On Mon, Jan 18, 2021 at 5:28 AM Vinayaka Kamath <
vinayaka.kam...@couchbase.com> wrote:
> Hello All,
>
> I am trying to return a weak persistent handle to JS through a function
> template. However the v8 is crashing on triggering the codepath. What is
> the correct way to do it?
> My intention is to trigger GC on the persistent handle when it goes out of
> scope.
>
> _____________________________________
> *My Function Template:*
>
> void QueryFunction(const v8::FunctionCallbackInfo<v8::Value> &args) {
> // This function is made available as Query() in the JS code
> .
> .
> auto wrapper = new Query::WrapStop(isolate, iterator,
> it_info.iterable);
> args.GetReturnValue().Set(wrapper->value); *// How to return this??
> Set requires a pointer to Persistent*
>
args.GetReturnValue().Set(wrapper->value.Get(Isolate)); *// return a
reference to the persistent object.*
> // The intention is to force GC on wrapper->value when it goes out of
> scope in JS
> }
> ________________________________________
> *Definition of WrapStop*
>
> struct WrapStop {
> explicit WrapStop(v8::Isolate *, Query::Iterator *,
> v8::Local<v8::Value>);
> virtual ~WrapStop();
> v8::Persistent<v8::Value> value; // Force GC on this handle when
> it goes out of scope
> Query::Iterator *iterator;
> static void Callback(const v8::WeakCallbackInfo<WrapStop> &); //
> Callback triggered on GC
> };
> ________________________________________
> *Constructor for WrapStop*
>
> Query::WrapStop::WrapStop(v8::Isolate *isolate, Query::Iterator *iter,
> v8::Local<v8::Value> val) : value(isolate, val), iterator(iter) {
> value.SetWeak(this, Query::WrapStop::Callback,
> v8::WeakCallbackType::kParameter);
> // Set value as weak to force GC
> }
>
>
>
> --
> --
> v8-users mailing list
> v8-users@googlegroups.com
> http://groups.google.com/group/v8-users
> ---
> You received this message because you are subscribed to the Google Groups
> "v8-users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to v8-users+unsubscr...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/v8-users/490983ae-fd94-4b3e-aa4b-0b4ff8e0c23dn%40googlegroups.com
> <https://groups.google.com/d/msgid/v8-users/490983ae-fd94-4b3e-aa4b-0b4ff8e0c23dn%40googlegroups.com?utm_medium=email&utm_source=footer>
> .
>
--
--
v8-users mailing list
v8-users@googlegroups.com
http://groups.google.com/group/v8-users
---
You received this message because you are subscribed to the Google Groups
"v8-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to v8-users+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/v8-users/CAA2GJqUBTkrXjRettWUSk7mtfKzqxhufdk9wjHdf%3DQi3%3D%3DkgDw%40mail.gmail.com.
