Hi Benny,
On 18 Aug 2008, at 17:34, Benny Prijono wrote:
> On Mon, Aug 18, 2008 at 3:52 PM, Ruud Klaver <ruud at ag-projects.com>
> wrote:
> Hi,
>
> On 18 Aug 2008, at 13:56, Benny Prijono wrote:
>
> > On Mon, Aug 18, 2008 at 11:23 AM, Ruud Klaver <ruud at ag-projects.com>
> > wrote:
> > Hi,
> >
> > I'm running into an issue in the following situation (sorry about
> the
> > lack of code):
> >
> > 1. I do pjmedia_endpoint_create with 0 threads, giving it the
> ioqueue
> > from my pjsip_enpoint using pjsip_endpt_get_ioqueue
> > 2. I have a worker thread that does pjsip_endpt_handle_events in a
> > loop
> > 3. I call pjmedia_transport_udp_create to create a RTP/RTCP over UDP
> > port pair
> > 4. I destroy the UDP transport using pjmedia_transport_close
> > 5. pjsip_endpt_handle_events returns the ETIMEDOUT ("Operation timed
> > out") system error.
> >
> > On Linux this problem does not occur, it seems to be OS X specific.
> > Maybe it has something to do with the bug discussed in this
> thread: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/2008-April/002531.html
> >
> >
> > That looks plausible, you can try the patch mentioned in that thread
> > to see if that fixes it. Or otherwise get the latest version. ;-)
> >
> > Cheers
> > Benny
> >
> >
> > Any idea what's going on here?
> >
> > Ruud Klaver
> > AG Projects
> >
>
> Sorry, I probably should have mentioned I am using the code from SVN,
> so this patch is already included.
>
>
> Yes it should have been included. I'm not sure now what might have
> caused this, but one possible reason is select() returns -1 and
> errno is set to ETIMEDOUT. If this is a temporal error then perhaps
> we can ignore it.
>
> -benny
You were right about the select() failing. I have traced the sequence
of events to the following:
1. select() returns -1 and errno is set to EBADF (Bad file descriptor).
2. pj_ioqueue_poll returns this errno value in pj style and negative
(-120009)
3. in pjsip_endpt_handle_events2 errno is queried again (through
pj_get_netos_error()) and somehow has been changed to ETIMEDOUT in the
meantime.
What I am doing is having pj_ioqueue_unregister() called from a
different thread than the select() is active in. This seems to confuse
the select().
How is this supposed to work, since ioqueue->lock is released around
the select() statement?
Ruud Klaver
AG Projects
