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From "Geir Magnusson Jr." <ge...@apache.org>
Subject Re: Against using Java to implement Java (Was: Java)
Date Wed, 18 May 2005 22:23:43 GMT
Or post to the dev list first so everyone can see it, and then take a  
summary to the wiki.

On May 18, 2005, at 2:43 PM, Davanum Srinivas wrote:

> Weldon,
> One way to handle this is to write something up on the wiki
> (http://wiki.apache.org/harmony/) and ask people to comment and then
> incorporate the comments back. So that we have a record of the
> discussion and the conclusions. Yes, we need to stick to harmony-dev
> for now.
> Thanks,
> dims
> On 5/18/05, Weldon Washburn <weldonwjw@gmail.com> wrote:
>> On 17 May 2005 18:27:42 -0600, Tom Tromey <tromey@redhat.com> wrote:
>>>>>>>> "David" == David Griffiths <david.griffiths@gmail.com>
>>> David> Maybe a concrete example would help. Let's say you have a  
>>> GC module
>>> David> written in C. One of it's API calls is to allocate a new  
>>> object. How
>>> David> is your JIT module going to produce code to use that API?  
>>> Via a C
>>> David> function pointer?
>>> Yes.
>>> One way is to mandate link- or compile-time pluggability only.  Then
>>> this can be done by name.  Your JIT just references
>>> '&harmony_allocate_object' in its source and uses this pointer
>>> in the code it generates.
>>> The other way is to have the JIT call some central function to get a
>>> pointer to the allocator function (or functions, in libgcj it turned
>>> out to be useful to have several).  This only needs to be done once,
>>> at startup.
>>> For folks interested in pluggability, I advise downloading a copy of
>>> ORP and reading through it.  ORP already solved these problems in a
>>> fairly reasonable way.
>> Thanks.  I am more than willing to respond to questions about ORP.
>> Since ORP was last posted to open source, I have done some additional
>> thinking about interfaces as well as JVM and .NET design in general.
>> I really look forward to discussing these ideas.  It would be  
>> great if
>> we can quickly get to the point where we can discuss interface
>> details.  For example, I would like to start a detailed discussion on
>> JIT and GC interface header files.  Should we start this on the
>> general harmony-dev list?
>>     Weldon
>>> Tom
> -- 
> Davanum Srinivas - http://webservices.apache.org/~dims/

Geir Magnusson Jr                                  +1-203-665-6437

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