+struct lttng_counter_ops {
+ struct lib_counter *(*counter_create)(size_t nr_dimensions,
+ const size_t *max_nr_elem, /* for each dimension */
+ int64_t global_sum_step);
+ void (*counter_destroy)(struct lib_counter *counter);
+ int (*counter_add)(struct lib_counter *counter, const size_t *dimension_indexes,
+ int64_t v);
+ /*
+ * counter_read reads a specific cpu's counter if @cpu >= 0, or
+ * the global aggregation counter if @cpu == -1.
+ */
+ int (*counter_read)(struct lib_counter *counter, const size_t *dimension_indexes, int cpu,
+ int64_t *value, bool *overflow, bool *underflow);
+ /*
+ * counter_aggregate returns the total sum of all per-cpu counters and
+ * the global aggregation counter.
+ */
+ int (*counter_aggregate)(struct lib_counter *counter, const size_t *dimension_indexes,
+ int64_t *value, bool *overflow, bool *underflow);
+ int (*counter_clear)(struct lib_counter *counter, const size_t *dimension_indexes);
+};
+