So, coming back to this, is there a way to cast/convert/wrap a local
template (function or object) into a v8::Value?
I am thinking about hiding them inside an internal field so I could do:
context->global()->GetFunction("constructor")->GetInternalField(X).
how safe would it be to cast them to a void* and wrapping them inside a
v8::External?
On Sunday, October 11, 2020 at 11:40:27 AM UTC-6 Rodrigo Hernandez wrote:
> Thanks Ben, I see how those are less optimal, I was hoping for something
> along the lines of context->global()->GetFunctionTemplate("constructor"),
> or something along those lines.
> The only problem I have with my approach is that I need a Finalize
> function on each wrapped class that pretty much just resets the permanent
> handles.
>
> Thanks Again!
> On Sunday, October 11, 2020 at 1:49:10 AM UTC-6 Ben Noordhuis wrote:
>
>> On Sat, Oct 10, 2020 at 10:44 PM Rodrigo Hernandez
>> <kwizatz.ae...@gmail.com> wrote:
>> >
>> > Hello,
>> >
>> > So, suppose I am wrapping a C++ class around a JS constructor, I've
>> already created and initialized the isolate, created and initialized a
>> context, I have the FunctionTemplate for the constructor and I have
>> instantiated the function and I can call it from Js as x() or new X(),
>> > all this is fine, the function template context is finished and the
>> handle lost.
>> >
>> > But then I want to create another wrapped object for a class that
>> inherits from the first one.
>> > Is there a way to retrieve the base class FunctionTemplate so in the
>> child class I can call child->Inherit(base)?
>> >
>> > Is there another way of doing this?
>> >
>> > Right now I am keeping a C++ unordered_map of isolate to persistent
>> handle to function templates, and that works, but is that the only option?
>> >
>> > Thanks!
>>
>> It's not the only option but it's a pretty good solution. Less optimal
>> solutions:
>>
>> - store them in the snapshot with SnapshotCreator::AddData() (but you
>> can only retrieve it once)
>> - scan the heap for them with Isolate::VisitHandlesWithClassIds().
>>
>> No doubt there are more ways to stow them away somewhere.
>>
>
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