On Wed, Jun 01, 2011 at 08:45:56AM -0700, Richard Henderson wrote: > On 06/01/2011 08:35 AM, Eduard - Gabriel Munteanu wrote: > > Maybe it's not nice, but you're missing the fact upcasting gives you > > some type safety. With opaques you have none. > > Lol. Do you understand what container_of does? > This is not dynamic_cast<> with RTTI. > > You can put any type name in there that you like, > so long as it has a field name to match. The type > of the field you give doesn't even have to match > the type of the pointer that you pass in. Uh, if that's true, that's a bug in the container_of implementation. The ccan container_of implementation, for example, certainly does check that the given field has type matching the pointer. -- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
