[PATCH 02/12] qom: New container_create()

[Peter Xu <peterx@redhat.com>]

To move towards explicit creations of containers, starting that by
providing a helper for creating container objects.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 include/qom/object.h | 12 ++++++++++++
 qom/container.c      | 18 +++++++++++++++---
 2 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/include/qom/object.h b/include/qom/object.h
index 3ba370ce9b..41ef53241e 100644
--- a/include/qom/object.h
+++ b/include/qom/object.h
@@ -2033,6 +2033,18 @@ int object_child_foreach_recursive(Object *obj,
  */
 Object *container_get(Object *root, const char *path);
 
+
+/**
+ * container_create:
+ * @root: root of the object to create the new container
+ * @name: name of the new container
+ *
+ * Create a container object under @root with @name.
+ *
+ * Returns: the newly created container object.
+ */
+Object *container_create(Object *root, const char *name);
+
 /**
  * object_property_help:
  * @name: the name of the property
diff --git a/qom/container.c b/qom/container.c
index cfec92a944..da657754a4 100644
--- a/qom/container.c
+++ b/qom/container.c
@@ -24,6 +24,20 @@ static void container_register_types(void)
     type_register_static(&container_info);
 }
 
+Object *container_create(Object *obj, const char *name)
+{
+    Object *child = object_new(TYPE_CONTAINER);
+
+    object_property_add_child(obj, name, child);
+    /*
+     * Simplify the caller by always drop the refcount directly here, as
+     * containers are normally never destroyed after created anyway.
+     */
+    object_unref(child);
+
+    return child;
+}
+
 Object *container_get(Object *root, const char *path)
 {
     Object *obj, *child;
@@ -37,9 +51,7 @@ Object *container_get(Object *root, const char *path)
     for (i = 1; parts[i] != NULL; i++, obj = child) {
         child = object_resolve_path_component(obj, parts[i]);
         if (!child) {
-            child = object_new(TYPE_CONTAINER);
-            object_property_add_child(obj, parts[i], child);
-            object_unref(child);
+            child = container_create(obj, parts[i]);
         }
     }
 
-- 
2.45.0