Subj : gc questions (and various questions also)
To   : netscape.public.mozilla.jseng
From : Brann Joly
Date : Wed May 12 2004 09:06 pm


the JS_CompileFunction has a Jsobject * param, described like this : "Object
with which the function is associated."
I assume it isn't the "this" object, because this one is specified in
Js_CallFunction, so what is this association? Is it just a GC thing (so that
my function object will not be garbage collected, because it is attached to
the global object for instance), or am i missing someting (i guess i am)

Also, I'm wondering what's the difference between Js_DefineObject and
Js_NewObject.
let's say A is a JsObject with a property named "a", which is a jsObject (i
mean which should return an object when u access A.a) . What's the
difference between defining the object as a property of A with
DefineProperty, and creating one, since my getter will be called in both
case, and will have to return the object.
Again, is it just GC related or is it deeper than that?

I wonder if I understand correctly the concept of property. In my model,
only one object is created and set as a root (this object is the Document
element of a Dom tree), and when a user wants to access a property of this
object, my getter is called, creates the object if it doesnt exist in
javascript yet, and return the adress of this object.  Is it the normal way
to go?

Since some of my Dom objects are containing attributes of types not
supported by javascript (Vector for example), how should i do? I thought
that i could create an object with 3 properties (x, y, z) and a private tag
to my  vector in dom, with a specialized getter returning the ints to
spidermonkey if the user tries to access x, y or z . Is it a good idea, or
is there a better way to do that?

Thanks :)

Brann

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