Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Date: Thu, 12 Aug 2004 15:26:51 +0200 From: Corinna Vinschen To: cygwin Subject: Re: cygserver shmat Message-ID: <20040812132651.GK1819@cygbert.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin References: <1092302630.4368.3.camel@bma.sysgo.com> <20040812093246.GB24822@cygbert.vinschen.de> <1092305627.4368.10.camel@bma.sysgo.com> <20040812104409.GA28756@cygbert.vinschen.de> <1092312195.4368.14.camel@bma.sysgo.com> <1092313150.4368.18.camel@bma.sysgo.com> <1092314682.4368.30.camel@bma.sysgo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1092314682.4368.30.camel@bma.sysgo.com> User-Agent: Mutt/1.4.2i On Aug 12 14:44, bertrand marquis wrote: > Ok i perhaps find a solution or a beginning of solution: > > the getpagesize() function return a value of 4096 for the page size and > it seems that shmat need the address to be aligned on a multiple of > SHMLBA (655539), if instead of using getpagesize value to round the size > i use the value of SHMLBA i can run the test program without any > problem. > > the thing is that this doesn't append under linux. In fact under linux > SHMLBA=getpagesize=4096 so the program run perfectly without any > problem. > > Perhaps the cygwin release of getpagesize should output also SHMLBA ? Why should it? There's nowhere defined that getpagesize() must be equal to SHMLBA. In fact, that's the reason I pointed you to the open group shmat man page. Using getpagesize() for XSI memory alignment isn't mentioned at all. Align your addresses using SHMLBA and you're all set. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Co-Project Leader mailto:cygwin@cygwin.com Red Hat, Inc. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/