Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!ut-emx!rick
From: rick@ut-emx.uucp (Rick Watson)
Newsgroups: comp.windows.x
Subject: Re: core dump in XtRemoveTimeOut
Message-ID: <40018@ut-emx.uucp>
Date: 21 Nov 90 00:11:44 GMT
References: <1990Nov13.202552.25425@aplcen.apl.jhu.edu>
Organization: The University of Texas at Austin; Austin, Texas
Lines: 94

In article <1990Nov13.202552.25425@aplcen.apl.jhu.edu>, sue@kossy.jhuapl.edu (Sue Borchardt) writes:
> 
> I've been getting the following core dump on and off when 
> clicking on the Xw scrollbar arrow. I can't tell if it's an
> Xw problem or an Xt problem. I'm running on a Sun4 with 
> patches 1-18. 
> 

The following very unofficial patch attempts to fix the scrollbar
timer problem but also (for reasons I don't entirely remember)
disables the timer entirely.  You can try changing the "#ifdef notdef"
to see if the other fixes work for you.  No guarantees. 

Rick Watson 
The University of Texas Computation Center, 512/471-3241
   internet: rick@digate.cc.utexas.edu       bitnet: watson@utadnx
   uucp:     ...!cs.utexas.edu!ut-emx!rick   span:   utspan::utadnx::watson

*** ScrollBar.c.ORIG	Thu Feb 23 02:05:08 1989
--- ScrollBar.c	Tue Jun  5 17:57:40 1990
***************
*** 1053,1058
     /*  If the orgin was changed, set up the repeat timer and   */
     /*  invoke the application supplied slider moved callbacks  */
  
     if (flag)
     {
        sbw -> scrollbar.timerProcessing = True;

--- 1053,1059 -----
     /*  If the orgin was changed, set up the repeat timer and   */
     /*  invoke the application supplied slider moved callbacks  */
  
+ #ifdef notdef	/* timers are screwed, don't use them */
     if (flag)
     {
        sbw -> scrollbar.timerProcessing = True;
***************
*** 1063,1068
           XtAddTimeOut ((unsigned long) sbw->scrollbar.initial_delay,
                         (XtTimerCallbackProc) XwTimerEvent, (caddr_t) sbw); 
     }
  }
  
  

--- 1064,1072 -----
           XtAddTimeOut ((unsigned long) sbw->scrollbar.initial_delay,
                         (XtTimerCallbackProc) XwTimerEvent, (caddr_t) sbw); 
     }
+ #else
+    XtCallCallbacks (sbw, XtNsliderMoved, (caddr_t) origin);      
+ #endif
  }
  
  
***************
*** 1081,1086
  
     if (sbw -> scrollbar.timerProcessing)
        XtRemoveTimeOut (sbw -> scrollbar.timer);
  }
  
  

--- 1085,1091 -----
  
     if (sbw -> scrollbar.timerProcessing)
        XtRemoveTimeOut (sbw -> scrollbar.timer);
+       sbw -> scrollbar.timerProcessing = False;
  }
  
  
***************
*** 1113,1118
        XtRemoveTimeOut (sbw -> scrollbar.timer); 
     }
  
  
     /*  Get the current origin, extent, min, and max of the  */
     /*  slider in the valuator                               */

--- 1118,1128 -----
        XtRemoveTimeOut (sbw -> scrollbar.timer); 
     }
  
+ 
+    /*  get out if we're no longer processing timers */
+ 
+    if (!sbw -> scrollbar.timerProcessing)
+        return;
  
     /*  Get the current origin, extent, min, and max of the  */
     /*  slider in the valuator                               */