Subj : Function reserved slots
To   : netscape.public.mozilla.jseng
From : Alain Frisch
Date : Thu May 19 2005 04:14 pm

Hello,

I'm new to SpiderMonkey embedding; please accept my apologies if the 
question is stupid.

I want to define a new native function and attach some custom data to 
its associated object, to be used within the C callback. I've read that 
the object associated to a function has two reserved slots which can be 
used for this purpose.

Here is what I do to create the function:

JSFunction *func;
func = JS_DefineFunction(cx, globalObj, "trampoline", trampoline, 3, 0);
JS_SetReservedSlot(cx,JS_GetFunctionObject(func),0,INT_TO_JSVAL(1000));


In the trampoline function, I'm trying to acces the reserved slot:

jsval v;
ok = JS_GetReservedSlot(cx,obj,0,&v);


This last call fails. What did I do wrong?


Thanks.


-- Alain Frisch

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