[Question] How to properly store constructor for later use?

[neko-para]

I have some functions that would create an instance of my exported class, thus I need to get the ctor of it. I've tried to store it inside the context opaque, but this would cause object leak, as there's no callback to release the opaque itself (thus ctor got leak together). I've checked the samples, but point.c doesn't provide a function to create a point instance directly. I believe storing ctor to globalObject could solve this problem, but I don't want to pollute it.

[bnoordhuis]

Create a new class with JS_NewClass() and give it gc_mark and finalizer functions, see JSClassDef. Mark the constructor in gc_mark (lets the GC know it's there) and JS_FreeValueRT it in the finalizer.

[neko-para]

Then I shall still create an object with that class to track all the ctors?

[bnoordhuis]

If you have many, yes. If there's only one, just store it on the side in a global variable, for example. Just remember to free it before destroying the context and runtime.