Non-blocking pthread_join

Question

I\'m coding the shutdown of a multithreaded server.If everything goes as it should all the threads exit by their own, but there\'s a small chance that a thread gets stuck.In

Answer 1

If you're developing for QNX, you can use pthread_timedjoin() function.

Otherwise, you can create a separate thread that will perform pthread_join() and alert the parent thread, by signalling a semaphore for example, that the child thread completes. This separate thread can return what is gets from pthread_join() to let the parent thread determine not only when the child completes but also what value it returns.

Answer 2

You could push a byte into a pipe opened as non-blocking to signal to the other thread when its done, then use a non-blocking read to check the status of the pipe.