[OpenJDK 2D-Dev] Question regarding surface locking

Roman Kennke roman at kennke.org
Tue Mar 24 20:22:28 UTC 2009

Yeah right, I just answered this myself after I wrote it. At least for
XPixmaps this makes sense. Could be optimized for Shm and DGA I suppose,
but that would complicate stuff (even more), unless the implementation
gets split up in XPixmapSurfaceData, ShmSurfaceData and DGASurfaceData
or so.


 Am Dienstag, den 24.03.2009, 16:13 -0400 schrieb Clemens Eisserer:
> Hi Roman,
> > Is it really necessary to lock on a global lock, wouldn't a
> > lock on the surface do the same job? I'm thinking when you have
> > animations on several surfaces in parallel (like in the Java2Demo), it
> > might be more efficient to have a finer grained lock. Or are there other
> > pitfalls attached here?
> I am not really sure, but as far as I know the global lock also
> protects libX11 from concurrent access.
> - Clemens

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