Re: [Chicken-hackers] CR #1142: remove queues, mmap, evict and binary search from core libraries

[Felix Winkelmann]

From: Peter Bex <address@hidden>
Subject: Re: [Chicken-hackers] CR #1142: remove queues, mmap, evict and binary 
search from core libraries
Date: Sun, 20 Jul 2014 13:29:44 +0200

> On Sun, Jul 20, 2014 at 01:18:37PM +0200, Felix Winkelmann wrote:
>> Hello!
>> 
>> This announces change request #1142 and proposes to remove parts of
>> the core libraries into eggs.
>> 
>> See https://bugs.call-cc.org/ticket/1142 for more details.
> 
> Excellent!  In the ticket you mention you've prepared eggs for this.
> Can we preview these eggs somewhere?

I can commit them to SVN, if you like. Or should I use a branch for
this?

> 
> I'm not 100% sure about removing object-evict from core, because of the
> problem described by #1112; this might require core support somehow to
> make the GC know which objects have been evicted.  Do you have an idea
> on how to make this work when eviction is moved into an egg?

Well, "object-become!" might be useful here, as proposed in the
ticket. Another option (for users) would be to evict into a static
buffer that can not be possibly "stolen" by a heap-enlargment.

But instead of making GC even more complicated as it is, I would
recommend to just punt on this issue. The functionality of
"object-evict"/"object-release" is very application-specific and a bit
obscure and should be considered sufficient to those who want to use
it.


felix