[OpenJDK 2D-Dev] Thread-Private RenderBuffers for RenderQueue?

Clemens Eisserer linuxhippy at gmail.com
Sat Mar 22 23:53:58 UTC 2008

Sorry for the confusion in 2. , I meant OGLRenderQueue.sync().

lg Clemens

2008/3/23, Clemens Eisserer <linuxhippy at gmail.com>:
> Hello,
>  1.) While studying RenderQueue from the STR based 2d pipelines I
>  notices synchronization happening for every command put in the queue.
>  I don't know wether tuning this is worth anything (guess not), but are
>  there cases which make thread-private RenderBuffers impossible (maybe
>  with a limit of buffers allocated)? Many threads rendering to the same
>  surface don't have any guarantees anyway when an operation is
>  performed. Or is ReentrantLock so fast that it really does not make
>  any sence worriyng about?
>  2.) I have JDK7b19, I am not completly sure wether the sync()-method
>  is 100% thread-safe, or wether this is ok in that case.
>  The field "theInstance" is written to in a synchronized-block (in
>  getInstance())  but in sync() its accassed without synchronization. It
>  may appear null (as far as I understand) in one thread while another
>  has already set it. Don't know wether this could be a problem?
>  Thanks, Clemens

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