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Re: [Etoile-dev] ANN: New Objective-C Runtime

From: o Kiselkov <address@hidden>
Subject: Re: [Etoile-dev] ANN: New Objective-C Runtime
Date: Thu, 08 Nov 2007 16:15:55 +0100
User-agent: Thunderbird (X11/20071022)

Hash: RIPEMD160

Sounds very cool. I'm all for a new runtime, as the GNU runtime is
seriously stone-age.

- --

David Chisnall wrote:
> Hi Everyone,
> I've spent the last two days locked in my room doing some therapeutic  
> coding[1], and the result is a new Objective-C runtime (rejection is  
> obviously good for my productivity; I should apply for more jobs).  A  
> quick summary of features:
> - Two layer model, with Self-like object model at the core and classes  
> built on top.
> - Very small code base (roughly 10% of the size of the GNU runtime)
> - Support for @synchronized on all objects / classes.
> - Support for concrete protocols / mixins.
> - Support for prototype-based object orientation (can be mixed with  
> class-based; classes really are just another kind of object in this  
> runtime)
> - Support for safe method caching (including polymorphic inline  
> caching) with low overhead.
> - Support for fast accessor methods (we can implement properties that  
> are much faster than Apple's)
> The core sparse array implementation is a bit basic and could do with  
> some tuning and, of course, it needs compiler support to actually be  
> useful.  The core runtime is tested, but the class-based part isn't  
> yet so there are probably lots of bugs there.  I plan on writing a set  
> of macros representing the basic Objective-C primitives, but so far I  
> have only done message dispatch (three version; basic, inline cache,  
> polymorphic inline cache).
> You can find a more detailed overview of the library design here:
> http://cs.swan.ac.uk/~csdavec/libobjc/libobjc.pdf
> Interface documentation:
> http://cs.swan.ac.uk/~csdavec/libobjc/libobjc.pdf
> The code is currently in a branch in the Étoilé repository:
> svn://svn.gna.org/svn/etoile/branches/libobjc_tr/
> Comments welcome, bug fixes very welcome.
> David
> [1] Well, I did eat, sleep, shower and make toffee in the middle, and  
> procrastinate a lot reading online comics too, but you get the idea.
> _______________________________________________
> Etoile-dev mailing list
> address@hidden
> https://mail.gna.org/listinfo/etoile-dev

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