[Xcb] XCloseDisplay hooks

[Peter Harris]

On 2010-06-04 10:43, Julien Danjou wrote:
> I've looked in the list archive, but cannot find which solution cairo
> finally used to replace the XAddExtension mechanism from Xlib (cf the
> thread[1] from October 2009)
> 
> I'm currently trying to port libXcursor to XCB, and I'd need this
> also. :-|

I'd like to see something like this for xcb/util/atom, too. Without it,
we can't add the sane/obvious asynchronous interface: xcb_atom_prefetch.

I tried writing a generic connection-private helper for xcb/util that
could be used by xcb/util/atom, xcb/util/render, cairo, etc, but I got
bogged down in the locking needed to make it thread safe.

Peter Harris
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