Date: Tue, 9 May 2000 20:45:21 -0400 From: Garance A Drosihn <drosih@rpi.edu> To: shimon@simon-shapiro.org, freebsd-current@FreeBSD.ORG Subject: Re: One more question (different now) Message-ID: <v04210103b53e58b35363@[128.113.24.47]> In-Reply-To: <XFMail.000509190821.shimon@simon-shapiro.org> References: <XFMail.000509190821.shimon@simon-shapiro.org>
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At 7:08 PM -0400 5/9/00, Simon Shapiro wrote:
>Given:
>
>typedef struct junk {
> ...
>} junk_t
>
>volatile junk_t trash;
>
>What I want to do is zero out trash.
>
>bzero(trash, sizeof(junk_t));
>
>produces a warning about loss of volatility.
>So, how do I make everyone happy?
Write a 'bzerov' function, which takes a volatile first
parameter. Presumably you could just copy the source
for bzero and change the 1st parameter declaration...
or
write a dumb 'bzerov' macro, which casts the first
parameter to be pointer to volatile char, and then
loops over it setting to zero one byte at a time.
---
Garance Alistair Drosehn = gad@eclipse.acs.rpi.edu
Senior Systems Programmer or drosih@rpi.edu
Rensselaer Polytechnic Institute
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