lib: Add functions to borrow specialized component classes from specialized components

[babeltrace.git] / include / babeltrace / graph / component-sink-const.h

diff --git a/include/babeltrace/graph/component-sink-const.h b/include/babeltrace/graph/component-sink-const.h
index 0fece9ce253124e0c3c4edaf477ff560d8a91d39..5ce6798284d8e742ea1a2205b3fced8890245d4a 100644 (file)
--- a/include/babeltrace/graph/component-sink-const.h
+++ b/include/babeltrace/graph/component-sink-const.h
@@ -26,7 +26,10 @@
 
 #include <stdint.h>
 
-/* For bt_component, bt_component_filter, bt_port_input */
+/*
+ * For bt_component, bt_component_filter, bt_port_input,
+ * __BT_UPCAST_CONST, bt_component_class_sink
+ */
 #include <babeltrace/types.h>
 
 #ifdef __cplusplus
@@ -37,9 +40,13 @@ static inline
 const bt_component *bt_component_sink_as_component_const(
                const bt_component_sink *component)
 {
-       return (const void *) component;
+       return __BT_UPCAST_CONST(bt_component, component);
 }
 
+extern const bt_component_class_sink *
+bt_component_sink_borrow_class_const(
+               const bt_component_sink *component);
+
 extern uint64_t bt_component_sink_get_input_port_count(
                const bt_component_sink *component);