Re: Proposal: block-based vector allocator

[Dmitry Antipov]

On 05/22/2012 12:12 AM, Stefan Monnier wrote:

> > IIUC, if/when we will have mmap()ed Lisp_Objects someday, this should help
> > malloc() to do direct mmap()/munmap() of page-size vector blocks.
>
> There are several conditions here, some of them might never
> actually happen.  So I'd rather not worry about it for now.

OK

> > As for the roundup() check, it looks like GNU/Linux and *BSD systems
> > both has it in sys/param.h, but (Open)Solaris uses sys/sysmacros.h.
> > So I'm trying to check for the most common case and then fall back
> > to simple default.
>
> Since it's a constant we can choose, we can choose that constant to be
> one that makes for efficient code.  So I think we don't need to use some
> predefined macro but can code up our own, custom-designed for our
> specific needs, without worry about where various systems define
> `roundup'.

OK

Dmitry

vector_alloc.patch
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