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
Delivered-To: mailing list cygwin AT cygwin DOT com
Message-ID: <001f01c1af62$59bf2740$ad01a8c0@jj>
From: "Jon Foster" <jon AT jon-foster DOT co DOT uk>
To: "Barubary" <barubary AT cox DOT net>, <cygwin AT cygwin DOT com>
References: <002301c1aef8$228e5440$2801a8c0 AT dcuthbert2k> <3C610F7E DOT 5020306 AT syntrex DOT com> <20020206172903 DOT GE31367 AT redhat DOT com> <3C6171A9 DOT 2080702 AT syntrex DOT com> <20020206181851 DOT GF11730 AT redhat DOT com> <035a01c1af4b$b598e9f0$a7eb0544 AT CX535256D> <20020206203254 DOT GD14490 AT redhat DOT com> <03a001c1af5d$1c05dc50$a7eb0544 AT CX535256D>
Subject: Re: MS C++ Patent (WAS: DirectX8/DirectInput + cygwin)
Date: Wed, 6 Feb 2002 23:02:28 -0000
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 5.50.4807.1700
X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4807.1700

Hi,

> I'm talking about the specific implementation of the virtual table - the
> layout of the function pointers relative to the "this" pointer.  The
> location and format of the vtable relative to the "this" pointer in Visual
> C++ is patented by Microsoft.  I wish I knew the patent number...

I think it's US Patent 5,297,284, "Method and system for implementing
virtual functions and virtual base classes and setting a this pointer for an
object-oriented programming language".

Here's a direct URL (split over 4 lines 'cos it was too long):

http://patft.uspto.gov/netacgi/nph-Parser?
Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&
u=/netahtml/srchnum.htm&r=1&f=G&l=50&s1='5297284'.WKU.&
OS=PN/5297284&RS=PN/5297284

Standard disclaimer applies to this post - I am not a lawyer. :-P

Regards,

Jon
--
"The knack of flying is learning how to throw yourself at
the ground and miss." - Hitchhiker's Guide to the Galaxy

E-mail: jon AT jon-foster DOT co DOT uk
web: http://www.jon-foster.co.uk/

----- Original Message -----
"Barubary" <barubary AT cox DOT net> wrote:
> > Aren't virtual tables a feature of "C++"?
> >
> > cgf
>
> I'm talking about the specific implementation of the virtual table - the
> layout of the function pointers relative to the "this" pointer.  The
> location and format of the vtable relative to the "this" pointer in Visual
> C++ is patented by Microsoft.  I wish I knew the patent number...
>
> -- Barubary



--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/