related to multi threaded programming

sky rulz · 04-22-2009, 01:42 AM

hi all,

i created a 3 threads and each thread just prints their thread ids.
But when one thread generates a signal (for example SIGFPE) the process terminates because signals are process wide and hence other threads are also terminate.

I want to keep the other threads running and do the job assigned to them. Is there a way to get it done?

minge.zu · 05-11-2009, 03:33 AM

call the pthread_exit() in your main function after the threads are spawned.

kpraveen455 · 05-11-2009, 06:48 AM

But pthread_exit() will exit the threads, and the question here is to allow the remaining 2 threads to be alive...

Please correct me if i am wrong

jiml8 · 05-11-2009, 10:34 AM

You need to set up a signal handler to capture the incoming signal and process it as you choose.

Though, I must say I am not at all clear on why you would want to use system signals to communicate between threads; there are much better ways.

sky rulz · 05-11-2009, 11:44 PM

Quote:

Originally Posted by kpraveen455

But pthread_exit() will exit the threads, and the question here is to allow the remaining 2 threads to be alive...

Please correct me if i am wrong

You got me correct.
i need the other threads to be alive. That is i need the signal to be delivered to the thread that was cause for it and not to the main thread. This makes the other threads alive.

sky rulz · 05-12-2009, 12:34 AM

Quote:

Originally Posted by minge.zu

call the pthread_exit() in your main function after the threads are spawned.

hi,
i did use the pthread_exit() after the threads are being spawned. But, this does not solve the problem. Because, the exit function makes sure that main thread waits for the other threads to terminate.

But, in situations like signal generation, the default action is taken if signal handler is not present. I need to terminate only the thread that caused the signal and not all