Re: Meaning of the specifier volatile?

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#30

From: Dominique Bernardi
Date: Thu, 04 Jan 1996 19:08

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X-Original-Date: Thu, 04 Jan 1996 16:09:37 +0100

In article (Dans l'article) <4cff74$gfj@netlab.cs.rpi.edu>,
rmartin@oma.com (Robert C. Martin) wrote (=E9crivait)=A0:

<Snip>

>int * volatile tty =3D 0x100;  // 0x100 is the addr of the tty device.
>
>*tty =3D 'h'; // prints a 'c' on the tty;
>
>void PrintMessage(char *s)
>{
>  for(; *s; s++) *tty =3D *s; // prints the string on the tty.
>}
>

I would have written

volatile int * tty =3D 0x100;  // 0x100 is the addr of the tty device.

instead. The meaning is *not* the same.
--=20
Dominique Bernardi, Theorie des Nombres
Universite Pierre et Marie Curie
4 place Jussieu - F75005 Paris Tel (33-1) 44275441
bernardi@mathp6.jussieu.fr

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Path: arc1-ca.pugleaf.net!kbad.eglin.af.mil!rpi!not-for-mail
From: bernardi@mathp6.jussieu.fr (Dominique Bernardi)
Newsgroups: comp.lang.c++.moderated,comp.lang.c++
Subject: Re: Meaning of the specifier volatile?
Date: 4 Jan 1996 19:08:26 -0000
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