ltt_event_create should return error values

[lttng-ust.git] / include / lttng / ust-events.h

diff --git a/include/lttng/ust-events.h b/include/lttng/ust-events.h
index 63162948d67563028a130ba1c833075f6b5b9d21..0ccef46ab33fa8769c0b3fd09424bfd81c4187a0 100644 (file)
--- a/include/lttng/ust-events.h
+++ b/include/lttng/ust-events.h
@@ -195,6 +195,7 @@ struct lttng_probe_desc {
        const struct lttng_event_desc *event_desc;
        unsigned int nr_events;
        struct cds_list_head head;              /* chain registered probes */
+       struct tracepoint_loglevel *loglevels;
 };
 
 struct ust_pending_probe;
@@ -302,6 +303,17 @@ struct ltt_transport {
        struct ltt_channel_ops ops;
 };
 
+struct tracepoint_loglevel_enum_entry  {
+       const char *identifier;
+       long value;
+};
+
+/* mapping between tracepoint and loglevel */
+struct tracepoint_loglevel {
+       const char *name;
+       const struct tracepoint_loglevel_enum_entry *loglevel;
+};
+
 struct ltt_session *ltt_session_create(void);
 int ltt_session_enable(struct ltt_session *session);
 int ltt_session_disable(struct ltt_session *session);
@@ -324,9 +336,10 @@ struct ltt_channel *ltt_global_channel_create(struct ltt_session *session,
                                       int *shm_fd, int *wait_fd,
                                       uint64_t *memory_map_size);
 
-struct ltt_event *ltt_event_create(struct ltt_channel *chan,
-                                  struct lttng_ust_event *event_param,
-                                  void *filter);
+int ltt_event_create(struct ltt_channel *chan,
+               struct lttng_ust_event *event_param,
+               void *filter,
+               struct ltt_event **event);
 
 int ltt_channel_enable(struct ltt_channel *channel);
 int ltt_channel_disable(struct ltt_channel *channel);