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qom: Add check() argument to object_property_add_link()

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There are currently three types of object_property_add_link() callers:

1. The link property may be set at any time.
2. The link property of a DeviceState instance may only be set before
   realize.
3. The link property may never be set, it is read-only.

Something similar can already be achieved with
object_property_add_str()'s set() argument.  Follow its example and add
a check() argument to object_property_add_link().

Also provide default check() functions for case #1 and #2.  Case #3 is
covered by passing a NULL function pointer.

Cc: Peter Crosthwaite <peter.crosthwaite@petalogix.com>
Cc: Alexander Graf <agraf@suse.de>
Cc: Anthony Liguori <aliguori@amazon.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
[AF: Tweaked documentation comment]
Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Stefan Hajnoczi 2014-03-19 08:58:56 +01:00 • committed by Andreas Färber
parent 9561fda8d9
commit 39f72ef94b
13 changed files with 80 additions and 4 deletions
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4
hw/pcmcia/pxa2xx.c
View file

@ -198,7 +198,9 @@ static void pxa2xx_pcmcia_initfn(Object *obj)
s->slot.irq = qemu_allocate_irqs(pxa2xx_pcmcia_set_irq, s, 1)[0];
object_property_add_link(obj, "card", TYPE_PCMCIA_CARD,
(Object **)&s->card, 0, NULL);
(Object **)&s->card,
NULL, /* read-only property */
0, NULL);
}
/* Insert a new card into a slot */