Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/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
Date: Wed, 14 Apr 2004 15:22:21 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: 1.5.9-1: socket() appears NOT to be thread-safe
Message-ID: <20040414132221.GM26558@cygbert.vinschen.de>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
References: <00c901c4220d$47f6eaa0$0200a8c0 AT em DOT noip DOT com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <00c901c4220d$47f6eaa0$0200a8c0@em.noip.com>
User-Agent: Mutt/1.4.2i

On Apr 14 18:42, Enzo Michelangeli wrote:
> While porting to Cygwin the Linux application "sipd"
> (http://www.sxdesign.com/index.php?page=developer&submnu=sipd ), which
> uses pthreads, I noticed that socket() calls issued concurrently by
> several threads often failed, with strerror(errno) saying "operation not
> permitted". Once I protected all the calls with mutex locks, such errors
> went away. Is Cygwin's implementation of socket() known to be
> thread-unsafe?

No.  If you can prepare a brief testcase to demonstrate the problem,
I'm happy to fix it.  Of course, patches would be most welcome.  See
below.

> P.S. I have written an implementation of the missing gethostbyname_r(),
> based on a mutex-protected call to gethostbyname(). If useful, I may
> gladly contribute the code.

Sure!  Unfortunately, that requires us to ask you for a copyright
assignment first.  See http://cygwin.com/contrib.html for details.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin AT cygwin DOT 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/