Subj : Re: Getting function name with generic function call hook
To   : netscape.public.mozilla.jseng
From : Brendan Eich <brendan@meer.net>
Date : Tue Oct 28 2003 10:58 am

Sterling Bates wrote:

> After some searching I think I'm clueing in on what the private attribute
> is.  If I understand it right, instead of setting a property (say "__addr")
> of a JSObject pointing to a memory address, I could simply
> JS_SetPrivate(cx,obj,Pointer(self)), and whenever I see a JSObject*, I can
> use JS_GetPrivate to retrieve a pointer to the Delphi class instance. 

See also JS_GetInstancePrivate and JS_InstanceOf.  You don't want to 
assume that an obj parameter to a native function is an instance of a 
particular class.  You don't want to assume all instances have non-null 
private data, either -- unless you always set non-null private, even for 
the unconstructed class prototype created and returned by JS_InitClass.

/be

.