Subj : Re: How to distinguish objects of the same type in C?
To   : netscape.public.mozilla.jseng
From : Peter Wilson
Date : Thu Aug 11 2005 06:41 pm

Yep - I do. Sorry C++ head plugged in when I wrote that!

Pete

Weiyang Zhou wrote:
> When you say destructor, you mean the finalize function, right?
> 
> 
> "Peter Wilson" <petew@yellowhawk.co.uk> wrote in message 
> news:ddett0$jv2@ripley.netscape.com...
>> Weiyang Zhou wrote:
>>> Hi,
>>>
>>> If I use JS_initClass to define a class Foo, the contructor will allocate 
>>> some instance data in C for the object created. I also use 
>>> JS_DefineFunction to define a function called fooOp(). Assuming the C 
>>> implementation of this function is fooOp_native().
>>>
>>> With the following JavaScript:
>>>
>>> f1 = new Foo();
>>> f2 = new Foo();
>>>
>>> fooOp(f1, f2);
>>>
>>> In fooOp_native(), I will need to retrieve the instance data from each 
>>> object. How should I do that?
>>>
>>> I have read jsdate.c, seems it uses OBJ_SET_SLOT/OBJ_GET_SLOT, but it is 
>>> not in jsapi.h. Or should I use JS_SetPrivate/JS_GetPrivate?
>>>
>>> Thank you
>>> Weiyang
>>>
>> I use JS_SetPrivate/JS_GetPrivate for a number of native classes - does
>> everything I need. I also hook into the destructor to make sure I release
>> private data when the JS equiv is garbage collected.
>>
>> Pete
>> --
>> Peter Wilson. http://www.whitebeam.org, http://www.yellowhawk.co.uk 
> 
>

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