In recently, I am coding a script
wrapper<https://github.com/code4game/scriptwrapper>by Google V8. You can
reference the
sample<https://github.com/code4game/scriptwrapper/blob/master/code/src/jsv8wrapper/tutorial/tut03_cls.cpp>(tut03_cls).
I use the WeakCallback to free the memory that was allocated by c++.
Three Important Things:
1. Call `data.GetValue().Clear();` in the WeakCallback.
2. Set the object to `null` in javascript file.
3. Call `while(!v8::V8::IdleNotification()) {};` after run script.
Hope these can help you.
在 2013年10月24日星期四UTC+8下午10时36分52秒，Yorath Wang写道：
>
> Thanks a lot. But are there any ways to avoid the memory leak?
>
>
> On Thu, Oct 24, 2013 at 5:46 PM, Andreas Rossberg
> <[email protected]<javascript:>
> > wrote:
>
>> On 24 October 2013 11:20, Sven Panne <[email protected] <javascript:>>
>> wrote:
>> > On Thu, Oct 24, 2013 at 11:00 AM, Yorath Wang
>> > <[email protected]<javascript:>>
>> wrote:
>> >>
>> >> Thanks for your reply.
>> >> I use while (!v8::V8::IdleNotification()) {} force gc to release the
>> >> memory, but that callback is not called either.
>> >> Could you please show me a right way to use SetWeak to avoid memroy
>> leak?
>> >> Thanks
>> >
>> > To shorten this discussion a bit: Using weak callbacks (a.k.a.
>> finalizers)
>> > will never give you any guarantees if/when they are called, it is just
>> based
>> > on best-effort. If you really need timely destruction, you will need
>> some
>> > form of explicit API for the kind of objects you are working with.
>>
>> Right, and just to be clear: that is true for just about any
>> finalisation mechanism. Since this is such a frequent question, let me
>> reiterate two fundamental wisdoms regarding GC:
>>
>> 1. Forcing GC explicitly almost always trades bad behaviour for worse
>> behaviour.
>> 2. Finalisation almost always is the wrong solution to the wrong problem.
>>
>> And once you start violating the former just to work around the
>> consequences of violating the latter, you are definitely in the
>> non-exceptional case of either. ;)
>>
>> /Andreas
>>
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