threads::question: where is the threads->cancel() call?

turo has asked for the wisdom of the Perl Monks concerning the following question:

Hi Monks, i have a question for the annals of our monastery library.

Posix threads (defined at <pthread.h>) has a list of standard calls:

pthread_create
pthread_exit
pthread_join
pthread_detach
...
pthread_cancel

Seems that Perl thread implementation only has the most useful calls; but, where is the pthread_cancel? ... how can I cancel the execution of a thread which is running from another thread? ... Is this possible?

I search on perlthrtut, the threads man pages, the pm::ssearch, even i didn't find it on the camel book ... somebody knows any form to cancel the execution of a thread? ...

thanks :)

perl -Te 'print map { chr((ord)-((10,20,2,7)[$i++])) } split //,"turo"'

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Re: threads::question: where is the threads->cancel() call? by zentara (Cardinal) on Feb 15, 2006 at 13:40 UTC
I don't know about how pthreads.h fits into this, but if you want to cancel the execution of a thread, 1 way is to use a shared variable, and when the thread sees that shared variable set to it's cancel value, then "return" in the thread ( and join if not a detached thread). Maybe the pthread_cancel is used to abruptly terminate a thread, like when an 'exit' or 'exec' is called from some other sibling thread. I'm not really a human, but I play one on earth. flash japh	[reply]
Re^2: threads::question: where is the threads->cancel() call? by turo (Friar) on Feb 15, 2006 at 15:02 UTC
yes, pthread_cancel, is like 'use the force' with any thread you've launched ... :-) ... The scheme of changing a shared variable, doesn't help all the times ... `perl -Te 'print map { chr((ord)-((10,20,2,7)[$i++])) } split //,"turo"'`	[reply] [d/l]
Re: threads::question: where is the threads->cancel() call? by Anonymous Monk on Feb 16, 2006 at 09:02 UTC
Perl threads aren't posix threads	[reply]
Re^2: threads::question: where is the threads->cancel() call? by turo (Friar) on Feb 16, 2006 at 11:08 UTC
I know that, (perl is supported over windows too) Even in that case, perl was born on a unix environment, and I can't believe we can't force a thread to finalize from another thread... turo `perl -Te 'print map { chr((ord)-((10,20,2,7)[$i++])) } split //,"turo"'`	[reply] [d/l]