/*
* Stop tracing for *all* registered traces (kernel and user-space).
+ *
+ * This call will wait for data availability for each domain of the session so
+ * this can take an abritrary amount of time. However, when returning you have
+ * the guarantee that the data is ready to be read and analyse. Use the
+ * _no_wait call below to avoid this behavior.
*/
extern int lttng_stop_tracing(const char *session_name);
+/*
+ * Behave exactly like lttng_stop_tracing but does not wait for data
+ * availability.
+ */
+extern int lttng_stop_tracing_no_wait(const char *session_name);
+
/*
* Add context to event(s) for a specific channel (or for all).
*
struct lttng_event *ev, const char *channel_name);
/*
- * Apply a filter expression to an event.
+ * Create or enable an event with a specific filter.
*
- * If event_name is NULL, the filter is applied to all events of the channel.
- * If channel_name is NULL, a lookup of the event's channel is done.
- * If both are NULL, the filter is applied to all events of all channels.
+ * If the event you are trying to enable does not exist, it will be created,
+ * else it is enabled.
+ * If event_name is NULL, all events are enabled with that filter.
+ * If channel_name is NULL, the default channel is used (channel0) and created
+ * if not found.
*/
-extern int lttng_set_event_filter(struct lttng_handle *handle,
- const char *event_name,
- const char *channel_name,
+extern int lttng_enable_event_with_filter(struct lttng_handle *handle,
+ struct lttng_event *event, const char *channel_name,
const char *filter_expression);
+
/*
* Create or enable a channel.
* The channel name cannot be NULL.
/*
* For a given session name, this call checks if the data is ready to be read
- * or is still being extracted by the consumer(s) hence not ready to be used by
- * any readers.
+ * or is still being extracted by the consumer(s) (pending) hence not ready to
+ * be used by any readers.
*
- * Return 0 if the data is _NOT_ available else 1 if the data is ready. On
- * error, a negative value is returned and readable by lttng_strerror().
+ * Return 0 if there is _no_ data pending in the buffers thus having a
+ * guarantee that the data can be read safely. Else, return 1 if there is still
+ * traced data is pending. On error, a negative value is returned and readable
+ * by lttng_strerror().
*/
-extern int lttng_data_available(const char *session_name);
+extern int lttng_data_pending(const char *session_name);
#ifdef __cplusplus
}