[libvirt] [PATCH 22/34] Removed virDomainEventPtr in favor of virObjectEventPtr

[Daniel P. Berrange]

On Mon, Dec 02, 2013 at 01:50:58PM +0100, Cedric Bosdonnat wrote:
> On Fri, 2013-11-29 at 17:18 +0000, Daniel P. Berrange wrote:
> > On Fri, Nov 29, 2013 at 04:18:58PM +0100, Cédric Bosdonnat wrote:
> > > The virDomainEvent class wasn't defining anything special, thus it has
> > > been dropped.
> > 
> > 
> > > diff --git a/src/conf/domain_event.c b/src/conf/domain_event.c
> > > index 7694fcc..d4ecc23 100644
> > > --- a/src/conf/domain_event.c
> > > +++ b/src/conf/domain_event.c
> > 
> > > @@ -107,16 +105,11 @@ static void virDomainEventDeviceRemovedDispose(void *obj);
> > >  struct _virObjectEvent {
> > >      virObject parent;
> > >      int eventID;
> > > -};
> > > -
> > > -struct _virDomainEvent {
> > > -    virObjectEvent parent;
> > > -
> > >      virObjectMeta meta;
> > >  };
> > 
> > Ok, so you're merging virObjectMeta into the parent class. I understand why
> > you want to keep a single set of metadata for all object types. This does
> > mostly work. We should be aware of the fact that different objects have
> > a different set of valid attributes
> > 
> >  - virDomainPtr - id, name, uuid
> >  - virNetworkPtr - name, uuid
> >  - virStoragePoolPtr - name, uuid
> >  - virInterfacePtr - name
> >  - virSecretPtr - uuid
> >  - virNodeDevicePtr - name
> >  - virNWfilterPtr - name, uuid
> 
> In most of the cases, the uuid is used for the filtering... but that can
> be improved later for virInterfacePtr and virInterfacePtr.
> 
> > Even if we don't store any custom data in the virDomainEvent class its
> > existance does tell you information about the metadata attributes that
> > are valid for this class. Even if we don't use it right now, this feels
> > like a useful class representation to have available.
> 
> The problem is that virClassNew is failing to create a class that has no
> new attribute due to objectSize <= parent->objectSize. I'm tempted to
> replace the '<=' in that test by '<'. Any objection?

Actually that check has caught quite a few bugs in the past so would
rather not relax that. Just add a unused 'bool dummy' field to it.

Daniel
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