[Qemu-devel] [PATCH for-next v2 01/22] object: Add OBJECT_GET_PARENT_CLASS() macro

["Andreas Färber" <afaerber@suse.de>]

The object argument is currently unused and may be used to optimize the
class lookup when needed.

Inspired-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
 include/qom/object.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/qom/object.h b/include/qom/object.h
index 23fc048..a8e71dc 100644
--- a/include/qom/object.h
+++ b/include/qom/object.h
@@ -511,6 +511,16 @@ struct TypeInfo
     OBJECT_CLASS_CHECK(class, object_get_class(OBJECT(obj)), name)
 
 /**
+ * OBJECT_GET_PARENT_CLASS:
+ * @obj: The object to obtain the parent class for.
+ * @name: The QOM typename of @obj.
+ *
+ * Returns the parent class for a given object of a specific class.
+ */
+#define OBJECT_GET_PARENT_CLASS(obj, name) \
+    object_class_get_parent(object_class_by_name(name))
+
+/**
  * InterfaceInfo:
  * @type: The name of the interface.
  *
-- 
1.8.1.4