add Lua bindings for ubus events

[project/ubus.git] / ubusd_obj.c

diff --git a/ubusd_obj.c b/ubusd_obj.c
index d1e53f8..3859c45 100644 (file)
--- a/ubusd_obj.c
+++ b/ubusd_obj.c
@@ -1,3 +1,16 @@
+/*
+ * Copyright (C) 2011 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
 #include "ubusd.h"
 #include "ubusd_obj.h"
 
@@ -31,7 +44,7 @@ static bool ubus_create_obj_method(struct ubus_object_type *type, struct blob_at
        if (!m)
                return false;
 
-       list_add(&m->list, &type->methods);
+       list_add_tail(&m->list, &type->methods);
        memcpy(m->data, attr, bloblen);
        m->name = blobmsg_name(m->data);
 
@@ -99,6 +112,8 @@ struct ubus_object *ubusd_create_object_internal(struct ubus_object_type *type,
        obj->type = type;
        INIT_LIST_HEAD(&obj->list);
        INIT_LIST_HEAD(&obj->events);
+       INIT_LIST_HEAD(&obj->subscribers);
+       INIT_LIST_HEAD(&obj->target_list);
        if (type)
                type->refcount++;
 
@@ -119,9 +134,6 @@ struct ubus_object *ubusd_create_object(struct ubus_client *cl, struct blob_attr
        else if (attr[UBUS_ATTR_SIGNATURE])
                type = ubus_create_obj_type(attr[UBUS_ATTR_SIGNATURE]);
 
-       if (!!type ^ !!attr[UBUS_ATTR_OBJPATH])
-               return NULL;
-
        obj = ubusd_create_object_internal(type, 0);
        if (type)
                ubus_unref_object_type(type);
@@ -135,10 +147,11 @@ struct ubus_object *ubusd_create_object(struct ubus_client *cl, struct blob_attr
                        goto free;
 
                if (avl_insert(&path, &obj->path) != 0) {
-                       free(obj->path.key);
+                       free((void *) obj->path.key);
                        obj->path.key = NULL;
                        goto free;
                }
+               ubusd_send_obj_event(obj, true);
        }
 
        obj->client = cl;
@@ -151,12 +164,52 @@ free:
        return NULL;
 }
 
+void ubus_subscribe(struct ubus_object *obj, struct ubus_object *target)
+{
+       struct ubus_subscription *s;
+       bool first = list_empty(&target->subscribers);
+
+       s = calloc(1, sizeof(*s));
+       if (!s)
+               return;
+
+       s->subscriber = obj;
+       s->target = target;
+       list_add(&s->list, &target->subscribers);
+       list_add(&s->target_list, &obj->target_list);
+
+       if (first)
+               ubus_notify_subscription(target);
+}
+
+void ubus_unsubscribe(struct ubus_subscription *s)
+{
+       struct ubus_object *obj = s->target;
+
+       list_del(&s->list);
+       list_del(&s->target_list);
+       free(s);
+
+       if (list_empty(&obj->subscribers))
+               ubus_notify_subscription(obj);
+}
+
 void ubusd_free_object(struct ubus_object *obj)
 {
+       struct ubus_subscription *s, *tmp;
+
+       list_for_each_entry_safe(s, tmp, &obj->target_list, target_list) {
+               ubus_unsubscribe(s);
+       }
+       list_for_each_entry_safe(s, tmp, &obj->subscribers, list) {
+               ubus_notify_unsubscribe(s);
+       }
+
        ubusd_event_cleanup_object(obj);
        if (obj->path.key) {
+               ubusd_send_obj_event(obj, false);
                avl_delete(&path, &obj->path);
-               free(obj->path.key);
+               free((void *) obj->path.key);
        }
        if (!list_empty(&obj->list))
                list_del(&obj->list);