[Qemu-devel] [PATCH v3 6/8] qom: object_class_property_iter_init() function

[Eduardo Habkost <ehabkost@redhat.com>]

The new function will allow us to iterate over class properties
using the same logic we use for object properties. Unit test
included.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 include/qom/object.h       | 14 ++++++++++++++
 qom/object.c               | 11 +++++++++--
 tests/check-qom-proplist.c | 28 ++++++++++++++++++++++++++++
 3 files changed, 51 insertions(+), 2 deletions(-)

diff --git a/include/qom/object.h b/include/qom/object.h
index 5ecc2d1..6e3646e 100644
--- a/include/qom/object.h
+++ b/include/qom/object.h
@@ -995,6 +995,20 @@ void object_property_iter_init(ObjectPropertyIterator *iter,
                                Object *obj);
 
 /**
+ * object_class_property_iter_init:
+ * @klass: the class
+ *
+ * Initializes an iterator for traversing all properties
+ * registered against an object class and all parent classes.
+ *
+ * It is forbidden to modify the property list while iterating,
+ * whether removing or adding properties.
+ */
+void object_class_property_iter_init(ObjectPropertyIterator *iter,
+                                     ObjectClass *klass);
+
+
+/**
  * object_property_iter_next:
  * @iter: the iterator instance
  *
diff --git a/qom/object.c b/qom/object.c
index 7a05e35..3ae9cc7 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -1010,6 +1010,14 @@ void object_property_iter_init(ObjectPropertyIterator *iter,
     iter->nextclass = object_get_class(obj);
 }
 
+
+void object_class_property_iter_init(ObjectPropertyIterator *iter,
+                                     ObjectClass *klass)
+{
+    g_hash_table_iter_init(&iter->iter, klass->properties);
+    iter->nextclass = object_class_get_parent(klass);
+}
+
 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
 {
     gpointer key, val;
@@ -1017,8 +1025,7 @@ ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
         if (!iter->nextclass) {
             return NULL;
         }
-        g_hash_table_iter_init(&iter->iter, iter->nextclass->properties);
-        iter->nextclass = object_class_get_parent(iter->nextclass);
+        object_class_property_iter_init(iter, iter->nextclass);
     }
     return val;
 }
diff --git a/tests/check-qom-proplist.c b/tests/check-qom-proplist.c
index a92acc9..769549c 100644
--- a/tests/check-qom-proplist.c
+++ b/tests/check-qom-proplist.c
@@ -496,6 +496,33 @@ static void test_dummy_iterator(void)
 }
 
 
+static void test_dummy_class_iterator(void)
+{
+    ObjectClass *klass = object_class_by_name(TYPE_DUMMY);
+    ObjectProperty *prop;
+    ObjectPropertyIterator iter;
+    bool seensv = false, seenav = false, seentype;
+
+    object_class_property_iter_init(&iter, klass);
+    while ((prop = object_property_iter_next(&iter))) {
+        if (g_str_equal(prop->name, "sv")) {
+            seensv = true;
+        } else if (g_str_equal(prop->name, "av")) {
+            seenav = true;
+        } else if (g_str_equal(prop->name, "type")) {
+            /* This prop comes from the base Object class */
+            seentype = true;
+        } else {
+            g_printerr("Found prop '%s'\n", prop->name);
+            g_assert_not_reached();
+        }
+    }
+    g_assert(seenav);
+    g_assert(seensv);
+    g_assert(seentype);
+}
+
+
 static void test_dummy_delchild(void)
 {
     Object *parent = object_get_objects_root();
@@ -524,6 +551,7 @@ int main(int argc, char **argv)
     g_test_add_func("/qom/proplist/badenum", test_dummy_badenum);
     g_test_add_func("/qom/proplist/getenum", test_dummy_getenum);
     g_test_add_func("/qom/proplist/iterator", test_dummy_iterator);
+    g_test_add_func("/qom/proplist/class_iterator", test_dummy_class_iterator);
     g_test_add_func("/qom/proplist/delchild", test_dummy_delchild);
 
     return g_test_run();
-- 
2.7.4