[elephant-devel] Re: elephant on ACL 6.2 using BDB

[Robert L. Read]

Thanks!  Of course, I modified it to do the SQL back end stuff; it is 
probably my modification which is non-portable, but perhaps you can
very quickly fix the problem.

On Thu, 2005-12-22 at 15:59 -0600, Andrew Blumberg wrote:

> hi robert,
> 
>  	i wrote most of the MOP code originally, so i'll see if i can 
> debug this.  i probably won't start looking at this until the weekend, but 
> i'll write updates as soon as i get going.
> 
>  								- andrew
> 
> On Thu, 22 Dec 2005, Robert L. Read wrote:
> 
> > Deare Elephant Users and Developers,
> >    Andrew Philpot has discovered a major bug in the 0.3.0 version of
> > Elephant used on Allegro.
> > As his (attached) debugging code shows, there is apparently a difference
> > in the way Allegro and SBCL
> > behave in terms of the MOP.
> >
> >    This means that at present, 0.3.0 doesn't work with Allegro and
> > there is no simple workaround.
> > I can't work on this much until after X-mas.  Fixing this is the highest
> > priority for the project,
> > in my opinion; I will work on it then.  However, I don't have a copy of
> > Allegro and don't have
> > much experience with the MOP.  If someone knows why Allegro "unsets" the
> > slot values after
> > they have been set and knows how to fix it, please tell me.
> >
> >    I will eventually solve this problem but it would be even better if
> > a user could submit a patch
> > for me.
> >
> >    Many thanks to Andrew for solving this problem; I will update the
> > project home page
> > to reflect this today.
> >    As far as I know, 0.2.0 continues to work with Allegro.
> >
> >
> >
> > On Wed, 2005-12-21 at 17:44 -0800, Andrew Philpot wrote:
> >
> >> I agree that it seems to be some kind of ACL MOP difference.
> >>
> >> I metered various bits of initialization code I could find to see who
> >> is setting slot DBCONNECTION-SPEC-PST of the persistent object.
> >>
> >> It looks like it gets set by all the specializations and then unset by
> >> STANDARD-OBJECT's INITIALIZE-INSTANCE method.  I can't test that
> >> directly, since I can't advice or specialize that CL-provided method.
> >> If this is indeed what is happening, I think you will have an idea of
> >> what to do, or perhaps we can formulate a question to Franz.
> >>
> >> Sorry for the messiness of the transcript, as I've run out of time.
> >>
> >> Thanks for taking a look.
> >>
> >> Andrew
> >
> >
> >
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