Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Subject:	Re: cygserver shmat
From:	bertrand marquis <bertrand DOT marquis AT sysgo DOT com>
To:	cygwin <cygwin AT cygwin DOT com>
In-Reply-To:	<1092312195.4368.14.camel@bma.sysgo.com>
References:	<1092302630 DOT 4368 DOT 3 DOT camel AT bma DOT sysgo DOT com> <20040812093246 DOT GB24822 AT cygbert DOT vinschen DOT de> <1092305627 DOT 4368 DOT 10 DOT camel AT bma DOT sysgo DOT com> <20040812104409 DOT GA28756 AT cygbert DOT vinschen DOT de> <1092312195 DOT 4368 DOT 14 DOT camel AT bma DOT sysgo DOT com>
Organization:	SYSGO AG
Message-Id:	<1092313150.4368.18.camel@bma.sysgo.com>
Mime-Version:	1.0
Date:	12 Aug 2004 14:19:10 +0200
X-Spam-Checker-Version:	SpamAssassin 2.63 (2004-01-11) on donald.sysgo.com
X-Spam-Level:
X-Spam-Status:	No, hits=-4.9 required=5.0 tests=BAYES_00 autolearn=no version=2.63
X-AntiVirus:	checked by AntiVir MailGate (version: 2.0.1.16; AVE: 6.27.0.4; VDF: 6.27.0.8; host: mailgate.sysgo.de)
X-MIME-Autoconverted:	from quoted-printable to 8bit by delorie.com id i7CCJsCm024099

Le jeu 12/08/2004 à 14:03, bertrand marquis a écrit :
> Le jeu 12/08/2004 à 12:44, Corinna Vinschen a écrit :
> > On Aug 12 12:13, bertrand marquis wrote:
> > > In fact i wasn't using the SHM_RNd flag.
> > > 
> > > In details here is what i do:
> > > 
> > > - get a shared segment of with size= SIZE (SIZE multiple of SHMLBA)
> > > - attach the segment without specifying address and storing the result
> > > in beginaddress
> > > - attach the segment again specifying the address: endposition=
> > > beginaddress + SIZE
> > > 
> > > without SHM_RND in the second shmat i've got the error : invalid
> > > argument
> > > 
> > > now that i specifie SHM_RND in the flag i have the error: value to large
> > > for defined type ....
> > > 
> > > any idea ?
> > 
> > Nope.  Not without knowing the actual values.  An strace output of
> > the affected calls would be good.  Even better, create a simple testcase
> > which allows to reproduce the behaviour.  Just the minimum of necessary
> > code.
> > 
> > 
> > Corinna
> 
> 
> Ok,
> 
> i have made a minimum program showing the problem.
> You can try specifying or not SHM_RND in the second shmat, without i
> have INvalid argument error and with i have value too large for defined
> data type.
> 
> 
> thanks
> bertrand
> 
> ______________________________________________________________________
Hello

Running some tests it seems that specifying an adress is not the problem
because if i give an adress in the first shmat it is running well as
long as this adress is free.
In fact the problem is only when specifying an adress for mapping the
same segment twice and only if we specifie the adress the second time.

i hope it could help or give an idea to someone.

bertrand


--
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/

- Raw text -