@sa bt_ctf_event_class_get_attribute_value(): Returns the value of
the attribute of a given event class at a given index.
*/
-extern int bt_ctf_event_class_get_attribute_count(
+extern int64_t bt_ctf_event_class_get_attribute_count(
struct bt_ctf_event_class *event_class);
/**
@prenotnull{event_class}
@postrefcountsame{event_class}
*/
-extern int bt_ctf_event_class_get_field_count(
+extern int64_t bt_ctf_event_class_get_field_count(
struct bt_ctf_event_class *event_class);
/**