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Message-ID: <20051123154423.32867.qmail@web25802.mail.ukl.yahoo.com>
Date: Wed, 23 Nov 2005 16:44:23 +0100 (CET)
From: moreau francis <francis_moreau2000@yahoo.fr>
Subject: Re: Use enum to declare errno values
To: Alan Cox <alan@lxorguk.ukuu.org.uk>, Denis Vlasenko <vda@ilport.com.ua>
Cc: moreau francis <francis_moreau2000@yahoo.fr>, linux-kernel@vger.kernel.org
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--- Alan Cox <alan@lxorguk.ukuu.org.uk> a ?crit :

> On Mer, 2005-11-23 at 16:31 +0200, Denis Vlasenko wrote:
> > Enums are really nice substitute for integer constants instead of #defines.
> > Enums obey scope rules, #defines do not.
> > 
> > However enums are not widely used because of
> > 1. tradition and style
> > 2. awkward syntax required:   enum { ABC = 123 };
> 
> The SATA layer uses enum for constants and while it was a bit of change
> in style when I met it, it does seem to work just as well
> 
> 

I guess we won't use enumeration because it needs to many changes...Each
function that returns a errno value should have their prototype changed like
this:

    int foo(void)
    {
            int retval;
            [...]
            return retval;
    }

should be changed into

    enum errnoval foo(void)
    {
            enum errnoval retval;
            [...]
            return retval;
    }


Thanks


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