From owner-cvs-all  Thu Jan  3 14:20:13 2002
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Date: Thu, 3 Jan 2002 14:00:22 -0800 (PST)
From: Julian Elischer <julian@elischer.org>
To: Matthew Dillon <dillon@apollo.backplane.com>
Cc: Poul-Henning Kamp <phk@critter.freebsd.dk>,
	Stephen McKay <mckay@thehub.com.au>, John Baldwin <jhb@FreeBSD.ORG>,
	cvs-all@FreeBSD.ORG, cvs-committers@FreeBSD.ORG,
	Julian Elischer <julian@FreeBSD.ORG>, Greg Lehey <grog@FreeBSD.ORG>
Subject: Re: cvs commit: src/share/man/man3 queue.3 
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On Thu, 3 Jan 2002, Matthew Dillon wrote:

> :
> :I don't understand your point..
> :TAILQ_FIRST() does not do a conditional to give a NULL on empty..
> :...#define TAILQ_FIRST(head)       ((head)->tqh_first)
> 
>     My example wasn't meant to be compatible with sys/queue.h, but if you
>     look at sys/queue.h you will find that CIRCLEQ_FIRST() does not 
>     return NULL on an empty list, nor does CIRCLEQ_NEXT().  You have
>     to use CIRCLEQ_EMPTY() to test for an empty lilst and you pretty
>     much have to use CIRCLEQ_FOREACH() to iterate over a list.

So what.?
We are arguing about TAILQ_FOREACH not CIRCLEQ_FOREACH (Which phk
deleted anyhow)

in any case, because TAILQ and CIRCLEQ DIFFER in this regard I'd assume
that this was a good reason to document the difference.

> 
> 					-Matt
> 					Matthew Dillon 
> 					<dillon@backplane.com>
> 


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