X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=include%2Fbabeltrace%2Fctf-ir%2Ftrace-internal.h;h=8b6c1f5a45ec6e99850b3c0de3a9478bb91a56e5;hb=5acf2ae6bdfb2bc6fa88e250a87ccc6ba3546d89;hp=d332a581049d9cf798af161c3597ca4be5a60a8d;hpb=c9d90a342899db7aa095b06d15728f24b89e9a2b;p=babeltrace.git

diff --git a/include/babeltrace/ctf-ir/trace-internal.h b/include/babeltrace/ctf-ir/trace-internal.h
index d332a581..8b6c1f5a 100644
--- a/include/babeltrace/ctf-ir/trace-internal.h
+++ b/include/babeltrace/ctf-ir/trace-internal.h
@@ -67,6 +67,7 @@ struct bt_ctf_trace {
 	 */
 	int valid;
 	GPtrArray *listeners; /* Array of struct listener_wrapper */
+	bool is_static;
 };
 
 struct metadata_context {
@@ -89,4 +90,35 @@ BT_HIDDEN
 bool bt_ctf_trace_has_clock_class(struct bt_ctf_trace *trace,
 		struct bt_ctf_clock_class *clock_class);
 
+/**
+@brief	User function type to use with bt_ctf_trace_add_listener().
+
+@param[in] obj	New CTF IR object which is part of the trace
+		class hierarchy.
+@param[in] data	User data.
+
+@prenotnull{obj}
+*/
+typedef void (*bt_ctf_listener_cb)(struct bt_ctf_object *obj, void *data);
+
+/**
+@brief	Adds the trace class modification listener \p listener to
+	the CTF IR trace class \p trace_class.
+
+Once you add \p listener to \p trace_class, whenever \p trace_class
+is modified, \p listener is called with the new element and with
+\p data (user data).
+
+@param[in] trace_class	Trace class to which to add \p listener.
+@param[in] listener	Modification listener function.
+@param[in] data		User data.
+@returns		0 on success, or a negative value on error.
+
+@prenotnull{trace_class}
+@prenotnull{listener}
+@postrefcountsame{trace_class}
+*/
+extern int bt_ctf_trace_add_listener(struct bt_ctf_trace *trace_class,
+		bt_ctf_listener_cb listener, void *data);
+
 #endif /* BABELTRACE_CTF_IR_TRACE_INTERNAL_H */