pepke@gw.scri.fsu.edu (Eric Pepke) (05/30/91)
Here's an interesting problem with winset on the RS/6000 workstations with
the Silicon Graphics GL library. Calling winset on different windows
above a (prohibitively slow) rate causes the mouse to freeze! I found the
problem while trying to port a 36,000 line program to the IBM.
Fortunately, I was able to distill it down to the following.
Has anybody seen this before? Does there exist a workaround? I called this
in as a severity 3 on the 13th, and yesterday I requested that it be bumped
up to a 2. It's the only problem, I think, that is preventing my code from
working on the IBM.
/*kaboom.c
Freezes the mouse on the IBM RS6000 window manager by doing
successive winsets to the GL system at above a certain rate.
Do not run this from the console or it will be a pain to stop.
Telnet in instead.
Eric Pepke
13 May 1991
*/
#include <stdio.h>
#include <gl.h>
#define BOOMDELAY 50000 /*Delay in microseconds.
Make smaller for boom.
On our system, 50000 goes boom.
75000 does not.*/
long window1, window2;
void InitWindows()
/*Initializes the two windows*/
{
minsize(300, 200);
window1 = winopen("Window One");
winset(window1);
wintitle("Window One");
minsize(300, 200);
window2 = winopen("Window Two");
winset(window2);
wintitle("Window Two");
}
main()
{
/*Initialize everything*/
InitWindows();
/*Blow up the window manager or else don't.*/
for (;;)
{
winset(window1);
usleep(BOOMDELAY);
winset(window2);
usleep(BOOMDELAY);
}
}
Eric Pepke INTERNET: pepke@gw.scri.fsu.edu
Supercomputer Computations Research Institute MFENET: pepke@fsu
Florida State University SPAN: scri::pepke
Tallahassee, FL 32306-4052 BITNET: pepke@fsu
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