Re: [boost] Proposal: Monotonic Containers - Comparison with boost::pool, boost::fast_pool and TBB

Subject: Re: [boost] Proposal: Monotonic Containers - Comparison with boost::pool, boost::fast_pool and TBB
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2009-06-21 23:56:33

AMDG

Christian Schladetsch wrote:
> I also want to again raise the issue of boost::pool_allocator and
> boost::fast_pool_allocator leaking. AFAICT, when these are used with a
> system that rebind<>'s the allocator, it results in a persistent memory leak
> (unless you happen to know the new sizes of the allocations thence made).
>   

I don't consider this an issue.  All allocators with global state are
going to have this problem.  monotonic has a different form of the
same problem.  While in your test cases, it is safe to release the
memory, in general, if you're using global storage it is not safe to
release all the memory, because some other code might still be
using it. I'll also point out that using singleton_pool::release_memory
with fast_pool_allocator ends up violating the preconditions of
pool::release_memory and therefore won't do any good.
In addition, you are not even using the correct template
parameters for the unrebound fast_pool_allocator when calling
release_memory.

> These allocators (on 1.38) also fail to compile when specialised over void
> on GCC. I'll supply a patch for that soon.
>   

No need.
https://svn.boost.org/trac/boost/changeset/49031

In Christ,
Steven Watanabe