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From: Warren <ve3wwg@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: User Defined Storage Pool : did you ever experiment with it ?
Date: Wed, 26 Jan 2011 20:13:29 +0000 (UTC)
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=?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?= =?utf-8?Q?=29?=
expounded in news:op.vpont3pqule2fv@garhos: 

> Ada has provision for user defined storage pool, that is,
> an application  may have a (or multiple) custom
> implementation of a heap or like for any  kind of object.
> http://www.ida.liu.se/edu/ugrad/progkon/Ada/ada-doc/LRM95/rm
> 95html/rm9x-13-11.html (from an uknown site, AdaIC server
> seems down today) 
..

It can be useful when you want to preallocate a maximum amount 
of allocatable memory to a class of (by usage) objects. 
Emulator or simulators use this for safety. This avoids an 
errant emulation from allocating all of user memory and 
trashing the emulator's own environment by thrashing/swapping 
all available user memory.

Another useful application is permitting objects of a 
particular class (of use) to be allocated from a pool. Then at 
a clearly defined point in the code, _all_ of those objects 
can be efficiently released by freeing the entire pool. No 
list traversal (or list maintenance) is required.

Warren