Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Message-ID: <001f01c1af62$59bf2740$ad01a8c0@jj> From: "Jon Foster" To: "Barubary" , References: <002301c1aef8$228e5440$2801a8c0@dcuthbert2k> <3C610F7E.5020306@syntrex.com> <20020206172903.GE31367@redhat.com> <3C6171A9.2080702@syntrex.com> <20020206181851.GF11730@redhat.com> <035a01c1af4b$b598e9f0$a7eb0544@CX535256D> <20020206203254.GD14490@redhat.com> <03a001c1af5d$1c05dc50$a7eb0544@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@jon-foster.co.uk web: http://www.jon-foster.co.uk/ ----- Original Message ----- "Barubary" 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/