associated procedure will not be called.
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284 |
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* If the callback has already fired, or if the given
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285 |
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* token doesn't exist, then nothing happens.
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286 |
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*
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287 |
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*--------------------------------------------------------------
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288 |
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*/
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289 |
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290 |
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void
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291 |
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Tcl_DeleteTimerHandler(token)
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292 |
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Tcl_TimerToken token; /* Result previously returned by
|
293 |
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* Tcl_DeleteTimerHandler. */
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294 |
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{
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295 |
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register TimerHandler *timerHandlerPtr, *prevPtr;
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296 |
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ThreadSpecificData *tsdPtr;
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297 |
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298 |
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tsdPtr = InitTimer();
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299 |
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for (timerHandlerPtr = tsdPtr->firstTimerHandlerPtr, prevPtr = NULL;
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300 |
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timerHandlerPtr != NULL; prevPtr = timerHandlerPtr,
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301 |
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timerHandlerPtr = timerHandlerPtr->nextPtr) {
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302 |
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if (timerHandlerPtr->token != token) {
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303 |
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continue;
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304 |
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}
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305 |
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if (prevPtr == NULL) {
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306 |
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tsdPtr->firstTimerHandlerPtr = timerHandlerPtr->nextPtr;
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307 |
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} else {
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308 |
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prevPtr->nextPtr = timerHandlerPtr->nextPtr;
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309 |
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}
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310 |
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ckfree((char *) timerHandlerPtr);
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311 |
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return;
|
312 |
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}
|
313 |
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}
|
314 |
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315 |
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/*
|
316 |
|
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*----------------------------------------------------------------------
|
317 |
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*
|
318 |
|
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* TimerSetupProc --
|
319 |
|
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*
|
320 |
|
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* This function is called by Tcl_DoOneEvent to setup the timer
|
321 |
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* event source for before blocking. This routine checks both the
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322 |
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* idle and after timer lists.
|
323 |
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*
|
324 |
|
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* Results:
|
325 |
|
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* None.
|
326 |
|
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*
|
327 |
|
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* Side effects:
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328 |
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|
* May update the maximum notifier block time.
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329 |
|
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*
|
330 |
|
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*----------------------------------------------------------------------
|
331 |
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*/
|
332 |
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|
333 |
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static void
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334 |
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TimerSetupProc(data, flags)
|
335 |
|
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ClientData data; /* Not used. */
|
336 |
|
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int flags; /* Event flags as passed to Tcl_DoOneEvent. */
|
337 |
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{
|
338 |
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Tcl_Time blockTime;
|
339 |
|
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ThreadSpecificData *tsdPtr = InitTimer();
|
340 |
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|
341 |
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if (((flags & TCL_IDLE_EVENTS) && tsdPtr->idleList)
|
342 |
|
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|| ((flags & TCL_TIMER_EVENTS) && tsdPtr->timerPending)) {
|
343 |
|
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/*
|
344 |
|
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* There is an idle handler or a pending timer event, so just poll.
|
345 |
|
|
*/
|
346 |
|
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|
347 |
|
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blockTime.sec = 0;
|
348 |
|
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blockTime.usec = 0;
|
349 |
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|
|
350 |
|
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} else if ((flags & TCL_TIMER_EVENTS) && tsdPtr->firstTimerHandlerPtr) {
|
351 |
|
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/*
|
352 |
|
|
* Compute the timeout for the next timer on the list.
|
353 |
|
|
*/
|
354 |
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|
355 |
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TclpGetTime(&blockTime);
|
356 |
|
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blockTime.sec = tsdPtr->firstTimerHandlerPtr->time.sec - blockTime.sec;
|
357 |
|
|
blockTime.usec = tsdPtr->firstTimerHandlerPtr->time.usec -
|
358 |
|
|
blockTime.usec;
|
359 |
|
|
if (blockTime.usec < 0) {
|
360 |
|
|
blockTime.sec -= 1;
|
361 |
|
|
blockTime.usec += 1000000;
|
362 |
|
|
}
|
363 |
|
|
if (blockTime.sec < 0) {
|
364 |
|
|
blockTime.sec = 0;
|
365 |
|
|
blockTime.usec = 0;
|
366 |
|
|
}
|
367 |
|
|
} else {
|
368 |
|
|
return;
|
369 |
|
|
}
|
370 |
|
|
|
371 |
|
|
Tcl_SetMaxBlockTime(&blockTime);
|
372 |
|
|
}
|
373 |
|
|
|
374 |
|
|
/*
|
375 |
|
|
*----------------------------------------------------------------------
|
376 |
|
|
*
|
377 |
|
|
* TimerCheckProc --
|
378 |
|
|
*
|
379 |
|
|
* This function is called by Tcl_DoOneEvent to check the timer
|
380 |
|
|
* event source for events. This routine checks both the
|
381 |
|
|
* idle and after timer lists.
|
382 |
|
|
*
|
383 |
|
|
* Results:
|
384 |
|
|
* None.
|
385 |
|
|
*
|
386 |
|
|
* Side effects:
|
387 |
|
|
* May queue an event and update the maximum notifier block time.
|
388 |
|
|
*
|
389 |
|
|
*----------------------------------------------------------------------
|
390 |
|
|
*/
|
391 |
|
|
|
392 |
|
|
static void
|
393 |
|
|
TimerCheckProc(data, flags)
|
394 |
|
|
ClientData data; /* Not used. */
|
395 |
|
|
int flags; /* Event flags as passed to Tcl_DoOneEvent. */
|
396 |
|
|
{
|
397 |
|
|
Tcl_Event *timerEvPtr;
|
398 |
|
|
Tcl_Time blockTime;
|
399 |
|
|
ThreadSpecificData *tsdPtr = InitTimer();
|
400 |
|
|
|
401 |
|
|
if ((flags & TCL_TIMER_EVENTS) && tsdPtr->firstTimerHandlerPtr) {
|
402 |
|
|
/*
|
403 |
|
|
* Compute the timeout for the next timer on the list.
|
404 |
|
|
*/
|
405 |
|
|
|
406 |
|
|
TclpGetTime(&blockTime);
|
407 |
|
|
blockTime.sec = tsdPtr->firstTimerHandlerPtr->time.sec - blockTime.sec;
|
408 |
|
|
blockTime.usec = tsdPtr->firstTimerHandlerPtr->time.usec -
|
409 |
|
|
blockTime.usec;
|
410 |
|
|
if (blockTime.usec < 0) {
|
411 |
|
|
blockTime.sec -= 1;
|
412 |
|
|
blockTime.usec += 1000000;
|
413 |
|
|
}
|
414 |
|
|
if (blockTime.sec < 0) {
|
415 |
|
|
blockTime.sec = 0;
|
416 |
|
|
blockTime.usec = 0;
|
417 |
|
|
}
|
418 |
|
|
|
419 |
|
|
/*
|
420 |
|
|
* If the first timer has expired, stick an event on the queue.
|
421 |
|
|
*/
|
422 |
|
|
|
423 |
|
|
if (blockTime.sec == 0 && blockTime.usec == 0 &&
|
424 |
|
|
!tsdPtr->timerPending) {
|
425 |
|
|
tsdPtr->timerPending = 1;
|
426 |
|
|
timerEvPtr = (Tcl_Event *) ckalloc(sizeof(Tcl_Event));
|
427 |
|
|
timerEvPtr->proc = TimerHandlerEventProc;
|
428 |
|
|
Tcl_QueueEvent(timerEvPtr, TCL_QUEUE_TAIL);
|
429 |
|
|
}
|
430 |
|
|
}
|
431 |
|
|
}
|
432 |
|
|
|
433 |
|
|
/*
|
434 |
|
|
*----------------------------------------------------------------------
|
435 |
|
|
*
|
436 |
|
|
* TimerHandlerEventProc --
|
437 |
|
|
*
|
438 |
|
|
* This procedure is called by Tcl_ServiceEvent when a timer event
|
439 |
|
|
* reaches the front of the event queue. This procedure handles
|
440 |
|
|
* the event by invoking the callbacks for all timers that are
|
441 |
|
|
* ready.
|
442 |
|
|
*
|
443 |
|
|
* Results:
|
444 |
|
|
* Returns 1 if the event was handled, meaning it should be removed
|
445 |
|
|
* from the queue. Returns 0 if the event was not handled, meaning
|
446 |
|
|
* it should stay on the queue. The only time the event isn't
|
447 |
|
|
* handled is if the TCL_TIMER_EVENTS flag bit isn't set.
|
448 |
|
|
*
|
449 |
|
|
* Side effects:
|
450 |
|
|
* Whatever the timer handler callback procedures do.
|
451 |
|
|
*
|
452 |
|
|
*----------------------------------------------------------------------
|
453 |
|
|
*/
|
454 |
|
|
|
455 |
|
|
static int
|
456 |
|
|
TimerHandlerEventProc(evPtr, flags)
|
457 |
|
|
Tcl_Event *evPtr; /* Event to service. */
|
458 |
|
|
int flags; /* Flags that indicate what events to
|
459 |
|
|
* handle, such as TCL_FILE_EVENTS. */
|
460 |
|
|
{
|
461 |
|
|
TimerHandler *timerHandlerPtr, **nextPtrPtr;
|
462 |
|
|
Tcl_Time time;
|
463 |
|
|
int currentTimerId;
|
464 |
|
|
ThreadSpecificData *tsdPtr = InitTimer();
|
465 |
|
|
|
466 |
|
|
/*
|
467 |
|
|
* Do nothing if timers aren't enabled. This leaves the event on the
|
468 |
|
|
* queue, so we will get to it as soon as ServiceEvents() is called
|
469 |
|
|
* with timers enabled.
|
470 |
|
|
*/
|
471 |
|
|
|
472 |
|
|
if (!(flags & TCL_TIMER_EVENTS)) {
|
473 |
|
|
return 0;
|
474 |
|
|
}
|
475 |
|
|
|
476 |
|
|
/*
|
477 |
|
|
* The code below is trickier than it may look, for the following
|
478 |
|
|
* reasons:
|
479 |
|
|
*
|
480 |
|
|
* 1. New handlers can get added to the list while the current
|
481 |
|
|
* one is being processed. If new ones get added, we don't
|
482 |
|
|
* want to process them during this pass through the list to avoid
|
483 |
|
|
* starving other event sources. This is implemented using the
|
484 |
|
|
* token number in the handler: new handlers will have a
|
485 |
|
|
* newer token than any of the ones currently on the list.
|
486 |
|
|
* 2. The handler can call Tcl_DoOneEvent, so we have to remove
|
487 |
|
|
* the handler from the list before calling it. Otherwise an
|
488 |
|
|
* infinite loop could result.
|
489 |
|
|
* 3. Tcl_DeleteTimerHandler can be called to remove an element from
|
490 |
|
|
* the list while a handler is executing, so the list could
|
491 |
|
|
* change structure during the call.
|
492 |
|
|
* 4. Because we only fetch the current time before entering the loop,
|
493 |
|
|
* the only way a new timer will even be considered runnable is if
|
494 |
|
|
* its expiration time is within the same millisecond as the
|
495 |
|
|
* current time. This is fairly likely on Windows, since it has
|
496 |
|
|
* a course granularity clock. Since timers are placed
|
497 |
|
|
* on the queue in time order with the most recently created
|
498 |
|
|
* handler appearing after earlier ones with the same expiration
|
499 |
|
|
* time, we don't have to worry about newer generation timers
|
500 |
|
|
* appearing before later ones.
|
501 |
|
|
*/
|
502 |
|
|
|
503 |
|
|
tsdPtr->timerPending = 0;
|
504 |
|
|
currentTimerId = tsdPtr->lastTimerId;
|
505 |
|
|
TclpGetTime(&time);
|
506 |
|
|
while (1) {
|
507 |
|
|
nextPtrPtr = &tsdPtr->firstTimerHandlerPtr;
|
508 |
|
|
timerHandlerPtr = tsdPtr->firstTimerHandlerPtr;
|
509 |
|
|
if (timerHandlerPtr == NULL) {
|
510 |
|
|
break;
|
511 |
|
|
}
|
512 |
|
|
|
513 |
|
|
if ((timerHandlerPtr->time.sec > time.sec)
|
514 |
|
|
|| ((timerHandlerPtr->time.sec == time.sec)
|
515 |
|
|
&& (timerHandlerPtr->time.usec > time.usec))) {
|
516 |
|
|
break;
|
517 |
|
|
}
|
518 |
|
|
|
519 |
|
|
/*
|
520 |
|
|
* Bail out if the next timer is of a newer generation.
|
521 |
|
|
*/
|
522 |
|
|
|
523 |
|
|
if ((currentTimerId - (int)timerHandlerPtr->token) < 0) {
|
524 |
|
|
break;
|
525 |
|
|
}
|
526 |
|
|
|
527 |
|
|
/*
|
528 |
|
|
* Remove the handler from the queue before invoking it,
|
529 |
|
|
* to avoid potential reentrancy problems.
|
530 |
|
|
*/
|
531 |
|
|
|
532 |
|
|
(*nextPtrPtr) = timerHandlerPtr->nextPtr;
|
533 |
|
|
(*timerHandlerPtr->proc)(timerHandlerPtr->clientData);
|
534 |
|
|
ckfree((char *) timerHandlerPtr);
|
535 |
|
|
}
|
536 |
|
|
TimerSetupProc(NULL, TCL_TIMER_EVENTS);
|
537 |
|
|
return 1;
|
538 |
|
|
}
|
539 |
|
|
|
540 |
|
|
/*
|
541 |
|
|
*--------------------------------------------------------------
|
542 |
|
|
*
|
543 |
|
|
* Tcl_DoWhenIdle --
|
544 |
|
|
*
|
545 |
|
|
* Arrange for proc to be invoked the next time the system is
|
546 |
|
|
* idle (i.e., just before the next time that Tcl_DoOneEvent
|
547 |
|
|
* would have to wait for something to happen).
|
548 |
|
|
*
|
549 |
|
|
* Results:
|
550 |
|
|
* None.
|
551 |
|
|
*
|
552 |
|
|
* Side effects:
|
553 |
|
|
* Proc will eventually be called, with clientData as argument.
|
554 |
|
|
* See the manual entry for details.
|
555 |
|
|
*
|
556 |
|
|
*--------------------------------------------------------------
|
557 |
|
|
*/
|
558 |
|
|
|
559 |
|
|
void
|
560 |
|
|
Tcl_DoWhenIdle(proc, clientData)
|
561 |
|
|
Tcl_IdleProc *proc; /* Procedure to invoke. */
|
562 |
|
|
ClientData clientData; /* Arbitrary value to pass to proc. */
|
563 |
|
|
{
|
564 |
|
|
register IdleHandler *idlePtr;
|
565 |
|
|
Tcl_Time blockTime;
|
566 |
|
|
ThreadSpecificData *tsdPtr = InitTimer();
|
567 |
|
|
|
568 |
|
|
idlePtr = (IdleHandler *) ckalloc(sizeof(IdleHandler));
|
569 |
|
|
idlePtr->proc = proc;
|
570 |
|
|
idlePtr->clientData = clientData;
|
571 |
|
|
idlePtr->generation = tsdPtr->idleGeneration;
|
572 |
|
|
idlePtr->nextPtr = NULL;
|
573 |
|
|
if (tsdPtr->lastIdlePtr == NULL) {
|
574 |
|
|
tsdPtr->idleList = idlePtr;
|
575 |
|
|
} else {
|
576 |
|
|
tsdPtr->lastIdlePtr->nextPtr = idlePtr;
|
577 |
|
|
}
|
578 |
|
|
tsdPtr->lastIdlePtr = idlePtr;
|
579 |
|
|
|
580 |
|
|
blockTime.sec = 0;
|
581 |
|
|
blockTime.usec = 0;
|
582 |
|
|
Tcl_SetMaxBlockTime(&blockTime);
|
583 |
|
|
}
|
584 |
|
|
|
585 |
|
|
/*
|
586 |
|
|
*----------------------------------------------------------------------
|
587 |
|
|
*
|
588 |
|
|
* Tcl_CancelIdleCall --
|
589 |
|
|
*
|
590 |
|
|
* If there are any when-idle calls requested to a given procedure
|
591 |
|
|
* with given clientData, cancel all of them.
|
592 |
|
|
*
|
593 |
|
|
* Results:
|
594 |
|
|
* None.
|
595 |
|
|
*
|
596 |
|
|
* Side effects:
|
597 |
|
|
* If the proc/clientData combination were on the when-idle list,
|
598 |
|
|
* they are removed so that they will never be called.
|
599 |
|
|
*
|
600 |
|
|
*----------------------------------------------------------------------
|
601 |
|
|
*/
|
602 |
|
|
|
603 |
|
|
void
|
604 |
|
|
Tcl_CancelIdleCall(proc, clientData)
|
605 |
|
|
Tcl_IdleProc *proc; /* Procedure that was previously registered. */
|
606 |
|
|
ClientData clientData; /* Arbitrary value to pass to proc. */
|
607 |
|
|
{
|
608 |
|
|
register IdleHandler *idlePtr, *prevPtr;
|
609 |
|
|
IdleHandler *nextPtr;
|
610 |
|
|
ThreadSpecificData *tsdPtr = InitTimer();
|
611 |
|
|
|
612 |
|
|
for (prevPtr = NULL, idlePtr = tsdPtr->idleList; idlePtr != NULL;
|
613 |
|
|
prevPtr = idlePtr, idlePtr = idlePtr->nextPtr) {
|
614 |
|
|
while ((idlePtr->proc == proc)
|
615 |
|
|
&& (idlePtr->clientData == clientData)) {
|
616 |
|
|
nextPtr = idlePtr->nextPtr;
|
617 |
|
|
ckfree((char *) idlePtr);
|
618 |
|
|
idlePtr = nextPtr;
|
619 |
|
|
if (prevPtr == NULL) {
|
620 |
|
|
tsdPtr->idleList = idlePtr;
|
621 |
|
|
} else {
|
622 |
|
|
prevPtr->nextPtr = idlePtr;
|
623 |
|
|
}
|
624 |
|
|
if (idlePtr == NULL) {
|
625 |
|
|
tsdPtr->lastIdlePtr = prevPtr;
|
626 |
|
|
return;
|
627 |
|
|
}
|
628 |
|
|
}
|
629 |
|
|
}
|
630 |
|
|
}
|
631 |
|
|
|
632 |
|
|
/*
|
633 |
|
|
*----------------------------------------------------------------------
|
634 |
|
|
*
|
635 |
|
|
* TclServiceIdle --
|
636 |
|
|
*
|
637 |
|
|
* This procedure is invoked by the notifier when it becomes
|
638 |
|
|
* idle. It will invoke all idle handlers that are present at
|
639 |
|
|
* the time the call is invoked, but not those added during idle
|
640 |
|
|
* processing.
|
641 |
|
|
*
|
642 |
|
|
* Results:
|
643 |
|
|
* The return value is 1 if TclServiceIdle found something to
|
644 |
|
|
* do, otherwise return value is 0.
|
645 |
|
|
*
|
646 |
|
|
* Side effects:
|
647 |
|
|
* Invokes all pending idle handlers.
|
648 |
|
|
*
|
649 |
|
|
*----------------------------------------------------------------------
|
650 |
|
|
*/
|
651 |
|
|
|
652 |
|
|
int
|
653 |
|
|
TclServiceIdle()
|
654 |
|
|
{
|
655 |
|
|
IdleHandler *idlePtr;
|
656 |
|
|
int oldGeneration;
|
657 |
|
|
Tcl_Time blockTime;
|
658 |
|
|
ThreadSpecificData *tsdPtr = InitTimer();
|
659 |
|
|
|
660 |
|
|
if (tsdPtr->idleList == NULL) {
|
661 |
|
|
return 0;
|
662 |
|
|
}
|
663 |
|
|
|
664 |
|
|
oldGeneration = tsdPtr->idleGeneration;
|
665 |
|
|
tsdPtr->idleGeneration++;
|
666 |
|
|
|
667 |
|
|
/*
|
668 |
|
|
* The code below is trickier than it may look, for the following
|
669 |
|
|
* reasons:
|
670 |
|
|
*
|
671 |
|
|
* 1. New handlers can get added to the list while the current
|
672 |
|
|
* one is being processed. If new ones get added, we don't
|
673 |
|
|
* want to process them during this pass through the list (want
|
674 |
|
|
* to check for other work to do first). This is implemented
|
675 |
|
|
* using the generation number in the handler: new handlers
|
676 |
|
|
* will have a different generation than any of the ones currently
|
677 |
|
|
* on the list.
|
678 |
|
|
* 2. The handler can call Tcl_DoOneEvent, so we have to remove
|
679 |
|
|
* the handler from the list before calling it. Otherwise an
|
680 |
|
|
* infinite loop could result.
|
681 |
|
|
* 3. Tcl_CancelIdleCall can be called to remove an element from
|
682 |
|
|
* the list while a handler is executing, so the list could
|
683 |
|
|
* change structure during the call.
|
684 |
|
|
*/
|
685 |
|
|
|
686 |
|
|
for (idlePtr = tsdPtr->idleList;
|
687 |
|
|
((idlePtr != NULL)
|
688 |
|
|
&& ((oldGeneration - idlePtr->generation) >= 0));
|
689 |
|
|
idlePtr = tsdPtr->idleList) {
|
690 |
|
|
tsdPtr->idleList = idlePtr->nextPtr;
|
691 |
|
|
if (tsdPtr->idleList == NULL) {
|
692 |
|
|
tsdPtr->lastIdlePtr = NULL;
|
693 |
|
|
}
|
694 |
|
|
(*idlePtr->proc)(idlePtr->clientData);
|
695 |
|
|
ckfree((char *) idlePtr);
|
696 |
|
|
}
|
697 |
|
|
if (tsdPtr->idleList) {
|
698 |
|
|
blockTime.sec = 0;
|
699 |
|
|
blockTime.usec = 0;
|
700 |
|
|
Tcl_SetMaxBlockTime(&blockTime);
|
701 |
|
|
}
|
702 |
|
|
return 1;
|
703 |
|
|
}
|
704 |
|
|
|
705 |
|
|
/*
|
706 |
|
|
*----------------------------------------------------------------------
|
707 |
|
|
*
|
708 |
|
|
* Tcl_AfterObjCmd --
|
709 |
|
|
*
|
710 |
|
|
* This procedure is invoked to process the "after" Tcl command.
|
711 |
|
|
* See the user documentation for details on what it does.
|
712 |
|
|
*
|
713 |
|
|
* Results:
|
714 |
|
|
* A standard Tcl result.
|
715 |
|
|
*
|
716 |
|
|
* Side effects:
|
717 |
|
|
* See the user documentation.
|
718 |
|
|
*
|
719 |
|
|
*----------------------------------------------------------------------
|
720 |
|
|
*/
|
721 |
|
|
|
722 |
|
|
/* ARGSUSED */
|
723 |
|
|
int
|
724 |
|
|
Tcl_AfterObjCmd(clientData, interp, objc, objv)
|
725 |
|
|
ClientData clientData; /* Points to the "tclAfter" assocData for
|
726 |
|
|
* this interpreter, or NULL if the assocData
|
727 |
|
|
* hasn't been created yet.*/
|
728 |
|
|
Tcl_Interp *interp; /* Current interpreter. */
|
729 |
|
|
int objc; /* Number of arguments. */
|
730 |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */
|
731 |
|
|
{
|
732 |
|
|
int ms;
|
733 |
|
|
AfterInfo *afterPtr;
|
734 |
|
|
AfterAssocData *assocPtr = (AfterAssocData *) clientData;
|
735 |
|
|
Tcl_CmdInfo cmdInfo;
|
736 |
|
|
int length;
|
737 |
|
|
char *argString;
|
738 |
|
|
int index;
|
739 |
|
|
char buf[16 + TCL_INTEGER_SPACE];
|
740 |
|
|
static char *afterSubCmds[] = {"cancel", "idle", "info", (char *) NULL};
|
741 |
|
|
enum afterSubCmds {AFTER_CANCEL, AFTER_IDLE, AFTER_INFO};
|
742 |
|
|
ThreadSpecificData *tsdPtr = InitTimer();
|
743 |
|
|
|
744 |
|
|
if (objc < 2) {
|
745 |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?");
|
746 |
|
|
return TCL_ERROR;
|
747 |
|
|
}
|
748 |
|
|
|
749 |
|
|
/*
|
750 |
|
|
* Create the "after" information associated for this interpreter,
|
751 |
|
|
* if it doesn't already exist. Associate it with the command too,
|
752 |
|
|
* so that it will be passed in as the ClientData argument in the
|
753 |
|
|
* future.
|
754 |
|
|
*/
|
755 |
|
|
|
756 |
|
|
if (assocPtr == NULL) {
|
757 |
|
|
assocPtr = (AfterAssocData *) ckalloc(sizeof(AfterAssocData));
|
758 |
|
|
assocPtr->interp = interp;
|
759 |
|
|
assocPtr->firstAfterPtr = NULL;
|
760 |
|
|
Tcl_SetAssocData(interp, "tclAfter", AfterCleanupProc,
|
761 |
|
|
(ClientData) assocPtr);
|
762 |
|
|
cmdInfo.proc = NULL;
|
763 |
|
|
cmdInfo.clientData = (ClientData) NULL;
|
764 |
|
|
cmdInfo.objProc = Tcl_AfterObjCmd;
|
765 |
|
|
cmdInfo.objClientData = (ClientData) assocPtr;
|
766 |
|
|
cmdInfo.deleteProc = NULL;
|
767 |
|
|
cmdInfo.deleteData = (ClientData) assocPtr;
|
768 |
|
|
Tcl_SetCommandInfo(interp, Tcl_GetStringFromObj(objv[0], &length),
|
769 |
|
|
&cmdInfo);
|
770 |
|
|
}
|
771 |
|
|
|
772 |
|
|
/*
|
773 |
|
|
* First lets see if the command was passed a number as the first argument.
|
774 |
|
|
*/
|
775 |
|
|
|
776 |
|
|
if (objv[1]->typePtr == &tclIntType) {
|
777 |
|
|
ms = (int) objv[1]->internalRep.longValue;
|
778 |
|
|
goto processInteger;
|
779 |
|
|
}
|
780 |
|
|
argString = Tcl_GetStringFromObj(objv[1], &length);
|
781 |
|
|
if (isdigit(UCHAR(argString[0]))) { /* INTL: digit */
|
782 |
|
|
if (Tcl_GetIntFromObj(interp, objv[1], &ms) != TCL_OK) {
|
783 |
|
|
return TCL_ERROR;
|
784 |
|
|
}
|
785 |
|
|
processInteger:
|
786 |
|
|
if (ms < 0) {
|
787 |
|
|
ms = 0;
|
788 |
|
|
}
|
789 |
|
|
if (objc == 2) {
|
790 |
|
|
Tcl_Sleep(ms);
|
791 |
|
|
return TCL_OK;
|
792 |
|
|
}
|
793 |
|
|
afterPtr = (AfterInfo *) ckalloc((unsigned) (sizeof(AfterInfo)));
|
794 |
|
|
afterPtr->assocPtr = assocPtr;
|
795 |
|
|
if (objc == 3) {
|
796 |
|
|
afterPtr->commandPtr = objv[2];
|
797 |
|
|
} else {
|
798 |
|
|
afterPtr->commandPtr = Tcl_ConcatObj(objc-2, objv+2);
|
799 |
|
|
}
|
800 |
|
|
Tcl_IncrRefCount(afterPtr->commandPtr);
|
801 |
|
|
/*
|
802 |
|
|
* The variable below is used to generate unique identifiers for
|
803 |
|
|
* after commands. This id can wrap around, which can potentially
|
804 |
|
|
* cause problems. However, there are not likely to be problems
|
805 |
|
|
* in practice, because after commands can only be requested to
|
806 |
|
|
* about a month in the future, and wrap-around is unlikely to
|
807 |
|
|
* occur in less than about 1-10 years. Thus it's unlikely that
|
808 |
|
|
* any old ids will still be around when wrap-around occurs.
|
809 |
|
|
*/
|
810 |
|
|
afterPtr->id = tsdPtr->afterId;
|
811 |
|
|
tsdPtr->afterId += 1;
|
812 |
|
|
afterPtr->token = Tcl_CreateTimerHandler(ms, AfterProc,
|
813 |
|
|
(ClientData) afterPtr);
|
814 |
|
|
afterPtr->nextPtr = assocPtr->firstAfterPtr;
|
815 |
|
|
assocPtr->firstAfterPtr = afterPtr;
|
816 |
|
|
sprintf(buf, "after#%d", afterPtr->id);
|
817 |
|
|
Tcl_AppendResult(interp, buf, (char *) NULL);
|
818 |
|
|
return TCL_OK;
|
819 |
|
|
}
|
820 |
|
|
|
821 |
|
|
/*
|
822 |
|
|
* If it's not a number it must be a subcommand.
|
823 |
|
|
*/
|
824 |
|
|
|
825 |
|
|
if (Tcl_GetIndexFromObj(NULL, objv[1], afterSubCmds, "argument",
|
826 |
|
|
0, &index) != TCL_OK) {
|
827 |
|
|
Tcl_AppendResult(interp, "bad argument \"", argString,
|
828 |
|
|
"\": must be cancel, idle, info, or a number",
|
829 |
|
|
(char *) NULL);
|
830 |
|
|
return TCL_ERROR;
|
831 |
|
|
}
|
832 |
|
|
switch ((enum afterSubCmds) index) {
|
833 |
|
|
case AFTER_CANCEL: {
|
834 |
|
|
Tcl_Obj *commandPtr;
|
835 |
|
|
char *command, *tempCommand;
|
836 |
|
|
int tempLength;
|
837 |
|
|
|
838 |
|
|
if (objc < 3) {
|
839 |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "id|command");
|
840 |
|
|
return TCL_ERROR;
|
841 |
|
|
}
|
842 |
|
|
if (objc == 3) {
|
843 |
|
|
commandPtr = objv[2];
|
844 |
|
|
} else {
|
845 |
|
|
commandPtr = Tcl_ConcatObj(objc-2, objv+2);;
|
846 |
|
|
}
|
847 |
|
|
command = Tcl_GetStringFromObj(commandPtr, &length);
|
848 |
|
|
for (afterPtr = assocPtr->firstAfterPtr; afterPtr != NULL;
|
849 |
|
|
afterPtr = afterPtr->nextPtr) {
|
850 |
|
|
tempCommand = Tcl_GetStringFromObj(afterPtr->commandPtr,
|
851 |
|
|
&tempLength);
|
852 |
|
|
if ((length == tempLength)
|
853 |
|
|
&& (memcmp((void*) command, (void*) tempCommand,
|
854 |
|
|
(unsigned) length) == 0)) {
|
855 |
|
|
break;
|
856 |
|
|
}
|
857 |
|
|
}
|
858 |
|
|
if (afterPtr == NULL) {
|
859 |
|
|
afterPtr = GetAfterEvent(assocPtr, commandPtr);
|
860 |
|
|
}
|
861 |
|
|
if (objc != 3) {
|
862 |
|
|
Tcl_DecrRefCount(commandPtr);
|
863 |
|
|
}
|
864 |
|
|
if (afterPtr != NULL) {
|
865 |
|
|
if (afterPtr->token != NULL) {
|
866 |
|
|
Tcl_DeleteTimerHandler(afterPtr->token);
|
867 |
|
|
} else {
|
868 |
|
|
Tcl_CancelIdleCall(AfterProc, (ClientData) afterPtr);
|
869 |
|
|
}
|
870 |
|
|
FreeAfterPtr(afterPtr);
|
871 |
|
|
}
|
872 |
|
|
break;
|
873 |
|
|
}
|
874 |
|
|
case AFTER_IDLE:
|
875 |
|
|
if (objc < 3) {
|
876 |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "script script ...");
|
877 |
|
|
return TCL_ERROR;
|
878 |
|
|
}
|
879 |
|
|
afterPtr = (AfterInfo *) ckalloc((unsigned) (sizeof(AfterInfo)));
|
880 |
|
|
afterPtr->assocPtr = assocPtr;
|
881 |
|
|
if (objc == 3) {
|
882 |
|
|
afterPtr->commandPtr = objv[2];
|
883 |
|
|
} else {
|
884 |
|
|
afterPtr->commandPtr = Tcl_ConcatObj(objc-2, objv+2);
|
885 |
|
|
}
|
886 |
|
|
Tcl_IncrRefCount(afterPtr->commandPtr);
|
887 |
|
|
afterPtr->id = tsdPtr->afterId;
|
888 |
|
|
tsdPtr->afterId += 1;
|
889 |
|
|
afterPtr->token = NULL;
|
890 |
|
|
afterPtr->nextPtr = assocPtr->firstAfterPtr;
|
891 |
|
|
assocPtr->firstAfterPtr = afterPtr;
|
892 |
|
|
Tcl_DoWhenIdle(AfterProc, (ClientData) afterPtr);
|
893 |
|
|
sprintf(buf, "after#%d", afterPtr->id);
|
894 |
|
|
Tcl_AppendResult(interp, buf, (char *) NULL);
|
895 |
|
|
break;
|
896 |
|
|
case AFTER_INFO: {
|
897 |
|
|
Tcl_Obj *resultListPtr;
|
898 |
|
|
|
899 |
|
|
if (objc == 2) {
|
900 |
|
|
for (afterPtr = assocPtr->firstAfterPtr; afterPtr != NULL;
|
901 |
|
|
afterPtr = afterPtr->nextPtr) {
|
902 |
|
|
if (assocPtr->interp == interp) {
|
903 |
|
|
sprintf(buf, "after#%d", afterPtr->id);
|
904 |
|
|
Tcl_AppendElement(interp, buf);
|
905 |
|
|
}
|
906 |
|
|
}
|
907 |
|
|
return TCL_OK;
|
908 |
|
|
}
|
909 |
|
|
if (objc != 3) {
|
910 |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "?id?");
|
911 |
|
|
return TCL_ERROR;
|
912 |
|
|
}
|
913 |
|
|
afterPtr = GetAfterEvent(assocPtr, objv[2]);
|
914 |
|
|
if (afterPtr == NULL) {
|
915 |
|
|
Tcl_AppendResult(interp, "event \"", Tcl_GetString(objv[2]),
|
916 |
|
|
"\" doesn't exist", (char *) NULL);
|
917 |
|
|
return TCL_ERROR;
|
918 |
|
|
}
|
919 |
|
|
resultListPtr = Tcl_GetObjResult(interp);
|
920 |
|
|
Tcl_ListObjAppendElement(interp, resultListPtr, afterPtr->commandPtr);
|
921 |
|
|
Tcl_ListObjAppendElement(interp, resultListPtr, Tcl_NewStringObj(
|
922 |
|
|
(afterPtr->token == NULL) ? "idle" : "timer", -1));
|
923 |
|
|
Tcl_SetObjResult(interp, resultListPtr);
|
924 |
|
|
break;
|
925 |
|
|
}
|
926 |
|
|
default: {
|
927 |
|
|
panic("Tcl_AfterObjCmd: bad subcommand index to afterSubCmds");
|
928 |
|
|
}
|
929 |
|
|
}
|
930 |
|
|
return TCL_OK;
|
931 |
|
|
}
|
932 |
|
|
|
933 |
|
|
/*
|
934 |
|
|
*----------------------------------------------------------------------
|
935 |
|
|
*
|
936 |
|
|
* GetAfterEvent --
|
937 |
|
|
*
|
938 |
|
|
* This procedure parses an "after" id such as "after#4" and
|
939 |
|
|
* returns a pointer to the AfterInfo structure.
|
940 |
|
|
*
|
941 |
|
|
* Results:
|
942 |
|
|
* The return value is either a pointer to an AfterInfo structure,
|
943 |
|
|
* if one is found that corresponds to "cmdString" and is for interp,
|
944 |
|
|
* or NULL if no corresponding after event can be found.
|
945 |
|
|
*
|
946 |
|
|
* Side effects:
|
947 |
|
|
* None.
|
948 |
|
|
*
|
949 |
|
|
*----------------------------------------------------------------------
|
950 |
|
|
*/
|
951 |
|
|
|
952 |
|
|
static AfterInfo *
|
953 |
|
|
GetAfterEvent(assocPtr, commandPtr)
|
954 |
|
|
AfterAssocData *assocPtr; /* Points to "after"-related information for
|
955 |
|
|
* this interpreter. */
|
956 |
|
|
Tcl_Obj *commandPtr;
|
957 |
|
|
{
|
958 |
|
|
char *cmdString; /* Textual identifier for after event, such
|
959 |
|
|
* as "after#6". */
|
960 |
|
|
AfterInfo *afterPtr;
|
961 |
|
|
int id;
|
962 |
|
|
char *end;
|
963 |
|
|
|
964 |
|
|
cmdString = Tcl_GetString(commandPtr);
|
965 |
|
|
if (strncmp(cmdString, "after#", 6) != 0) {
|
966 |
|
|
return NULL;
|
967 |
|
|
}
|
968 |
|
|
cmdString += 6;
|
969 |
|
|
id = strtoul(cmdString, &end, 10);
|
970 |
|
|
if ((end == cmdString) || (*end != 0)) {
|
971 |
|
|
return NULL;
|
972 |
|
|
}
|
973 |
|
|
for (afterPtr = assocPtr->firstAfterPtr; afterPtr != NULL;
|
974 |
|
|
afterPtr = afterPtr->nextPtr) {
|
975 |
|
|
if (afterPtr->id == id) {
|
976 |
|
|
return afterPtr;
|
977 |
|
|
}
|
978 |
|
|
}
|
979 |
|
|
return NULL;
|
980 |
|
|
}
|
981 |
|
|
|
982 |
|
|
/*
|
983 |
|
|
*----------------------------------------------------------------------
|
984 |
|
|
*
|
985 |
|
|
* AfterProc --
|
986 |
|
|
*
|
987 |
|
|
* Timer callback to execute commands registered with the
|
988 |
|
|
* "after" command.
|
989 |
|
|
*
|
990 |
|
|
* Results:
|
991 |
|
|
* None.
|
992 |
|
|
*
|
993 |
|
|
* Side effects:
|
994 |
|
|
* Executes whatever command was specified. If the command
|
995 |
|
|
* returns an error, then the command "bgerror" is invoked
|
996 |
|
|
* to process the error; if bgerror fails then information
|
997 |
|
|
* about the error is output on stderr.
|
998 |
|
|
*
|
999 |
|
|
*----------------------------------------------------------------------
|
1000 |
|
|
*/
|
1001 |
|
|
|
1002 |
|
|
static void
|
1003 |
|
|
AfterProc(clientData)
|
1004 |
|
|
ClientData clientData; /* Describes command to execute. */
|
1005 |
|
|
{
|
1006 |
|
|
AfterInfo *afterPtr = (AfterInfo *) clientData;
|
1007 |
|
|
AfterAssocData *assocPtr = afterPtr->assocPtr;
|
1008 |
|
|
AfterInfo *prevPtr;
|
1009 |
|
|
int result;
|
1010 |
|
|
Tcl_Interp *interp;
|
1011 |
|
|
char *script;
|
1012 |
|
|
int numBytes;
|
1013 |
|
|
|
1014 |
|
|
/*
|
1015 |
|
|
* First remove the callback from our list of callbacks; otherwise
|
1016 |
|
|
* someone could delete the callback while it's being executed, which
|
1017 |
|
|
* could cause a core dump.
|
1018 |
|
|
*/
|
1019 |
|
|
|
1020 |
|
|
if (assocPtr->firstAfterPtr == afterPtr) {
|
1021 |
|
|
assocPtr->firstAfterPtr = afterPtr->nextPtr;
|
1022 |
|
|
} else {
|
1023 |
|
|
for (prevPtr = assocPtr->firstAfterPtr; prevPtr->nextPtr != afterPtr;
|
1024 |
|
|
prevPtr = prevPtr->nextPtr) {
|
1025 |
|
|
/* Empty loop body. */
|
1026 |
|
|
}
|
1027 |
|
|
prevPtr->nextPtr = afterPtr->nextPtr;
|
1028 |
|
|
}
|
1029 |
|
|
|
1030 |
|
|
/*
|
1031 |
|
|
* Execute the callback.
|
1032 |
|
|
*/
|
1033 |
|
|
|
1034 |
|
|
interp = assocPtr->interp;
|
1035 |
|
|
Tcl_Preserve((ClientData) interp);
|
1036 |
|
|
script = Tcl_GetStringFromObj(afterPtr->commandPtr, &numBytes);
|
1037 |
|
|
result = Tcl_EvalEx(interp, script, numBytes, TCL_EVAL_GLOBAL);
|
1038 |
|
|
if (result != TCL_OK) {
|
1039 |
|
|
Tcl_AddErrorInfo(interp, "\n (\"after\" script)");
|
1040 |
|
|
Tcl_BackgroundError(interp);
|
1041 |
|
|
}
|
1042 |
|
|
Tcl_Release((ClientData) interp);
|
1043 |
|
|
|
1044 |
|
|
/*
|
1045 |
|
|
* Free the memory for the callback.
|
1046 |
|
|
*/
|
1047 |
|
|
|
1048 |
|
|
Tcl_DecrRefCount(afterPtr->commandPtr);
|
1049 |
|
|
ckfree((char *) afterPtr);
|
1050 |
|
|
}
|
1051 |
|
|
|
1052 |
|
|
/*
|
1053 |
|
|
*----------------------------------------------------------------------
|
1054 |
|
|
*
|
1055 |
|
|
* FreeAfterPtr --
|
1056 |
|
|
*
|
1057 |
|
|
* This procedure removes an "after" command from the list of
|
1058 |
|
|
* those that are pending and frees its resources. This procedure
|
1059 |
|
|
* does *not* cancel the timer handler; if that's needed, the
|
1060 |
|
|
* caller must do it.
|
1061 |
|
|
*
|
1062 |
|
|
* Results:
|
1063 |
|
|
* None.
|
1064 |
|
|
*
|
1065 |
|
|
* Side effects:
|
1066 |
|
|
* The memory associated with afterPtr is released.
|
1067 |
|
|
*
|
1068 |
|
|
*----------------------------------------------------------------------
|
1069 |
|
|
*/
|
1070 |
|
|
|
1071 |
|
|
static void
|
1072 |
|
|
FreeAfterPtr(afterPtr)
|
1073 |
|
|
AfterInfo *afterPtr; /* Command to be deleted. */
|
1074 |
|
|
{
|
1075 |
|
|
AfterInfo *prevPtr;
|
1076 |
|
|
AfterAssocData *assocPtr = afterPtr->assocPtr;
|
1077 |
|
|
|
1078 |
|
|
if (assocPtr->firstAfterPtr == afterPtr) {
|
1079 |
|
|
assocPtr->firstAfterPtr = afterPtr->nextPtr;
|
1080 |
|
|
} else {
|
1081 |
|
|
for (prevPtr = assocPtr->firstAfterPtr; prevPtr->nextPtr != afterPtr;
|
1082 |
|
|
prevPtr = prevPtr->nextPtr) {
|
1083 |
|
|
/* Empty loop body. */
|
1084 |
|
|
}
|
1085 |
|
|
prevPtr->nextPtr = afterPtr->nextPtr;
|
1086 |
|
|
}
|
1087 |
|
|
Tcl_DecrRefCount(afterPtr->commandPtr);
|
1088 |
|
|
ckfree((char *) afterPtr);
|
1089 |
|
|
}
|
1090 |
|
|
|
1091 |
|
|
/*
|
1092 |
|
|
*----------------------------------------------------------------------
|
1093 |
|
|
*
|
1094 |
|
|
* AfterCleanupProc --
|
1095 |
|
|
*
|
1096 |
|
|
* This procedure is invoked whenever an interpreter is deleted
|
1097 |
|
|
* to cleanup the AssocData for "tclAfter".
|
1098 |
|
|
*
|
1099 |
|
|
* Results:
|
1100 |
|
|
* None.
|
1101 |
|
|
*
|
1102 |
|
|
* Side effects:
|
1103 |
|
|
* After commands are removed.
|
1104 |
|
|
*
|
1105 |
|
|
*----------------------------------------------------------------------
|
1106 |
|
|
*/
|
1107 |
|
|
|
1108 |
|
|
/* ARGSUSED */
|
1109 |
|
|
static void
|
1110 |
|
|
AfterCleanupProc(clientData, interp)
|
1111 |
|
|
ClientData clientData; /* Points to AfterAssocData for the
|
1112 |
|
|
* interpreter. */
|
1113 |
|
|
Tcl_Interp *interp; /* Interpreter that is being deleted. */
|
1114 |
|
|
{
|
1115 |
|
|
AfterAssocData *assocPtr = (AfterAssocData *) clientData;
|
1116 |
|
|
AfterInfo *afterPtr;
|
1117 |
|
|
|
1118 |
|
|
while (assocPtr->firstAfterPtr != NULL) {
|
1119 |
|
|
afterPtr = assocPtr->firstAfterPtr;
|
1120 |
|
|
assocPtr->firstAfterPtr = afterPtr->nextPtr;
|
1121 |
|
|
if (afterPtr->token != NULL) {
|
1122 |
|
|
Tcl_DeleteTimerHandler(afterPtr->token);
|
1123 |
|
|
} else {
|
1124 |
|
|
Tcl_CancelIdleCall(AfterProc, (ClientData) afterPtr);
|
1125 |
|
|
}
|
1126 |
|
|
Tcl_DecrRefCount(afterPtr->commandPtr);
|
1127 |
|
|
ckfree((char *) afterPtr);
|
1128 |
|
|
}
|
1129 |
|
|
ckfree((char *) assocPtr);
|
1130 |
|
|
}
|
1131 |
|
|
|
1132 |
|
|
|
1133 |
|
|
/* $History: tcltimer.c $
|
1134 |
|
|
*
|
1135 |
|
|
* ***************** Version 1 *****************
|
1136 |
|
|
* User: Dtashley Date: 1/02/01 Time: 1:05a
|
1137 |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tcl Base
|
1138 |
|
|
* Initial check-in.
|
1139 |
|
|
*/
|
1140 |
|
|
|
1141 |
|
|
/* End of TCLTIMER.C */ |