Il 07/02/2014 13:49, Andreas Färber ha scritto:
qdev is a framework from Paul Brook with a bus-tree-oriented graph.
QOM by comparison uses an arbitrary composition tree of child<> nodes.
qdev as such no longer exists since late 2011 / early 2012.
Let me be blunt: to me, this is a huge, huge delusion. And I guess this
difference in views is why we keep talking past each other.
First, having to kill qdev is a dogma at best. QOM allows more
expressive relationships than just bus-children, but real hardware does
have buses. A bus is not just a n:1 relationship between a controller
and a controlled device. Buses, not composition, describe the path that
signals actually follow while the system runs. Composition lets you
understand how a system is built. Buses lets you run it.
Second, if anyone killed qdev, I didn't notice. At best, qdev is now
implemented on top of QOM. And in fact, the "fake" buses that qdev
introduced are all still there, so whoever "killed" qdev left quite a
few traces behind him.
Paolo
