+/*
+ * Add context to event(s) for a specific channel (or for all).
+ *
+ * If event_name is NULL, the context 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 context is applied to all events of all channels.
+ */
+extern int lttng_add_context(struct lttng_handle *handle,
+ struct lttng_event_context *ctx, const char *event_name,
+ const char *channel_name);
+
+/*
+ * Create or enable an event (or events) for a channel.
+ *
+ * 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.
+ * If channel_name is NULL, the default channel is used (channel0).
+ */
+extern int lttng_enable_event(struct lttng_handle *handle,
+ struct lttng_event *ev, const char *channel_name);
+
+/*
+ * Apply a filter expression to an event.
+ *
+ * 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.
+ */
+extern int lttng_set_event_filter(struct lttng_handle *handle,
+ const char *event_name,
+ const char *channel_name,
+ const char *filter_expression);
+/*
+ * Create or enable a channel.
+ * The channel name cannot be NULL.
+ */
+extern int lttng_enable_channel(struct lttng_handle *handle,
+ struct lttng_channel *chan);
+
+/*
+ * Disable event(s) of a channel and domain.
+ *
+ * If event_name is NULL, all events are disabled.
+ * If channel_name is NULL, the default channel is used (channel0).
+ */
+extern int lttng_disable_event(struct lttng_handle *handle,
+ const char *name, const char *channel_name);