src/bin/lttng-sessiond/tracker.h

   1 /*
   2  * Copyright (C) 2018 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #ifndef _LTT_TRACKER_H
   9 #define _LTT_TRACKER_H
  10
  11 #include <lttng/tracker.h>
  12 #include <urcu.h>
  13 #include <urcu/list.h>
  14 #include <urcu/rculfhash.h>
  15
  16 enum lttng_tracker_list_state {
  17         LTTNG_TRACK_ALL,
  18         LTTNG_TRACK_NONE,
  19         LTTNG_TRACK_LIST,
  20 };
  21
  22 /* Tracker ID */
  23 struct lttng_tracker_list_node {
  24         struct lttng_tracker_id *id;
  25
  26         struct cds_list_head list_node;
  27         struct cds_lfht_node ht_node;
  28         struct rcu_head rcu_head;
  29 };
  30
  31 struct lttng_tracker_list {
  32         struct cds_list_head list_head;
  33         /* Hash table for O(1) removal lookup. */
  34         struct cds_lfht *ht;
  35         enum lttng_tracker_list_state state;
  36 };
  37
  38 struct lttng_tracker_list *lttng_tracker_list_create(void);
  39 void lttng_tracker_list_destroy(struct lttng_tracker_list *tracker_list);
  40
  41 int lttng_tracker_list_add(struct lttng_tracker_list *tracker_list,
  42                 const struct lttng_tracker_id *id);
  43 int lttng_tracker_list_remove(struct lttng_tracker_list *tracker_list,
  44                 const struct lttng_tracker_id *id);
  45
  46 int lttng_tracker_id_lookup_string(enum lttng_tracker_type tracker_type,
  47                 const struct lttng_tracker_id *id,
  48                 int *result);
  49 int lttng_tracker_id_get_list(const struct lttng_tracker_list *tracker_list,
  50                 struct lttng_tracker_ids **_ids);
  51 int lttng_tracker_id_set_list(struct lttng_tracker_list *tracker_list,
  52                 const struct lttng_tracker_ids *_ids);
  53
  54 #endif /* _LTT_TRACKER_H */