I just upgraded my V8 version to 3.20.16 (from some very old version). I can no longer use

Handle<Object> obj /* = ... */;
Persistent<Object> p = Pe


I just upgraded my V8 version to 3.20.16 (from some very old version). I can no longer use 


to create a persistent handle to an object. The compiler suggests using static T* v8::Persistent<T>::New(v8::Isolate*, T*) [with T = v8::Object] instead. However, if I change my code to 


the compiler complains that this function is private. How do I create a Persistent<Object> handle from a normal Handle<Object> now?

I've googled and the only thing I found was that the documentations seem to contradict each other:


https://developers.google.com/v8/embed#handles says that persistent handles are now created using the Persistence constructor
http://bespin.cz/~ondras/html/classv8_1_1Persistent.html indicates that Persistence<T>::New is still the way to go


thanks for any help in advance




As @aaronman pointed out, if you are working with integers only the fastest way to do this is to have all powers of 2 in table as there are not that many. By construction, in an unsigned 32 bit integer there are 32 powers of 2 (including the number 1), in a 64 bit integer there are 64 and so on.

But if you want to do it on the fly for a generic case you can easily calculate the surrounding powers of 2 of any number. In c/c++:


        

            

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            2013-08-20T10:24:33.403