Hi,
Sorry I don't have any example with threads to send you.
If your long processing is open, I mean, if you can insert a function
call inside the processing loop, then you can call IupLoopStep from inside
the loop to turn the user interface responsive while processing. In this
case no threads will be necessary.
Best,
Scuri
Em sex, 28 de dez de 2018 05:55, Daniel G. <danigaritaro...@gmail.com
escreveu:
> I have a program with a button that calls a function that can take some
> time to finish (up to 10 seconds). I need the main thread to not be blocked
> while this function finish so that the GUI remain responsive. I thought I
> could use threads since even though IUP is not thread safe, I didn’t need
> to update the interface from within the worker function.
> I have near cero experience with multi-thread libraries but I tried with
> pthread. So I created a new thread from the callback, this second thread
> would run the worker function, then I detach the thread so that the
> callback function can reach the return point while the second thread
> continues, this would in theory allow IUP to continue his main loop while
> the worker function did his thing on a second thread. Something like this:
>
> pthread_t thread_id;
> int btn_cb(Ihandle *self) {
> pthread_create(&thread_id, NULL, worker_function, NULL);
> int pthread_detach(thread_id);
> return IUP_DEFAULT;
> }
>
> The problem is when I run this I get a segfault as soon as the callback
> function reach the return point while the second thread is still going. But
> before anything else, I want to ask this:
> Is my approach with pthread even close to correct for what I am trying to
> accomplish? Should I be using threads for something like this?
>
> I’ve also tried with fork and I manage to get the worker function to
> execute while having a responsive GUI, but I think would rather avoid
> processes and the more complex methods of communication it implies, like
> IPC servers or FIFO.
>
> I would really appreciate if anyone can help me with this for my amateur
> project.
> _______________________________________________
> Iup-users mailing list
> Iup-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/iup-users
>
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