Mailing-List: contact cygwin-developers-help AT sourceware DOT cygnus DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-developers-subscribe AT sources DOT redhat DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin-developers/>
List-Post: <mailto:cygwin-developers AT sources DOT redhat DOT com>
List-Help: <mailto:cygwin-developers-help AT sources DOT redhat DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-developers-owner AT sources DOT redhat DOT com
Delivered-To: mailing list cygwin-developers AT sources DOT redhat DOT com
Date: Wed, 12 Sep 2001 12:56:41 -0400
From: Christopher Faylor <cgf AT redhat DOT com>
To: cygwin-developers AT cygwin DOT com
Subject: Re: Quick testfeedback...
Message-ID: <20010912125641.A18358@redhat.com>
Reply-To: cygwin-developers AT cygwin DOT com
Mail-Followup-To: cygwin-developers AT cygwin DOT com
References: <1000209619 DOT 7293 DOT 196 DOT camel AT lifelesswks> <20010912184031 DOT X1285 AT cygbert DOT vinschen DOT de> <20010912184812 DOT Z1285 AT cygbert DOT vinschen DOT de>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20010912184812.Z1285@cygbert.vinschen.de>
User-Agent: Mutt/1.3.21i

On Wed, Sep 12, 2001 at 06:48:12PM +0200, Corinna Vinschen wrote:
>On Wed, Sep 12, 2001 at 06:40:31PM +0200, Corinna Vinschen wrote:
>> On Tue, Sep 11, 2001 at 10:00:11PM +1000, Robert Collins wrote:
>> > +  if (iswinnt)
>> > +    InitializeCriticalSection (&criticalsection);
>> > +  else
>> > +    {
>> > +      this->win32_obj_id =::CreateMutex (&sec_none_nih, false, NULL);
>> > +      if (!win32_obj_id)
>> > +        magic = 0;
>> > +    }
>> 
>> Could somebody give me a short hint why we're using critical
>> sections on NT only?  I need some three word only description...
>> something memorable...
>
>Whoops, is the fact that TryEnterCriticalSection() is only
>available since NT4 the reason, perhaps???

Apparently.

Cygwin's muto class actually does a sort of critical section and has
TryEnterCriticalSection capabilities.

I don't think that mutos are necessarily general purpose enough for
this but maybe we could do something similar.  Or we could probably
roll our own version of TryEnterCriticalSection.

cgf