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[AGL/documentation.git] / docs / 4_APIs_and_Services / 4.3_Application_Framework_Binder / 3_Binder_references / 5_Functions_of_class_afb_event.md

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+---
+edit_link: ''
+title: Functions of class afb_event
+origin_url: >-
+  https://git.automotivelinux.org/src/app-framework-binder/plain/docs/reference-v3/func-event.md?h=master
+---
+
+<!-- WARNING: This file is generated by fetch_docs.js using /home/boron/Documents/AGL/docs-webtemplate/site/_data/tocs/apis_services/master/app-framework-binder-developer-guides-api-services-book.yml -->
+
+Functions of class **afb_event**
+==============================
+
+## General functions
+
+### afb_event_is_valid
+
+```C
+/**
+ * Checks whether the 'event' is valid or not.
+ *
+ * @param event the event to check
+ *
+ * @return 0 if not valid or 1 if valid.
+ */
+int afb_event_is_valid(
+                       afb_event_t event);
+```
+
+### afb_event_name
+
+```C
+/**
+ * Gets the name associated to 'event'.
+ *
+ * @param event the event whose name is requested
+ *
+ * @return the name of the event
+ *
+ * The returned name can be used until call to 'afb_event_unref'.
+ * It shouldn't be freed.
+ */
+const char *afb_event_name(
+                       afb_event_t event);
+```
+
+### afb_event_unref
+
+```C
+/**
+ * Decrease the count of references to 'event'.
+ * Call this function when the evenid is no more used.
+ * It destroys the event_x2 when the reference count falls to zero.
+ *
+ * @param event the event
+ */
+void afb_event_unref(
+                       afb_event_t event);
+```
+
+### afb_event_addref
+
+```C
+/**
+ * Increases the count of references to 'event'
+ *
+ * @param event the event
+ *
+ * @return the event
+ */
+afb_event_t *afb_event_addref(
+                       afb_event_t event);
+```
+
+## Pushing functions
+
+### afb_event_broadcast
+
+```C
+/**
+ * Broadcasts widely an event of 'event' with the data 'object'.
+ * 'object' can be NULL.
+ *
+ * For convenience, the function calls 'json_object_put' for 'object'.
+ * Thus, in the case where 'object' should remain available after
+ * the function returns, the function 'json_object_get' shall be used.
+ *
+ * @param event the event to broadcast
+ * @param object the companion object to associate to the broadcasted event (can be NULL)
+ *
+ * @return 0 in case of success or -1 in case of error
+ */
+int afb_event_broadcast(
+                       afb_event_t event,
+                       struct json_object *object);
+```
+
+### afb_event_push
+
+```C
+/**
+ * Pushes an event of 'event' with the data 'object' to its observers.
+ * 'object' can be NULL.
+ *
+ * For convenience, the function calls 'json_object_put' for 'object'.
+ * Thus, in the case where 'object' should remain available after
+ * the function returns, the function 'json_object_get' shall be used.
+ *
+ * @param event the event to push
+ * @param object the companion object to associate to the pushed event (can be NULL)
+ *
+ * @Return
+ *   *  1 if at least one client listen for the event
+ *   *  0 if no more client listen for the event
+ *   * -1 in case of error (the event can't be delivered)
+ */
+int afb_event_push(
+                       afb_event_t event,
+                       struct json_object *object);
+```
+