ubus: add notification for subscribers present/gone

[project/ubus.git] / libubus.h

diff --git a/libubus.h b/libubus.h
index 59d981e..19a4217 100644 (file)
--- a/libubus.h
+++ b/libubus.h
@@ -29,7 +29,7 @@ struct ubus_request;
 struct ubus_request_data;
 struct ubus_object_data;
 struct ubus_event_handler;
-struct ubus_watch_object;
+struct ubus_subscriber;
 
 typedef void (*ubus_lookup_handler_t)(struct ubus_context *ctx,
                                      struct ubus_object_data *obj,
@@ -37,10 +37,11 @@ typedef void (*ubus_lookup_handler_t)(struct ubus_context *ctx,
 typedef int (*ubus_handler_t)(struct ubus_context *ctx, struct ubus_object *obj,
                              struct ubus_request_data *req,
                              const char *method, struct blob_attr *msg);
+typedef void (*ubus_state_handler_t)(struct ubus_context *ctx, struct ubus_object *obj);
+typedef void (*ubus_remove_handler_t)(struct ubus_context *ctx,
+                                     struct ubus_subscriber *obj, uint32_t id);
 typedef void (*ubus_event_handler_t)(struct ubus_context *ctx, struct ubus_event_handler *ev,
                                     const char *type, struct blob_attr *msg);
-typedef void (*ubus_watch_handler_t)(struct ubus_context *ctx, struct ubus_watch_object *w,
-                                    uint32_t id);
 typedef void (*ubus_data_handler_t)(struct ubus_request *req,
                                    int type, struct blob_attr *msg);
 typedef void (*ubus_complete_handler_t)(struct ubus_request *req, int ret);
@@ -86,14 +87,18 @@ struct ubus_object {
        const char *path;
        struct ubus_object_type *type;
 
+       ubus_state_handler_t subscribe_cb;
+       bool has_subscribers;
+
        const struct ubus_method *methods;
        int n_methods;
 };
 
-struct ubus_watch_object {
+struct ubus_subscriber {
        struct ubus_object obj;
 
-       ubus_watch_handler_t cb;
+       ubus_handler_t cb;
+       ubus_remove_handler_t remove_cb;
 };
 
 struct ubus_event_handler {
@@ -133,6 +138,7 @@ struct ubus_request_data {
        uint32_t peer;
        uint32_t seq;
        bool deferred;
+       bool notify;
 };
 
 struct ubus_request {
@@ -199,12 +205,10 @@ int ubus_add_object(struct ubus_context *ctx, struct ubus_object *obj);
 /* remove the object from the ubus connection */
 int ubus_remove_object(struct ubus_context *ctx, struct ubus_object *obj);
 
-/* add an object for watching other object state changes */
-int ubus_register_watch_object(struct ubus_context *ctx, struct ubus_watch_object *obj);
-
-int ubus_watch_object_add(struct ubus_context *ctx, struct ubus_watch_object *obj, uint32_t id);
-
-int ubus_watch_object_remove(struct ubus_context *ctx, struct ubus_watch_object *obj, uint32_t id);
+/* add a subscriber notifications from another object */
+int ubus_register_subscriber(struct ubus_context *ctx, struct ubus_subscriber *obj);
+int ubus_subscribe(struct ubus_context *ctx, struct ubus_subscriber *obj, uint32_t id);
+int ubus_unsubscribe(struct ubus_context *ctx, struct ubus_subscriber *obj, uint32_t id);
 
 /* ----------- rpc ----------- */