Mailing-List: contact cygwin-help@sourceware.cygnus.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@sources.redhat.com Delivered-To: mailing list cygwin@sources.redhat.com Message-ID: <033501c0fdd1$87ab0c20$0200a8c0@lifelesswks> From: "Robert Collins" To: , "Brian Michael Genisio" Cc: References: <200106251947.f5PJl3j26688@pilot24.cl.msu.edu> Subject: Re: mmap not share Date: Tue, 26 Jun 2001 09:49:52 +1000 MIME-Version: 1.0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 X-OriginalArrivalTime: 25 Jun 2001 23:38:10.0881 (UTC) FILETIME=[E5060B10:01C0FDCF] ----- Original Message ----- From: "Brian Michael Genisio" To: Cc: Sent: Tuesday, June 26, 2001 5:47 AM Subject: Re: mmap not share > > Dirk, > This mmap thing is annoying... not only because mmap does not sync correctly, > but because the cygipc shared memory interface uses mmap to do it's > dirtywork... so mmaped files AND shm do not work correctly!!!! > > This racked my brain for a long while, until I created a workaround... If I > wanted to re-read the mmapped file, I had to unmap, and re-map... I created a > function I called mmap_sync (instead of calling msync, which does not work > either) and I put the unmap and map again in it... It created a lot of needless > overhead, but it was all I could think of to work around it... > > I hope I was of some help, and please tell me if you figure it out. > Brian > Brian, have you considered fixing this in cygwin1.dll, not in cygipc? That way your workaround would allow everyone access. (I suspect your workaround isn't the appropriate fix, but nevertheless).. Rob -- Want to unsubscribe from this list? Check out: http://cygwin.com/ml/#unsubscribe-simple