# To subscribers of the xforms list from eddie <eddie@brandeis.edu> :
I have an application which was running for quite some time without
calling XInitThreads, until under high load I would get the Xlib async
error, which after some research, I found had to do with threads.
So I added XInitThreads() before I create the thread that runs this
entire application, but now the program, without the application
actually beginning to send data to these forms, 'hangs' at the main loop:
do {
FLOBJECT* obj = fl_check_forms();
usleep(80000);
} while (obj != _quitBut && _stop != 1);
gdb shows it stuck inside fl_check_forms: here is a backtrace:
gdb) where
#0 0x40706568 in sigsuspend () from /lib/i686/libc.so.6
#1 0x40025478 in __pthread_wait_for_restart_signal () from
/lib/i686/libpthread.so.0
#2 0x40026e40 in __pthread_alt_lock () from /lib/i686/libpthread.so.0
#3 0x40023d07 in pthread_mutex_lock () from /lib/i686/libpthread.so.0
#4 0x40571d2a in _XUnregisterFilter () from /usr/X11R6/lib/libX11.so.6
#5 0x4054b28c in XQueryExtension () from /usr/X11R6/lib/libX11.so.6
#6 0x4054190b in XInitExtension () from /usr/X11R6/lib/libX11.so.6
#7 0x405820c8 in XkbUseExtension () from /usr/X11R6/lib/libX11.so.6
#8 0x40579675 in XRefreshKeyboardMapping () from /usr/X11R6/lib/libX11.so.6
#9 0x40578f19 in XkbLookupKeySym () from /usr/X11R6/lib/libX11.so.6
#10 0x40579b36 in XLookupString () from /usr/X11R6/lib/libX11.so.6
#11 0x59a79a1e in _XimLocalFilter () from
/usr/X11R6/lib/X11/locale/lib/common/ximcp.so.2
#12 0x405715c5 in XFilterEvent () from /usr/X11R6/lib/libX11.so.6
#13 0x404aca00 in fl_adjust_form_size () from /usr/X11R6/lib/libforms.so.1
#14 0x404b0d1c in fl_restore_target () from /usr/X11R6/lib/libforms.so.1
#15 0x404afbf6 in fl_restore_target () from /usr/X11R6/lib/libforms.so.1
#16 0x404ae01c in fl_check_forms () from /usr/X11R6/lib/libforms.so.1
Removing the XInitThreads() obviously doesn't show this -- is there a
reason why? Do I have a mistake in my event processing loop?
BTW, the application opens a bunch of FL_NORMAL_BROWSER objects that
display data. Sometimes we are really rapidly adding lines and changing
lines into each of these browsers.
Thank you,
- Eddie
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