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Date: Sun, 17 Nov 2002 22:26:00 -0000
From: pankaj bathwal <pbathwal@yahoo.com>
Subject: Re: pthread_cancel doesn't work
To: ssundaragopalan@hss.hns.com
Cc: pthreads-win32@sources.redhat.com
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Thanks Srikanth

Are there any system define cancellation points like
sleep, pthread_cond_wait, read, write etc
When did thread actually get cancelled???
When a running thread encounter a cancellation point
after pthread_cancel is called???
Or if a thread gets cancel when we are in system a
system define canecllation point??

Thanks again....

Regards
Pankaj

--- ssundaragopalan@hss.hns.com wrote:
> 
> 
> Hi pankaj,
>      In Windows, threads get cancelled only in
> CANCELLATION POINTS.
> So you *cannot* expect your thread to get cancelled
> as soon as you cancel
> the thread
> by calling pthread_cancel. So,unless it comes across
> a cancellation point
> it wont get cancelled.
> 
> I suggest you to do a explicit pthread_testcancel()
> in your thread which is
> a defined cancelleation point
> and the thread will relinquish when it encounters
> this.
> 
> some possible scenarios where a thread might not get
> cancelled are
> > Listening in a socket
> > waiting for a user input from console(getchar())
> 
> regds,
> srikanth
> 
> 
> 
> 
> 
> 
> pankaj bathwal <pbathwal@yahoo.com> on 11/16/2002
> 11:17:31 AM
> 
> To:   pthreads-win32@sources.redhat.com
> cc:    (bcc: Srikanth Sundaragopalan/HSSBLR)
> 
> Subject:  pthread_cancel doesn't work
> 
> 
> 
> 
> Hi,
> I am trying to cancel a running thread.
> I an using "pthread_cancel" function.
> I have set cancel state as PTHREAD_CANCEL_ENABLE
> using
> function "pthread_setcancelstate" but execution of
> my
> thread does not stop.
> what's wrong??
> Do I have to something more??
> Can I have a sample code??
> 
> Thanks
> Pankaj
> 
> 
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