[PATCH v3 0/9] introduce common FOREACH_SAFE macros

[Morten Brørup]

> From: Stephen Hemminger [mailto:stephen at networkplumber.org]
> Sent: Monday, 18 August 2025 18.34
> 
> On Wed, 12 Mar 2025 16:15:29 -0700
> Stephen Hemminger <stephen at networkplumber.org> wrote:
> 
> > This series adds common macros for safe iteration over lists.
> > It is a subset copy of the macros from FreeBSD that are
> > missing from the Linux header sys/queue.h
> >
> > Chose this over several other options:
> >   - let each driver define their own as needed.
> >     One Intel driver got it wrong, others will as well.
> >   - rename all the queue macros to RTE_XXX variants.
> >     Seems like useless renaming and confusion.
> >   - Several distros have libbsd package with the correct macros.
> >     But adding yet another dependency to DPDK would be annoying
> >     for something this basic.
> >
> > There are more macros in FreeBSD header that could be useful,
> > but we can add those later as needed here.
> >
> >  lib/eal/include/rte_queue.h              | 174 +++++++++++++++++++++++
> 
> Revisiting this and wondering about naming...
> The file rte_queue.h is not really DPDK (ie not related to runtime
> environment).
> Thinking of calling it bsd_queue.h as a compromise

Since it replaces sys/queue.h, then maybe sys_queue.h (or rte_sys_queue.h).

But more importantly:
It is not really DPDK, and thus shouldn't really be part of the EAL.
So here's an idea:
As part of de-bloating the EAL, can we somehow add a new directory structure for independent "libraries" like this?
And treat this rte_queue.h file as a "header file only" library, and put it there.
Then, build wise, the EAL could depend on this "library".