Hi Dan,
I was able to get IUP to work in a threaded environment under Windows
but not Linux (Gtk) using Script BASIC.
John
On Fri, 2018-12-28 at 01:54 -0600, Daniel G. wrote:
> 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.
>
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