Fix: automatic enum value overwrites existing error code value

[lttng-tools.git] / include / lttng / tracker.h

diff --git a/include/lttng/tracker.h b/include/lttng/tracker.h
index a66a2cfce4dea3701fd0cb53fe25329bdd12eb78..7427cf157fa4c076c5181ed76e45d81337c0c56c 100644 (file)
--- a/include/lttng/tracker.h
+++ b/include/lttng/tracker.h
@@ -20,6 +20,7 @@
 
 #include <lttng/constant.h>
 #include <common/macros.h>
+#include <lttng/session.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -49,8 +50,14 @@ enum lttng_tracker_id_status {
        LTTNG_TRACKER_ID_STATUS_UNSET = 1,
 };
 
-struct lttng_handle;
+/*
+ * A tracker id.
+ */
 struct lttng_tracker_id;
+
+/*
+ * A collection of tracker id.
+ */
 struct lttng_tracker_ids;
 
 /*
@@ -101,18 +108,18 @@ extern enum lttng_tracker_id_status lttng_tracker_id_set_all(
                struct lttng_tracker_id *id);
 
 /*
- * Destroys (frees) a tracker id.
+ * Destroy a tracker id.
  */
 extern void lttng_tracker_id_destroy(struct lttng_tracker_id *id);
 
 /*
- * Returns the type of the tracker id.
+ * Get the type of a tracker id.
  */
 extern enum lttng_tracker_id_type lttng_tracker_id_get_type(
                const struct lttng_tracker_id *id);
 
 /*
- * Returns the value of the tracker id.
+ * Get the value of a tracker id.
  *
  * Returns LTTNG_TRACKER_ID_OK on success,
  * LTTNG_TRACKER_ID_STATUS_INVALID when the tracker is not of type
@@ -123,7 +130,7 @@ extern enum lttng_tracker_id_status lttng_tracker_id_get_value(
                const struct lttng_tracker_id *id, int *value);
 
 /*
- * Returns the string representation of the tracker id.
+ * Get the string representation of the tracker id.
  *
  * Returns LTTNG_TRACKER_ID_OK on success,
  * LTTNG_TRACKER_ID_STATUS_INVALID when the tracker is not of type
@@ -157,13 +164,10 @@ extern int lttng_untrack_id(struct lttng_handle *handle,
                const struct lttng_tracker_id *id);
 
 /*
- * List IDs in the tracker.
+ * List IDs of a tracker.
  *
- * tracker_type is the type of tracker.
- * ids is set to an allocated lttng_tracker_ids representing IDs
- * currently tracked.
- * On success, caller is responsible for freeing ids
- * using lttng_tracker_ids_destroy.
+ * On success, ids is allocated.
+ * The ids collection must be freed by the caller with lttng_destroy_ids().
  *
  * Returns 0 on success, else a negative LTTng error code.
  */
@@ -223,8 +227,12 @@ extern const struct lttng_tracker_id *lttng_tracker_ids_get_at_index(
 
 /*
  * Get the number of tracker id in a tracker id list.
+ *
+ * Return LTTNG_TRACKER_ID_STATUS on sucess,
+ * LTTNG_TRACKER_ID_STATUS_INVALID when passed invalid parameters.
  */
-extern int lttng_tracker_ids_get_count(const struct lttng_tracker_ids *ids);
+extern enum lttng_tracker_id_status lttng_tracker_ids_get_count(
+               const struct lttng_tracker_ids *ids, unsigned int *count);
 
 /*
  * Destroy a tracker id list.