LTTNG_TRIGGER_STATUS_PERMISSION_DENIED = -6,
};
-enum lttng_trigger_firing_policy {
- LTTNG_TRIGGER_FIRING_POLICY_EVERY_N = 0,
- LTTNG_TRIGGER_FIRING_POLICY_ONCE_AFTER_N = 1,
-};
-
/*
* Create a trigger object associating a condition and an action.
*
* in the emission of a notification to clients listening through
* notification channels.
*
- * The caller retains the ownership of both the condition and action
- * and both must be kept alive for the lifetime of the trigger object.
+ * Prior to 2.13, the caller had to retain the ownership of both the condition
+ * and action. Both objects had to be kept alive for the lifetime of the trigger
+ * object. This is no longer the case as the condition and action objects are
+ * internally reference counted. It is safe to destroy a condition and an action
+ * after using them to create a trigger. However, they should no longer be used.
+ *
+ * If the action is a notification action with capture descriptors,
+ * the condition must be an event rule condition.
*
* A trigger must be registered in order to become activate and can
* be destroyed after its registration.
extern struct lttng_condition *lttng_trigger_get_condition(
struct lttng_trigger *trigger);
+const struct lttng_condition *lttng_trigger_get_const_condition(
+ const struct lttng_trigger *trigger);
+
/*
* Get the action of a trigger.
*
extern struct lttng_action *lttng_trigger_get_action(
struct lttng_trigger *trigger);
+const struct lttng_action *lttng_trigger_get_const_action(
+ const struct lttng_trigger *trigger);
/*
* Get the name of a trigger.
extern enum lttng_trigger_status lttng_trigger_set_name(
struct lttng_trigger *trigger, const char *name);
-/*
- * Set the trigger firing policy.
- *
- * This is optional. By default a trigger is set to fire each time the
- * associated condition occurs.
- *
- * Threshold is the number of times the condition must be hit before the policy
- * is enacted.
- *
- * Return LTTNG_TRIGGER_STATUS_OK on success, LTTNG_TRIGGER_STATUS_INVALID
- * if invalid parameters are passed.
- */
-extern enum lttng_trigger_status lttng_trigger_set_firing_policy(
- struct lttng_trigger *trigger,
- enum lttng_trigger_firing_policy policy_type,
- uint64_t threshold);
-
-/*
- * Get the trigger firing policy.
- *
- * Threshold is the number of time the condition must be hit before the policy is
- * enacted.
- *
- * Return LTTNG_TRIGGER_STATUS_OK on success, LTTNG_TRIGGER_STATUS_INVALID
- * if invalid parameters are passed.
- */
-extern enum lttng_trigger_status lttng_trigger_get_firing_policy(
- const struct lttng_trigger *trigger,
- enum lttng_trigger_firing_policy *policy_type,
- uint64_t *threshold);
-
/*
* Destroy (frees) a trigger object.
*/
*
* Return 0 on success, a negative LTTng error code on error.
*/
-extern int lttng_unregister_trigger(struct lttng_trigger *trigger);
+extern int lttng_unregister_trigger(const struct lttng_trigger *trigger);
/*
* List triggers for the current user.