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From: Paul Brook <paul@codesourcery.com>
Subject: Re: [Qemu-devel] [PATCH] use qemu_malloc and friends consistently
Date: Tue, 2 Jun 2009 19:13:08 +0100
References: <200905290758.11551.jcd@tribudubois.net>
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To: qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>, David Turner <digit@google.com>, Gerd Hoffmann <kraxel@redhat.com>, Jean-Christophe Dubois <jcd@tribudubois.net>

> >  QEMU_NEW_ARRAY(ptr, ...);
> >
> > instead of
> >
> >  ptr = QEMU_NEW_ARRAY(...);
> >
> > then.  I don't see another easy way to get the automagic sizeof(*ptr)
> > stuff done though.
>
> The first version will extract the item size automatically for you, making
> it less likely that you screw things in the second version's parameter
> list.

Not if you do it properly it won't. Implicit casts are only silently allowed 
between void* and arbitrary pointers. A cast between two arbitrary pointers 
will generate a compiler diagnostic.

Paul