[Webkit-unassigned] [Bug 123058] JSC should have an API for typed arrays

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=123058





--- Comment #8 from Geoffrey Garen <ggaren at apple.com>  2013-10-19 14:40:20 PST ---
> > JSObjectGetTypedArrayBase(JSContextRef, JSValueRef)
> > JSObjectGetTypedArrayByteLength(JSContextRef, JSValueRef)

> OK, but out of curiosity, does it have to be?  You can get a JSGenericTypedArrayView's base and length without an ExecState*.

Whenever we’ve made the decision to leave out JSContextRef before, we’ve come to regret it. For example, we made that decision for strings, and now we regret it.

In this case, I could imagine some implementations that might require an ExecState* in order to get a backing pointer. For example, if we did pin the pointer, and pinning required a GC allocation, then we would need an ExecState*. Or, if some typed arrays had a super-slow mode, in which their backing buffer pointers were maintained in an external hash table, that would require an ExecState*. Or if some typed arrays had an "I'm currently in GPU memory" mode, that would require an ExecState*.

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