Date: Thu, 27 Apr 2000 18:57:54 -0700 From: Jake Burkholder <jburkhol@home.com> To: Archie Cobbs <archie@FreeBSD.ORG> Cc: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, jake@io.yi.org Subject: Re: cvs commit: src/sys/sys queue.h Message-ID: <20000428015754.A7AD0BCA7@io.yi.org> In-Reply-To: Message from Archie Cobbs <archie@FreeBSD.ORG> of "Thu, 27 Apr 2000 15:50:13 PDT." <200004272250.PAA26982@freefall.freebsd.org>
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> archie 2000/04/27 15:50:13 PDT
>
> Modified files:
> sys/sys queue.h
> Log:
> Add a new macro CIRCLEQ_FOREACH_REVERSE for traversing through a
> circle queue in the reverse direction (from tail to head).
>
> Revision Changes Path
> 1.34 +6 -1 src/sys/sys/queue.h
Any reason not to do the same for TAILQ?
I think the following works:
for (var = TAILQ_LAST(head, headname);
var;
var = TAILQ_PREV(elm, headname, field))
Also, how about something like FOOQ_FOREACH_COND(var, head, field, cond)?
i.e. for (var = FOOQ_FIRST(head);
var && cond;
var = FOOQ_NEXT(var, field))
When I was cleaning up the files in sys/kern to use the macros more
consistently I noticed a lot of places that traverse lists but can't
use the FOREACH because there's another condition in the loop.
Jake
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