Re: Dynamic allocation in the predefined language environment

["Randy Brukardt" <randy@rrsoftware.com>]

"Bob Duff" <bobduff@theworld.com> wrote in message 
news:87y4itbb0z.fsf@theworld.com...
> Matthias-Christian Ott <ott@mirix.org> writes:
...
> Anyway, your original complaint (that the language doesn't let you
> choose the storage pool used for containers) is quite correct.
> I think it was considered, but I don't remember the details.

The problem was that it isn't very useful unless one very seriously 
constrains how the implementation can implement the containers. Without such 
constraints, any pattern of allocations has to be supported (as the 
implementation of the container could do anything), whereas most of the 
interesting storage pools put some sorts of limits on the sizes and/or 
numbers of allocations to get more deterministic memory management than the 
default storage pool. The original consideration was an alternative to the 
bounded containers for deterministic memory management, and allowing 
user-defined storage pools didn't really help with that. Thus they were not 
pursued further for Ada 2012.

There are other possible uses, of course, and perhaps we'll revisit this 
someday (they came up briefly during the recent ARG meeting, although I 
forget why).

                                             Randy.