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To: linux-kernel@vger.kernel.org
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: C++ and the kernel
Date: 9 Apr 2002 18:52:19 -0700
Organization: Transmeta Corporation, Santa Clara CA
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In-Reply-To: <20020409122622.GN612@gallifrey> <Pine.LNX.3.95.1020409085537.4291B-100000@chaos.analogic.com>
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Copyright: Copyright 2002 H. Peter Anvin - All Rights Reserved
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Followup to:  <Pine.LNX.3.95.1020409085537.4291B-100000@chaos.analogic.com>
By author:    "Richard B. Johnson" <root@chaos.analogic.com>
In newsgroup: linux.dev.kernel
> > 
> > Bollox!
> > 
> > There are many places in the kernel that are actually very OO - look at
> > filesystems for example. The super_operations sturcture is in effect a
> > virtual function table.
> 
> The file operations structure(s) are structures. They are not object-
> oriented in any way, and they are certainly not virtual. The code that
> manipulates them is quite physical and procedural, well defined, and
> visible to the rest of the kernel.
> 

Again, bollocks.  The file operation structures are vanilla vtbl
implementations of virtual functions.  The fact that they're written

foo->f_ops->func(foo, ...);

instead of

foo->func(...);

makes absolutely no difference whatsoever.

	-hpa
-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt	<amsp@zytor.com>
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