Re: [Qemu-devel] Re: [PATCH 00/15] QAPI Round 1 (core code generator) (v2)

[Anthony Liguori]

On 03/17/2011 07:21 AM, Kevin Wolf wrote:
> > > Another detail is that, event extension is more important than command
> > > extension, because it's probably going to happen. I think it would be very
> > > bad to add new events just because we wanted to add a new field.
> > The way this is typically handled is that signals tend to pass
> > structures instead of lots of fields.  For instance, most of the GDK
> > events just pass a structure for the event (like GdkButtonEvent).
> Can we do that with existing events or would we break the external
> interface because we'd have to nest everything one level deeper?

We have to introduce new versions of existing events anyway so we can 
make sure to nest the structures appropriately.  I think BLOCK_IO_ERROR 
is the only one that isn't doing this today FWIW.

Regards,

Anthony Liguori

> Kevin