> On Tuesday 25 June 2002 10:50 am, Stephen Pair wrote:
> > I've posted the code as is, with a brief overview at: 
> > http://spair.swiki.net/24
> 
> Thanks, Stephen!
> 
> Three questions:
> 
> 1. Where's the C part that lives between the plugin and BerkeleyDB? 
> (i.e sqDbCursor())

Oops!  I forgot!  DatabasePlugin.h and sqBerkeleyDatabase.c are now on
the website.
 
> 2. Is primitiveDbCursor: the only primitive needed? It's the only one 
> I noticed... but I see references to primDbClose: as well (but no 
> definitions). And I don't see primitiveDbCursor: being called from 
> anywhere.

Oops! It appears I had things spread over a couple of change sets.  I've
uploaded DBMapping.2.cs that should include all of the primitives.

> 3. Can this be used safely from multiple processes? I see that you're 
> doing mark/sweep garbage collection on the DB itself; is this 
> multi-process safe?

No, I haven't done anything yet to ensure process safety.  You should
definitely not use the DB while running garbage collection.

Here's a little tip...if you want to examine the layout of an object
cluster, use PdbPersistentMemory>>interpret:.  That methods takes a
PdbObjectReference as a parameter, fetches the bytes for that pid, and
answers a string describing the bytes stored at that pid.

- Stephen