Mailing-List: contact cygwin-help AT sourceware DOT cygnus DOT com; run by ezmlm
List-Unsubscribe: <mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT sourceware DOT cygnus DOT com>
List-Archive: <http://sourceware.cygnus.com/ml/cygwin/>
List-Post: <mailto:cygwin AT sourceware DOT cygnus DOT com>
List-Help: <mailto:cygwin-help AT sourceware DOT cygnus DOT com>,
	<http://sourceware.cygnus.com/ml/#faqs>
Sender: cygwin-owner AT sourceware DOT cygnus DOT com
Delivered-To: mailing list cygwin AT sourceware DOT cygnus DOT com
Message-ID: <2E7F82FAC1FCD2118E1500A024B3BF907DED3E@exchange.mmp.plzen-city.cz>
From: Horak Daniel <horak AT mmp DOT plzen-city DOT cz>
To: "'cygwin AT sourceware DOT cygnus DOT com'" <cygwin AT sourceware DOT cygnus DOT com>,
        Tom Lane <tgl AT sss DOT pgh DOT pa DOT us>
Cc: "'Joost Kraaijeveld'" <JKraaijeveld AT askesis DOT nl>
Subject: RE: [HACKERS] backend freezeing on win32 fixed (I hope ;-) )
Date: Tue, 17 Aug 1999 13:52:43 +0200
MIME-Version: 1.0
X-Mailer: Internet Mail Service (5.5.2448.0)
Content-Type: text/plain;
	charset="iso-8859-1"

> On Mon, Aug 16, 1999 at 10:07:00AM -0400, Tom Lane wrote:
> >Is it possible that the CygWin environment doesn't have a correct
> >emulation of IPC semaphores, such that a sema allocated by 
> one process
> >(the postmaster) is not available to other procs (the backends)?
> >That would explain preallocation not working --- but if 
> that's it then
> >we have major problems in other places, since the code assumes that a
> >sema once allocated will remain available to later backends.
> 
> We don't have correct emulation of IPC semapahores since they are not
> implemented at all.  I assume that if you're relying on persistent
> semaphores, then some add-on package is being used.

We are using the cygipc library from Ludovic Lange
(http://www.multione.capgemini.fr/tools/pack_ipc/) which is the only
implementation of SysV IPC for Cygwin I know.

			Dan

--
Want to unsubscribe from this list?
Send a message to cygwin-unsubscribe AT sourceware DOT cygnus DOT com