From: Paolo Bonzini <pbonzini@redhat.com>
To: Eric Blake <eblake@redhat.com>,
Markus Armbruster <armbru@redhat.com>,
Peter Maydell <peter.maydell@linaro.org>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] DO_UPCAST confusion
Date: Thu, 22 Oct 2015 16:00:55 +0200 [thread overview]
Message-ID: <5628EC17.9060503@redhat.com> (raw)
In-Reply-To: <5628EABF.8060009@redhat.com>
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On 22/10/2015 15:55, Eric Blake wrote:
> Or maybe container_of_first(), to make it obvious that the parent
> class is the first member.
>
> But how often does it really matter whether the container of the
> parent class had the parent as the first member? I guess we'll
> find out as we try to nuke DO_UPCAST.
It's just a compile-time check. DO_UPCAST is basically a type-safe(r)
version of (Foo *)bar.
Paolo
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next prev parent reply other threads:[~2015-10-22 14:01 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-21 22:49 [Qemu-devel] DO_UPCAST confusion Eric Blake
2015-10-22 7:26 ` Gerd Hoffmann
2015-10-22 9:58 ` Peter Maydell
2015-10-22 12:00 ` Markus Armbruster
2015-10-22 13:55 ` Eric Blake
2015-10-22 14:00 ` Paolo Bonzini [this message]
2015-10-22 14:48 ` Markus Armbruster
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