[Qemu-devel] [PATCH v3 2/5] qmp: convert to use object_property_foreach iterators

["Daniel P. Berrange" <berrange@redhat.com>]

Rather than directly traversing the object property list,
use the object_property_foreach iterator. This removes a
dependancy on the implementation approach for properties.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
 qmp.c | 103 ++++++++++++++++++++++++++++++++++++++----------------------------
 1 file changed, 59 insertions(+), 44 deletions(-)

diff --git a/qmp.c b/qmp.c
index 057a7cb..9baad84 100644
--- a/qmp.c
+++ b/qmp.c
@@ -202,12 +202,29 @@ void qmp_system_wakeup(Error **errp)
     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 }
 
+
+static void qmp_qom_list_iter(Object *obj,
+                              ObjectProperty *prop,
+                              Error **errp,
+                              void *opaque)
+{
+    ObjectPropertyInfoList **props = opaque;
+
+    ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
+
+    entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
+    entry->next = *props;
+    *props = entry;
+
+    entry->value->name = g_strdup(prop->name);
+    entry->value->type = g_strdup(prop->type);
+}
+
 ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
 {
     Object *obj;
     bool ambiguous = false;
     ObjectPropertyInfoList *props = NULL;
-    ObjectProperty *prop;
 
     obj = object_resolve_path(path, &ambiguous);
     if (obj == NULL) {
@@ -220,17 +237,7 @@ ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
         return NULL;
     }
 
-    QTAILQ_FOREACH(prop, &obj->properties, node) {
-        ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
-
-        entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
-        entry->next = props;
-        props = entry;
-
-        entry->value->name = g_strdup(prop->name);
-        entry->value->type = g_strdup(prop->type);
-    }
-
+    object_property_foreach(obj, qmp_qom_list_iter, NULL, &props);
     return props;
 }
 
@@ -494,12 +501,49 @@ static DevicePropertyInfo *make_device_property_info(ObjectClass *klass,
     return info;
 }
 
+static void qmp_device_list_properties_iter(Object *obj,
+                                            ObjectProperty *prop,
+                                            Error **errp,
+                                            void *opaque)
+{
+    DevicePropertyInfoList **props = opaque;
+    DevicePropertyInfo *info;
+    DevicePropertyInfoList *entry;
+
+    /* Skip Object and DeviceState properties */
+    if (strcmp(prop->name, "type") == 0 ||
+        strcmp(prop->name, "realized") == 0 ||
+        strcmp(prop->name, "hotpluggable") == 0 ||
+        strcmp(prop->name, "hotplugged") == 0 ||
+        strcmp(prop->name, "parent_bus") == 0) {
+        return;
+    }
+
+    /* Skip legacy properties since they are just string versions of
+     * properties that we already list.
+     */
+    if (strstart(prop->name, "legacy-", NULL)) {
+        return;
+    }
+
+    info = make_device_property_info(object_get_class(obj),
+                                     prop->name, prop->type,
+                                     prop->description);
+    if (!info) {
+        return;
+    }
+
+    entry = g_malloc0(sizeof(*entry));
+    entry->value = info;
+    entry->next = *props;
+    *props = entry;
+}
+
 DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
                                                    Error **errp)
 {
     ObjectClass *klass;
     Object *obj;
-    ObjectProperty *prop;
     DevicePropertyInfoList *prop_list = NULL;
 
     klass = object_class_by_name(typename);
@@ -517,37 +561,8 @@ DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
 
     obj = object_new(typename);
 
-    QTAILQ_FOREACH(prop, &obj->properties, node) {
-        DevicePropertyInfo *info;
-        DevicePropertyInfoList *entry;
-
-        /* Skip Object and DeviceState properties */
-        if (strcmp(prop->name, "type") == 0 ||
-            strcmp(prop->name, "realized") == 0 ||
-            strcmp(prop->name, "hotpluggable") == 0 ||
-            strcmp(prop->name, "hotplugged") == 0 ||
-            strcmp(prop->name, "parent_bus") == 0) {
-            continue;
-        }
-
-        /* Skip legacy properties since they are just string versions of
-         * properties that we already list.
-         */
-        if (strstart(prop->name, "legacy-", NULL)) {
-            continue;
-        }
-
-        info = make_device_property_info(klass, prop->name, prop->type,
-                                         prop->description);
-        if (!info) {
-            continue;
-        }
-
-        entry = g_malloc0(sizeof(*entry));
-        entry->value = info;
-        entry->next = prop_list;
-        prop_list = entry;
-    }
+    object_property_foreach(obj, qmp_device_list_properties_iter,
+                            NULL, &prop_list);
 
     object_unref(obj);
 
-- 
2.4.3