I think I would like to *copying* the Value and store the Value to a place 
that other thread can access. But I don't know how to make that kind of 
copy.
Below is my case:
I have some other thread in the addon, and I have to call some APIs on 
those thread. The parameters I'm using to call those API come from the 
javascript.
I just want to copy those parameters, for instance, copying v8:String, 
v8:Int32

Do you have any code examples on copying those value, so any other thread 
can access them at any time.

On Thursday, April 11, 2013 6:35:52 PM UTC+8, Ben Noordhuis wrote:
>
> On Thu, Apr 11, 2013 at 10:28 AM, Jerry Yin <[email protected]<javascript:>> 
> wrote: 
> > Thanks for your reply. I used locks. 
> > 
> > My question is how to share a v8::Local<v8::Value> between thread? 
>
> The short answer is: You don't, V8 is not thread safe. 
>
> The longer answer is: If you embed V8 in your application, you can use 
> the v8::Locker API to coordinate VM access between threads. YMMV may 
> vary in node.js because node.js never releases the lock. 
>
> It's not exactly clear to me what values you are sharing and why but 
> you will likely have to copy the data out of the V8 VM before you hand 
> it off to another thread (effectively unsharing it.) 
>

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