Subj : Re: gc questions (and various questions also)
To   : netscape.public.mozilla.jseng
From : Brann Joly
Date : Wed May 12 2004 11:22 pm

Thx for the quick answer, brendan :)

> JS_DefineObject is just shorthand for JS_NewObject; JS_DefineProperty.
> See the source.

What's the interest of defining an object as a property of another one? (in
both case, my getter will be called when the property will be accessed, and
I will have the possibility to return whatever i want, wont i?)
Is it only because as a property of another object, the object is rooted for
GC ?

>
> Why wouldn't you use the resolve JSClass hook instead?  Lazily creating
> on each get adds overhead to all but the first get calls that you might
> want to avoid.

Yes, i create the object prototype only once (and i keep the Jsclass
structure somewhere), but i'm creating objects only when they are needed,
since i dont want my whole Dom tree to be duplicated into memory

>
> Are these Vector objects values of properties of some other object?  If
> you are trying to follow the DOM, might they be named by id attributes,
> and fetched via document.getElementById?  But then they would want to be
> DOM Elements, not just Vectors.

You'r perfectly right, and my tree is not exactly Dom compliant (it's not
mine, and things are as they are:()
In fact, each attributes is a C++ type, and various exotic types have been
typedefed, such as vector or others
so what do you think of my solution, i rewrite it here :
 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 .

.