X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=liblttng-ust%2Flttng-counter-client-percpu-32-modular.c;fp=liblttng-ust%2Flttng-counter-client-percpu-32-modular.c;h=86fa1164868bfb2b41cca3c94daa1e0f9e958df9;hb=ebabbf580131acd1fe246c4d31fc5c044d36a038;hp=0000000000000000000000000000000000000000;hpb=d37ecb3fc622dee6f80f84c21f38d32eef407262;p=deliverable%2Flttng-ust.git

diff --git a/liblttng-ust/lttng-counter-client-percpu-32-modular.c b/liblttng-ust/lttng-counter-client-percpu-32-modular.c
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+/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
+ *
+ * lttng-counter-client-percpu-32-modular.c
+ *
+ * LTTng lib counter client. Per-cpu 32-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_32_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-32-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_32_modular_init(void)
+{
+	lttng_counter_transport_register(&lttng_counter_transport);
+}
+
+void lttng_counter_client_percpu_32_modular_exit(void)
+{
+	lttng_counter_transport_unregister(&lttng_counter_transport);
+}