Subj : Re: Killing threads
To   : comp.programming.threads
From : steve
Date : Wed Aug 17 2005 12:13 am

In article <43026977.3060905@Lucent.com>,
Srini Palthepu  <psrini@Lucent.com> wrote:
>
>>>My application has a set of daemon threads for doing the work
>>>that are alocated for each client request. But when a thread hangs in
>>>the proces of serving a client for any reason, I need to cleanup.
>>>I am trying to kill the hung thread and respawn a new one as a way
>>>of cleaning up.
>> 
>> 
>> This is a thread pool?
>
>yes.
>
>
>> Why not add the logic to the threads to detect a timed out condition and clean 
>> up after themselves?
>> 
>
>How do a thread that is blocked doing the work
>detect timeout? In my case, the main thread gets a
>reset request from client upon timeout.
>May be I can send an interrup signal instead of
>SIGKILL to the thread.

You apparently missed my subtle hint.  There is a mechanism, known an cancellation,
that probably does what you want.  But be warned that it's remarkably challenging
to use cancellation correctly, and a lot of third-party libraries don't handle it
correctly.

man pthread_cancel
-- 
Steve Watt KD6GGD  PP-ASEL-IA          ICBM: 121W 56' 57.8" / 37N 20' 14.9"
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.