switching the server to poll/epoll

[Keith Packard]

Adam Jackson <ajax at redhat.com> writes:

> Okay, that makes sense. I'm still a little wary of it, because I don't
> trust myself to remember the BlockHandler wrapping order and therefore
> worry that actions triggered in ephyrXcbHandleEvent might not be safe
> to do while we're halfway unwound. (eg, would an expose event trigger
> some drawing that wouldn't flush through promptly because shadow has
> already synced with the screen in its BlockHandler.)

yeah, everything but configure notify would be fine; even expose events
are fine -- they go through the same path as damage, which works. But,
configure seems scary, so I just fixed it. Could also just pend the
configure notify event for later processing, but I didn't see any
benefit in making it more complicated.

> One possibility might be:
>
>     if (xcb_peek_queued_event(conn) != 0)
>         AdjustWaitForDelay(timeout, 0);

That's effectively what I did, by adding a single-event queue inside
ephyr to hold any fetched event. Patches on the list; I even managed to
get ephyr resize working with glamor now.

-- 
-keith
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