From: James Morris <jmorris@intercode.com.au>
To: Davide Libenzi <davidel@xmailserver.org>
Cc: Matthew Wilcox <willy@debian.org>,
Patrick Mochel <mochel@osdl.org>, <linux-kernel@vger.kernel.org>
Subject: Re: kobjects, sysfs and the driver model make my head hurt
Date: Mon, 7 Jul 2003 03:03:58 +1000 (EST) [thread overview]
Message-ID: <Mutt.LNX.4.44.0307070300180.930-100000@excalibur.intercode.com.au> (raw)
In-Reply-To: <Pine.LNX.4.55.0307060935140.14675@bigblue.dev.mcafeelabs.com>
On Sun, 6 Jul 2003, Davide Libenzi wrote:
> On Sun, 6 Jul 2003, Matthew Wilcox wrote:
>
> > Why on earth does it return the value of its argument?
>
> Maybe for the same reason 'strcpy' returns 'dest'. It allows you to use
> the function in a function parameter :
It also makes calling code cleaner when copying refcounted objects:
e.g.
new->foo = foo_get(old->foo);
new->bar = bar_get(old->bar);
otherwise, you'd have to do:
foo_get(old->foo);
new->foo = old->foo;
bar_get(old->bar);
new->bar = old->bar;
- James
--
James Morris
<jmorris@intercode.com.au>
next prev parent reply other threads:[~2003-07-06 16:49 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-06 16:33 Matthew Wilcox
2003-07-06 16:42 ` Davide Libenzi
2003-07-06 17:03 ` James Morris [this message]
2003-07-06 17:15 ` Jeff Garzik
2003-07-07 7:05 ` Johan.Adolfsson
2003-07-06 16:46 ` Greg KH
2003-07-06 16:54 ` Jeff Garzik
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