I need some help from you. I think you know how to work with threads in xforms. How
can i do that? I really need this!
Hugs,
Hendrik
Mark Lee wrote:
> # To subscribers of the xforms list from Mark Lee <mlee@heartlab.rri.on.ca> :
>
> Hi Martin:
>
> I was going through the xform archives and found your article on forms and
> signals. I have a similar problem and I thought you can give some advice
> on how you got your program working.
>
> Basically I have my main form and a few sub forms which are display status
> and update buttons and input fields - all these are controlled by the
> initial call to fl_do_forms. In the program a new thread (using sproc a
> version of fork) is executed (a long computational loop) and does a few
> updates to the other forms. I have tried passing the update information
> using a direct signal call - i.e. the signal is raised everytime a update
> is needed.
>
> sigset(SIGUSR1,my_handler);
>
> Set the user signal interrupt to my_handler and raise(SIGUSR1) everytime a
> update is required. But the X-server still gives me async errors during
> updates. So the next step was to use:
>
> fl_add_signal_callback(SIGUSR1,my_handler,0);
>
> but the problem here is that, the callback does not always finish that is
> it does not return from my_handler and just hangs the program. So using
> your example I first set the signal directly
>
> sigset(SIGUSR1,pass_to_forms);
> fl_app_signal_direct(1);
> fl_add_signal_callback(SIGUSR1,my_handler,0);
>
> where
> void pass_to_forms(int signum, void *data)
> {
> fl_signal_caught(SIGUSR1);
> }
>
> but the same thing happens, my_handler does not always return and the
> program hangs.
>
> Is there a way to block the other process until the my_handler function
> is finished executing or am I missing so flags I should set in sigaction
> or sigpromask.
>
> Thanks
> Mark
>
> (I'm on a SGI machine running IRIX 5.3).
>
> __
> ________/\ \ __ Mark K. Lee "There is thin line between
> /\ __ __ \ \/\_\ mlee@irus.rri.uwo.ca Genuis and Insanity and
> \ \ \ \ \ \ \/ / / Advanced Imaging Group I'm stuck in a singularity"
> \ \ \ \ \ \_\/ / Robarts Research Institute
> \/_/\/_/\/___/ London, Ontario Canada
>
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