[Fontconfig] Race condition on updating cache

[Akira TAGOH]

There seems another situation that corrupts the cache:
  https://bugzilla.redhat.com/show_bug.cgi?id=921706

Even re-scanning directories seems not help in some cases. strange.
I have no idea at this moment to get a fix of this issue. I'll look
into it more though.

On Wed, Oct 2, 2013 at 4:18 PM, Akira TAGOH <akira at tagoh.org> wrote:
> On Wed, Oct 2, 2013 at 4:07 AM, Akira TAGOH <akira at tagoh.org> wrote:
>> Right. that said I suppose it may be useful only when it is the
>> singleton process, in fact this issue happened with sleep one second.
>> at least waiting for one sec just before exiting didn't help. it might
>> be better moving between reading the directory and writing the cache
>> perhaps. so it might catches up updates on reading caches. let me try
>> that later.
>
> That also works but we need to support the parallel updates on
> fc-cache by threading then. otherwise it's quite stressful to wait
> for. but it may takes more time if the directory structure where is
> updating is too deep, because there are no way to know how many sub
> directories it contains until a cache is updated. so just updating
> twice seems realistic at this moment. this may be a todo task for
> future improvement.
>
> --
> Akira TAGOH



-- 
Akira TAGOH