trigger: implement trigger naming
[lttng-tools.git] / src / bin / lttng-sessiond / notification-thread.h
index 134804f9d0718a76415e898f556e612921c95f9f..4e1ca4b8011fc3392394a09dc4f3f5303e07ee2c 100644 (file)
@@ -108,9 +108,14 @@ struct notification_thread_handle {
  *             channels through their struct channel_info (ref-counting is used).
  *
  *   - triggers_ht:
- *             associates a condition to a struct lttng_trigger_ht_element.
+ *             associates a trigger to a struct lttng_trigger_ht_element.
  *             The hash table holds the ownership of the
  *             lttng_trigger_ht_elements along with the triggers themselves.
+ *   - triggers_by_name_uid_ht:
+ *             associates a trigger (name, uid) tuple to
+ *             a struct lttng_trigger_ht_element.
+ *             The hash table does not hold any ownership and is used strictly
+ *             for lookup on registration.
  *
  * The thread reacts to the following internal events:
  *   1) creation of a tracing channel,
@@ -154,6 +159,7 @@ struct notification_thread_handle {
  *          notification_trigger_clients_ht,
  *    - add trigger to channel_triggers_ht (if applicable),
  *    - add trigger to session_triggers_ht (if applicable),
+ *    - add trigger to triggers_by_name_uid_ht
  *    - add trigger to triggers_ht
  *    - evaluate the trigger's condition right away to react if that condition
  *      is true from the beginning.
@@ -163,6 +169,7 @@ struct notification_thread_handle {
  *      - remove the trigger from the notification_trigger_clients_ht,
  *    - remove trigger from channel_triggers_ht (if applicable),
  *    - remove trigger from session_triggers_ht (if applicable),
+ *    - remove trigger from triggers_by_name_uid_ht
  *    - remove trigger from triggers_ht
  *
  * 5) Reception of a channel monitor sample from the consumer daemon
@@ -210,6 +217,10 @@ struct notification_thread_state {
        struct cds_lfht *channels_ht;
        struct cds_lfht *sessions_ht;
        struct cds_lfht *triggers_ht;
+       struct cds_lfht *triggers_by_name_uid_ht;
+       struct {
+               uint64_t name_offset;
+       } trigger_id;
        notification_client_id next_notification_client_id;
        struct action_executor *executor;
 };
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