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Date: Mon, 3 Sep 2001 23:51:16 +0200
From: Corinna Vinschen <vinschen AT redhat DOT com>
To: cygwin-developers AT cygwin DOT com
Subject: Re: CYGWIN SERVER: Some questions
Message-ID: <20010903235116.A2421@cygbert.vinschen.de>
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References: <20010903140332 DOT C23714 AT cygbert DOT vinschen DOT de> <20010903105746 DOT B2024 AT redhat DOT com> <20010903174251 DOT E30211 AT cygbert DOT vinschen DOT de> <20010903155526 DOT B2523 AT redhat DOT com>
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In-Reply-To: <20010903155526.B2523@redhat.com>; from cgf@redhat.com on Mon, Sep 03, 2001 at 03:55:26PM -0400

On Mon, Sep 03, 2001 at 03:55:26PM -0400, Christopher Faylor wrote:
> On Mon, Sep 03, 2001 at 05:42:51PM +0200, Corinna Vinschen wrote:
> >> How about mailboxes as the communication mechanism?  They share many
> >> of the characteristics of named pipes, I believe but *I think* they
> >> work on Windows 95.
> >
> >I'm not quite sure about the seriousness of this mail but if you
> >refer to mailslots... they are just a one-way mechanism to push
> >some data to another process. No real `communication' at all.
> 
> Oops.  Yes, I meant mail slots.  They are one directional, but so are
> pipes.  You just open one mail slot for each direction.  Or, you use it
> to synchronize a shared memory region.

Named pipes under NT can be bidirectional by giving the
PIPE_ACCESS_DUPLEX flag in call to CreateNamedPipe().

Mailslots have no security mechanism so they wouldn't be the
TL I would choose for NT/W2K/XP.

Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin AT cygwin DOT com
Red Hat, Inc.