Re: Lockup

[Jan Djärv]

YAMAMOTO Mitsuharu skrev:
> > > > > > On Fri, 11 Aug 2006 08:36:39 +0200, Jan Djärv <address@hidden> said:
>
>
> > I agree with your assumtion that the lockuo occurs because the
> > signal handler and the interrupted therad are calling
> > pthread_mutex_(un)lock for the same mutex.  But BLOCK_INPUT does not
> > help, because Gnome code does not have it.
>
> That's not a problem because Gnome threads (non-main threads) never
> execute pthread_mutex_(un)lock in the signal hander context.

That does not help, the main thread executes in signal handler context 
sometimes.  And in that case, both the Gnome thread and the signal handler may 
be executing (un)lock_mutex on the same mutex.  There is no way around that, 
except not doing (un)lock in the signal handler and block the signal in the 
Gnome threads.

Now if you can guarantee that it is only the case where the thread interrupted 
and the signal handler executes (un)lock on the same mutex that cause lockup, 
that would be another thing.

        Jan D.