jgrosh@BRL.MIL (John Grosh, IBD) (09/25/90)
We have detected a bug in IRIX 3.3.1 on the Personal Iris 4D/25G.
When the following program is compiled, the user no longer has
control of mouse events, and other graphics programs (e.g.
gr_osview) get almost no runtime. When compiled with the -DFIX
option, the O/S runs normally. Note that the POWER Series
machines do not appear to be affected by this problem.
---------------- bug.c ----------------
/*
Compiling broken version:
cc -o bug bug.c -lgl_s
cc -o bug bug.c -lgl
Compiling working version:
cc -DFIX -o bug bug.c -lgl_s for working version
*/
#include <gl/gl.h>
#include <sys/types.h>
#include <sys/time.h>
main()
{
short buf[512*512];
foreground();
prefposition(100,611,100,611);
winopen("Broken");
while(1) {
rectwrite(0,0,511,511, buf);
#ifdef FIX
delay(0.0001);
#endif
}
}
delay(time)
double time;
{
struct timeval tv;
tv.tv_sec = time;
tv.tv_usec = (time - tv.tv_sec) * (1E6);
select(0,0L,0L,0L,&tv);
}