I think using threads is the right solution here. But be careful with those
points :-it's recommanded not to alloc memory inside the threads routine. It's
betterave allocating before threads runs. -if sole variables are acessed on
both threads at the same Time, it may crash. Then you should use mutexes to
lock data accessing.
Hope it Can HellpJohann
Le vendredi 28 décembre 2018 à 10:43:26 UTC+1, John Spikowski
<supp...@scriptbasic.org> a écrit :
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
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