[Webkit-unassigned] [Bug 86483] TimingFunction and TransformOperation refcounting is not thread safe

Tue Aug 14 01:32:14 PDT 2012

https://bugs.webkit.org/show_bug.cgi?id=86483

Arvid Nilsson <anilsson at rim.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|LayerAnimation is not       |TimingFunction and
                   |thread safe, which makes    |TransformOperation
                   |dereferencing an expensive  |refcounting is not thread
                   |operation                   |safe

--- Comment #14 from Arvid Nilsson <anilsson at rim.com>  2012-08-14 01:32:43 PST ---
I'm gonna remove the noise that is the BlackBerry-specific parts of the patch.

The reason the BlackBerry port uses TimingFunction and TransformOperation on multiple threads is that these classes (and subclasses) are immutable - once constructed, their data don't change.

An immutable class is typically thread safe.

The only mutable property of these classes is the refcount, which we wish to change to be thread safe (but only for the BlackBerry port).

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