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From Joe Orton <...@manyfish.co.uk>
Subject Re: trylock does not work on RH 9
Date Thu, 24 Jul 2003 13:22:16 GMT
On Thu, Jul 24, 2003 at 11:51:18AM +0100, David Reid wrote:
> > On Wed, Jul 23, 2003 at 03:16:07AM +0200, apr@insode.de wrote:
> > > Hi,
> > >
> > > I am writing an Apache 2.0 module and have problems with the
> mutex_trylock
> > > functions.
> > >
> > > apr_global_mutex_lock() and apr_global_mutex_unlock() work but
> > > apr_global_mutex_trylock() segfaults the apache2 childs on my RedHat 9
> box.
> > >
> > > Any help is welcome... is this a bug or do I have to use trylock() with
> > > different arguments than lock() ?
> >
> > This is an APR bug, thanks for the report.  apr_proc_mutex_trylock will
> > always segfault in the various Unix implementations, so
> > apr_global_mutex_trylock is simply not usable yet unfortunately.
> 
> Do we know why and can it be fixed?

$ grep tryacquire locks/unix/proc_mutex.c
    NULL, /* no tryacquire */
    NULL, /* no tryacquire */
/* TODO: Add proc_mutex_proc_pthread_tryacquire(apr_proc_mutex_t *mutex)
*/
    NULL, /* no tryacquire */
    NULL, /* no tryacquire */
    NULL, /* no tryacquire */
    return mutex->meth->tryacquire(mutex);



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