Testing whether Xlib threading support works in XORG-RELEASE-1branch...

[Roland Mainz]

Christopher Blizzard wrote:
> >While I don't doubt there could be problems, you should
> >be aware in the past that Mozilla's threading itself was badly
> >broken (IIRC, at the time wasn't even actually calling Xlib's thread
> >initialization at all; this was in late Netscape days).  I
> >remember a very frustrating debugging session on the
> >phone with Keithp where we ended up having to conclude we
> >couldn't fix it (it being Netscape, without source available),
> >and that the fault was 100% Netscape's.
>
> Mozilla only does drawing from the main thread, so it's not like we're
> even pushing that code very hard.  Mozilla's threading doesn't have any
> serious issues that I know of right now.  I don't know what roland is
> seeing. 

See my other reply here... I was never talking about bugs in Mozilla, I
was interested that the X11 peopple test their Xlib and X extension
libraries against a real-world application (e.g. mozilla) with Xlib
threadsafe mode enabled to check whether this works now or not... in the
past that part of Xlib was simply unuseable since the implementation
assumed that it is safe to lock a mutex recursively. Xfree86 people did
some work on that before V4.4.0 was released and my patch for Mozilla
was mainly ([1]) to test whether the fixes are complete or whether more
work is required.

[1]=there is the idea to run plugins in a seperate thread but that
cannot be implemented in the near future (>=2 years) since the fixes
have to spread first over all Unix/Linux distributions before we can
even think to make any use of that.

----

Bye,
Roland

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