--- /dev/null
+/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
+ *
+ * lttng-counter-client-percpu-64-modular.c
+ *
+ * LTTng lib counter client. Per-cpu 64-bit counters in modular
+ * arithmetic.
+ *
+ * Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ */
+
+#include <lttng/ust-events.h>
+#include "../libcounter/counter.h"
+#include "../libcounter/counter-api.h"
+
+static const struct lib_counter_config client_config = {
+ .alloc = COUNTER_ALLOC_PER_CPU,
+ .sync = COUNTER_SYNC_PER_CPU,
+ .arithmetic = COUNTER_ARITHMETIC_MODULAR,
+ .counter_size = COUNTER_SIZE_64_BIT,
+};
+
+static struct lib_counter *counter_create(size_t nr_dimensions,
+ const struct lttng_counter_dimension *dimensions,
+ int64_t global_sum_step,
+ int global_counter_fd,
+ int nr_counter_cpu_fds,
+ const int *counter_cpu_fds,
+ bool is_daemon)
+{
+ size_t max_nr_elem[LTTNG_COUNTER_DIMENSION_MAX], i;
+
+ if (nr_dimensions > LTTNG_COUNTER_DIMENSION_MAX)
+ return NULL;
+ for (i = 0; i < nr_dimensions; i++) {
+ if (dimensions[i].has_underflow || dimensions[i].has_overflow)
+ return NULL;
+ max_nr_elem[i] = dimensions[i].size;
+ }
+ return lttng_counter_create(&client_config, nr_dimensions, max_nr_elem,
+ global_sum_step, global_counter_fd, nr_counter_cpu_fds,
+ counter_cpu_fds, is_daemon);
+}
+
+static void counter_destroy(struct lib_counter *counter)
+{
+ lttng_counter_destroy(counter);
+}
+
+static int counter_add(struct lib_counter *counter, const size_t *dimension_indexes, int64_t v)
+{
+ return lttng_counter_add(&client_config, counter, dimension_indexes, v);
+}
+
+static int counter_read(struct lib_counter *counter, const size_t *dimension_indexes, int cpu,
+ int64_t *value, bool *overflow, bool *underflow)
+{
+ return lttng_counter_read(&client_config, counter, dimension_indexes, cpu, value,
+ overflow, underflow);
+}
+
+static int counter_aggregate(struct lib_counter *counter, const size_t *dimension_indexes,
+ int64_t *value, bool *overflow, bool *underflow)
+{
+ return lttng_counter_aggregate(&client_config, counter, dimension_indexes, value,
+ overflow, underflow);
+}
+
+static int counter_clear(struct lib_counter *counter, const size_t *dimension_indexes)
+{
+ return lttng_counter_clear(&client_config, counter, dimension_indexes);
+}
+
+static struct lttng_counter_transport lttng_counter_transport = {
+ .name = "counter-per-cpu-64-modular",
+ .ops = {
+ .counter_create = counter_create,
+ .counter_destroy = counter_destroy,
+ .counter_add = counter_add,
+ .counter_read = counter_read,
+ .counter_aggregate = counter_aggregate,
+ .counter_clear = counter_clear,
+ },
+ .client_config = &client_config,
+};
+
+void lttng_counter_client_percpu_64_modular_init(void)
+{
+ lttng_counter_transport_register(<tng_counter_transport);
+}
+
+void lttng_counter_client_percpu_64_modular_exit(void)
+{
+ lttng_counter_transport_unregister(<tng_counter_transport);
+}