From owner-freebsd-threads@FreeBSD.ORG Thu Dec 24 01:58:52 2009 Return-Path: Delivered-To: threads@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7C00F1065695 for ; Thu, 24 Dec 2009 01:58:52 +0000 (UTC) (envelope-from davidxu@freebsd.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 50EB98FC1D; Thu, 24 Dec 2009 01:58:52 +0000 (UTC) Received: from apple.my.domain (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.3/8.14.3) with ESMTP id nBO1wo4w035592; Thu, 24 Dec 2009 01:58:51 GMT (envelope-from davidxu@freebsd.org) Message-ID: <4B32CADA.4010407@freebsd.org> Date: Thu, 24 Dec 2009 09:58:50 +0800 From: David Xu User-Agent: Thunderbird 2.0.0.9 (X11/20080612) MIME-Version: 1.0 To: Alexander Kabaev References: <4B317741.8080004@freebsd.org> <20091223074707.2a7ca9d6@kan.dnsalias.net> <4B32C25A.8040703@freebsd.org> <20091223203539.400bbfda@kan.dnsalias.net> In-Reply-To: <20091223203539.400bbfda@kan.dnsalias.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: threads@freebsd.org Subject: Re: first patch for process-shared semaphore X-BeenThere: freebsd-threads@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Threading on FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Dec 2009 01:58:52 -0000 Alexander Kabaev wrote: > On Thu, 24 Dec 2009 09:22:34 +0800 > David Xu wrote: >> libthr does not require semaphore, it implements semaphore, >> it is easier than other ways to implement the process-shared. >> > Let me rephrase: I do not think semaphores belong in libthr. They > should be either in libc or in librt. > > OK, does others really implement semaphore in librt ? unfortunately, the librt already requires libpthread to implement SIGEV_THREAD.