[pulseaudio-discuss] [PATCH] mainloop: Run defer events in the order they are created

[Tanu Kaskinen]

On Tue, 2014-03-18 at 12:11 +0100, David Henningsson wrote:
> On 03/18/2014 09:23 AM, Tanu Kaskinen wrote:
> > module-zeroconf-publish assumes that if it creates two defer events,
> > then the one that was created first will be dispatched first. That's
> > a fair assumption in my opinion, so let's fix the ordering in
> > pa_mainloop.
> 
> Are you sure there are no modules assuming the current behaviour, and
> thus will be broken with this patch?

I don't know any good way to check that, so I'm not 100% sure. However,
I find it very unlikely that someone would expect events to be processed
in inverse order.

That said, I don't think this is the right fix for the zeroconf-publish
crash. I was going to suggest that we'd document it in pa_mainloop_api
that defer events must be dispatched in creation order, but then I
realized we have no control over existing external mainloop
implementations, so we can't safely add that new promise to the API.
I'll fix the bug in a different way (by removing all defer event
ordering assumptions from zeroconf-publish).

-- 
Tanu