SoW-2020-0002: Trace Hit Counters

[deliverable/lttng-ust.git] / liblttng-ust / ust-events-internal.h

diff --git a/liblttng-ust/ust-events-internal.h b/liblttng-ust/ust-events-internal.h
index 807f14f88842933dfb64ac3d3198d092a779b590..16b7b33ff70812a4df799136ba14dc3cafc876c2 100644 (file)
--- a/liblttng-ust/ust-events-internal.h
+++ b/liblttng-ust/ust-events-internal.h
@@ -15,10 +15,29 @@
 #include <helper.h>
 #include <lttng/ust-events.h>
 
+/*
+ * Enabler field, within whatever object is enabling an event. Target of
+ * backward reference.
+ */
+struct lttng_enabler {
+       enum lttng_enabler_format_type format_type;
+
+       /* head list of struct lttng_ust_filter_bytecode_node */
+       struct cds_list_head filter_bytecode_head;
+       /* head list of struct lttng_ust_excluder_node */
+       struct cds_list_head excluder_head;
+
+       struct lttng_ust_event event_param;
+       unsigned int enabled:1;
+
+       uint64_t user_token;            /* User-provided token */
+};
+
 struct lttng_event_enabler {
        struct lttng_enabler base;
        struct cds_list_head node;      /* per-session list of enablers */
-       struct lttng_channel *chan;
+       struct lttng_event_container *container;
+       struct lttng_counter_key key;
        /*
         * Unused, but kept around to make it explicit that the tracer can do
         * it.
@@ -32,7 +51,6 @@ struct lttng_event_notifier_enabler {
        struct cds_list_head node;      /* per-app list of event_notifier enablers */
        struct cds_list_head capture_bytecode_head;
        struct lttng_event_notifier_group *group; /* weak ref */
-       uint64_t user_token;            /* User-provided token */
        uint64_t num_captures;
 };
 
@@ -87,7 +105,8 @@ LTTNG_HIDDEN
 struct lttng_event_enabler *lttng_event_enabler_create(
                enum lttng_enabler_format_type format_type,
                struct lttng_ust_event *event_param,
-               struct lttng_channel *chan);
+               const struct lttng_ust_counter_key *key,
+               struct lttng_event_container *container);
 
 /*
  * Destroy a `struct lttng_event_enabler` object.
@@ -240,6 +259,16 @@ int lttng_fix_pending_event_notifiers(void);
 LTTNG_HIDDEN
 struct lttng_counter *lttng_ust_counter_create(
                const char *counter_transport_name,
-               size_t number_dimensions, const struct lttng_counter_dimension *dimensions);
+               size_t number_dimensions,
+               const size_t *max_nr_elem,
+               int64_t global_sum_step,
+               bool coalesce_hits);
+
+LTTNG_HIDDEN
+struct lttng_counter *lttng_session_create_counter(
+       struct lttng_session *session,
+       const char *counter_transport_name,
+       size_t number_dimensions, const size_t *dimensions_sizes,
+       int64_t global_sum_step, bool coalesce_hits);
 
 #endif /* _LTTNG_UST_EVENTS_INTERNAL_H */