[Webkit-unassigned] [Bug 106842] adding support for DiscardablePixelRef for caching lazily decoded images

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=106842





--- Comment #98 from Min Qin <qinmin at chromium.org>  2013-01-28 19:39:37 PST ---
(In reply to comment #96)
> I submitted an unreviewed build fix: http://trac.webkit.org/changeset/141033
> 
> The use SkMutex is not necessary in this code so remove it would make Mac build happy. The reason for undefined reference is because of component build and SK_API.

We definitely need the SkMutex here. If we don't provide our own mutex, skia will fall back to use a static skmutex arrray. And the skmutex array has 30 mutex in it used in a ring fashion. 
The problem is that 2 DiscardablePixelRef can later on use the same mutex and lead to deadlocks.

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