Re: ObjectiveC accessors

[Marcel Weiher]

On 31 May 2004, at 15:33, Helge Hess wrote:

> On May 31, 2004, at 15:48, Marcel Weiher wrote:
> > On 31 May 2004, at 13:38, Helge Hess wrote:
> > > I agree that this is not necessarily a good idea ;-), but notably 
> > > Boehm-GC can be used as a drop-in replacement for the malloc library 
> > > (without altering semantics!)
> > No.  It definitely alters semantics, because programs with "hidden" 
> > pointers will cease to function properly.  These are legal C 
> > programs, so by making them non-functional, you have altered 
> > semantics.
>
> Incorrect. As mentioned it can be configured as a drop-in replacement 
> which is 100% compatible to legal C programs. Hidden pointers will 
> work with malloc_uncollectable (which will be used in replacement 
> mode), but will properly expose the malloced sections for GC scanning 
> on objects that use GC-malloc.

If you use 2 different mallocs, then it's obviously not a drop in 
replacement.

> So, just one of the misinformations floating around about Boehm-GC ;-)

Yes, indeed.

>  There are certainly issues with it, but actually it is pretty well 
> thought out and provides a lot of options.

Sure.  It just isn't semantically compatible, and cannot be.

Marcel


--
Marcel Weiher                           Metaobject Software Technologies
address@hidden          www.metaobject.com
Metaprogramming for the Graphic Arts.   HOM, IDEAs, MetaAd etc.
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