From owner-freebsd-arch Sun Dec 22 23: 5:51 2002 Delivered-To: freebsd-arch@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id DB2FF37B4B6 for ; Sun, 22 Dec 2002 23:05:48 -0800 (PST) Received: from marvin.bsdng.org (24-159-239-62.jvl.wi.charter.com [24.159.239.62]) by mx1.FreeBSD.org (Postfix) with ESMTP id E6A2F43EEC for ; Sun, 22 Dec 2002 23:05:45 -0800 (PST) (envelope-from mkm@ieee.org) Received: from marvin.bsdng.org (localhost [127.0.0.1]) by marvin.bsdng.org (8.12.6/8.12.6) with ESMTP id gBN11LGq007007; Mon, 23 Dec 2002 01:01:40 GMT (envelope-from mkm@ieee.org) Date: Tue, 12 Nov 2002 11:21:52 -0600 From: Kyle Martin To: Kirk McKusick Cc: arch@freebsd.org Subject: Re: Shared-memory version of macros Message-ID: <20021112172152.GC15329@marvin.bsdng.org> References: <200211112232.gABMW459037409@beastie.mckusick.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200211112232.gABMW459037409@beastie.mckusick.com> User-Agent: Mutt/1.4i Lines: 28 Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Mon, Nov 11, 2002 at 02:32:04PM -0800, Kirk McKusick wrote: > > Historically /usr/include/sys was used to include files that > provided headers that included interfaces between the kernel > and userland. For example, describes that > stat structure which is filled in by the kernel and used > by userland applications. Since the queue macros do not > describe any kernel/userland shared structures, they belong > in /usr/include. They are much more like which > describes purely userland structures like FILE *. However, > we canot move from the /sys/sys directory as > it is needed by the kernel (indeed was originally developed > for the kernel) as there is another rule which says that > the kernel headers need to be self contained (that is the > kernel cannot depend on anything in /usr/include). So, there > is the dilemma of duplicating the queue macros used in the > kernel in a /usr/include file, or trying to avoid divergence > by pulling in the kernel macros from /usr/include/sys. As > for what userland applications should do, once > exists, they should always use that file. > perhaps "#include" could appear in /usr/include/queue.h with some typical #ifdef glue in -- Kyle Martin mkm@ieee.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message