Question

Let’s say I have 10 threads running simultaneously. Is there any way of calling some method when a thread finishes? I was thinking of something like:

$thread->onFinish(sub { print "I'm done"; });

Answer 1

The question you ask in the title and the one you ask in the body are different.

The standard way for a different thread to find out if a thread is still running is to either wait for it or poll it using is_running and/or is_joinable depending on your particular needs.

If all you want is for the i'm done to be printed, well, make sure that is the last statement executed in the thread body, and it will be printed.

threads->create(sub {
    # call the actual routine that does the work
    print "i'm finished\n";
});