patch: mt_allocator.h

[Paolo Carlini]

Dhruv Matani wrote:

>> Before any other consideration: is this regtested?
>
> It originally wasn't, but after running it, the patch did pass the
> tests, so it's ok ;-)

Ok, thanks. Check-performance too?

I agree with you that, at least, this is the original SGI/HP design
for pool_allocator: see the attached patch, which I will commit soon
to mainline (if nobody object, indeed).

About mt_allocator, I'd like to think about it a little bit more: I'm
not 1000% sure that this is always the best choice also in presence of
threads, and so on.

In any case, what about not splitting mt_allocator in a __gnu_internal::
part and a std:: part? Can't we put *all* the implementation details
inside _Mt_alloc_base?

Paolo.

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