Add the concept of a static trace

[babeltrace.git] / include / babeltrace / ctf-ir / trace-internal.h

diff --git a/include/babeltrace/ctf-ir/trace-internal.h b/include/babeltrace/ctf-ir/trace-internal.h
index 38c89e7b3c8d15756961c7a576fcef093354c587..8b6c1f5a45ec6e99850b3c0de3a9478bb91a56e5 100644 (file)
--- 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 {
@@ -85,4 +86,39 @@ BT_HIDDEN
 int bt_ctf_trace_object_modification(struct bt_ctf_object *object,
                void *trace_ptr);
 
+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 */