ubus: add notification for subscribers present/gone

[project/ubus.git] / ubusd_obj.c

diff --git a/ubusd_obj.c b/ubusd_obj.c
index 8b1b18f..69ca8b8 100644 (file)
--- a/ubusd_obj.c
+++ b/ubusd_obj.c
@@ -167,6 +167,7 @@ free:
 void ubus_subscribe(struct ubus_object *obj, struct ubus_object *target, const char *method)
 {
        struct ubus_subscription *s;
+       bool first = list_empty(&target->subscribers);
 
        s = calloc(1, sizeof(*s) + strlen(method) + 1);
        if (!s)
@@ -177,13 +178,21 @@ void ubus_subscribe(struct ubus_object *obj, struct ubus_object *target, const c
        list_add(&s->list, &target->subscribers);
        list_add(&s->target_list, &obj->target_list);
        strcpy(s->method, method);
+
+       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)