Re: [boost] [pool] Improvements to boost.pool

Subject: Re: [boost] [pool] Improvements to boost.pool
From: DUPUIS Etienne (e.dupuis_at_[hidden])
Date: 2012-06-18 03:34:02

> On Wed, 16 May 2012 12:42:46 +0200, DUPUIS Etienne
> <e.dupuis_at_[hidden]>
> wrote:
>
> > In the boost sandbox, under the /pool folder, I have committed a few
> > small improvements and a few fixes for open tickets. Here is what I
> > have changed :
> >
> > 1. I added boost::static_pool, a pool whose maximum size is known when
> > initializing the pool; in which case all memory is allocated when
> > calling the constructor. This is useful for software that must manage
> > memory with great care. The implementation is a simple subclass of
> > boost::pool. In the same vein, I also added boost::static_object_pool.
> >
>
> First thanks for working on Boost.Pool at all! That library really deserves some
> improvements. :)
>
> I'm not sure whether it makes sense though to introduce more pool classes if
> the algorithm to calculate the next chunk size is hardcoded into those classes
> again. If the existing classes in Boost.Pool would support a policy class, we
> could do everything what you described above without adding new classes?
> And if I wanted I could plug-in my own policy class if for whatever reason I
> want the sizes of all chunks to be prime numbers for example. I'm not a big
> fan of policy classes. But in this case it looks like it could be a really simple
> one. I think we need only one member function which returns the next size.
> Without that flexibility I (as a library user) either have to change code in
> Boost.Pool or open a ticket and propose boost::prime_numbers_pool to be
> added. ;)
>
> Boris
>

Greetings Boris,

This is certainly a good idea. However, I consider that until there is a fix for ticket #3789 (https://svn.boost.org/trac/boost/ticket/3789), boost::pool is almost useless. Boost.Pool has no maintainer and I have no idea how to push through the fixes I made for open tickets (or get them amended or even rejected if they are bad).

Any idea ?

Regards,
Étienne

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