Date: Thu, 15 Mar 2007 22:16:47 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Yar Tikhiy <yar@comp.chem.msu.su> Cc: arch@freebsd.org Subject: Re: <sys/queue.h> bikeshed proposal Message-ID: <1301.1173997007@critter.freebsd.dk> In-Reply-To: Your message of "Thu, 15 Mar 2007 16:43:00 %2B0300." <20070315134300.GE28354@comp.chem.msu.su>
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In message <20070315134300.GE28354@comp.chem.msu.su>, Yar Tikhiy writes: >Yeah, <sys/queue.h> can present a challenge in understanding an >implementation of basic data structures and related algos. :-) >You thought that tqe_prev points to the whole entry structure when >making the patch, didn't you? Nah, I was just generally sleepy I think. >Personally, I cannot explain to myself why in the double-linked >structs the prev member points to the next member in the previous >list element and not to the previous list element itself. Could >anybody with CS education explain merits of the current approach? It allows us to isolate casts to those few backwards functions, all the forwards functions are type correct. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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