Subj : Re: using  js_HashString in a getter callback
To   : netscape.public.mozilla.jseng
From : Brann Joly
Date : Wed May 26 2004 11:52 am

I understand, but why should i use the reserved slots rather than the
private slot? (I only need one pointer)

"Sterling Bates" <whoelse@sterlingbates.com> a écrit dans le message de
news:c8vs6o$s8e2@ripley.netscape.com...
> Brann Joly wrote:
>
> >>Don't you mean JS_SetReservedSlot, not JS_SetPrivate, here?
> >
> > I meant JS_SetPrivate, but of course I may be wrong. What I want is to
> > attach some data to a function object, so I can get it back when my
callback
> > is called by SM. Since I use JS_SetPrivate to attach private data to
> > objects, i thought it was a good idea to use it for functions too.
What's
> > the difference between the 2 functions? I can't find JS_SetReservedSlot
in
> > the apidoc
>
> In JSClass.reserveSlots you can set up to 255 reserved slots.  While
> there are other reserved slots for the engine internals, you can
> reference the slots from 0..n-1.
>
> Here's the signature for JS_SetReservedSlot:
>
> JSBool JS_SetReservedSlot(JSContext *cx, JSObject *obj, uint32 index,
> jsval v);
>
> And the signature for JS_GetReservedSlot:
>
> JSBool JS_GetReservedSlot(JSContext *cx, JSObject *obj, uint32 index,
> jsval *vp);
>
> Sterling

.