topic Re: how to determine thread status from different thread in Operating System - HP-UX

how to determine thread status from different thread

Ken_109 — Mon, 15 Mar 2004 19:28:42 GMT

I am considering building a "monitoring thread" that will have a list of detached running threads. How can I test if these running, but detached threads are still executing? I don't wish to use pthread_join, as this will block. Any ideas?Thanks.

Re: how to determine thread status from different thread

Paddy_1 — Tue, 16 Mar 2004 16:17:57 GMT

Te options I know of :
(a)Use DCE threads by using libcma.sl and not use pthreads
(b) Use the multithreaded unsupported lib written for this purpose
http://ftp.x.org/pub/unsupported/lib/pcthreads/
(c)Use certain mechanisms in Java to achieve the same

Re: how to determine thread status from different thread

Mike Stroyan — Thu, 18 Mar 2004 12:18:29 GMT

If those monitored threads are cooperating, you could add a cancellation cleanup handler to each thread with pthread_cleanup_push(). Then your monitoring thread could just look at a data structure that is updated by the cancellation handler of each thread.

Re: how to determine thread status from different thread

Ken_109 — Thu, 18 Mar 2004 16:36:51 GMT

Thanks for the above suggestions:I figured out an interesting technique use pthread_getschedparam. This takes the thread id.. If the thread is not found it returns ESRCH error. I created a subroutine around this to check the thread status (ie, running,,, or ESRCH not running )...