[deliverable/lttng-ust.git] / liblttng-ust / lttng-counter-client-percpu-64-modular.c

/* 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"
#include "lttng-tracer-core.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 size_t *max_nr_elem,
					  int64_t global_sum_step,
					  int global_counter_fd,
					  int nr_counter_cpu_fds,
					  const int *counter_cpu_fds,
					  bool is_daemon)
{
	if (nr_dimensions > LTTNG_COUNTER_DIMENSION_MAX)
		return NULL;
	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(&lttng_counter_transport);
}

void lttng_counter_client_percpu_64_modular_exit(void)
{
	lttng_counter_transport_unregister(&lttng_counter_transport);
}
Commit	Line	Data
ebabbf58 MD	1	/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
	2	*
	3	* lttng-counter-client-percpu-64-modular.c
	4	*
	5	* LTTng lib counter client. Per-cpu 64-bit counters in modular
	6	* arithmetic.
	7	*
	8	* Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	9	*/
	10
	11	#include <lttng/ust-events.h>
	12	#include "../libcounter/counter.h"
	13	#include "../libcounter/counter-api.h"
23d128de	14	#include "lttng-tracer-core.h"
ebabbf58 MD	15
	16	static const struct lib_counter_config client_config = {
	17	.alloc = COUNTER_ALLOC_PER_CPU,
	18	.sync = COUNTER_SYNC_PER_CPU,
	19	.arithmetic = COUNTER_ARITHMETIC_MODULAR,
	20	.counter_size = COUNTER_SIZE_64_BIT,
	21	};
	22
	23	static struct lib_counter *counter_create(size_t nr_dimensions,
bb84a1ec	24	const size_t *max_nr_elem,
ebabbf58 MD	25	int64_t global_sum_step,
	26	int global_counter_fd,
	27	int nr_counter_cpu_fds,
	28	const int *counter_cpu_fds,
	29	bool is_daemon)
	30	{
ebabbf58 MD	31	if (nr_dimensions > LTTNG_COUNTER_DIMENSION_MAX)
ebabbf58 MD	32	return NULL;
ebabbf58 MD	33	return lttng_counter_create(&client_config, nr_dimensions, max_nr_elem,
	34	global_sum_step, global_counter_fd, nr_counter_cpu_fds,
	35	counter_cpu_fds, is_daemon);
	36	}
	37
	38	static void counter_destroy(struct lib_counter *counter)
	39	{
	40	lttng_counter_destroy(counter);
	41	}
	42
	43	static int counter_add(struct lib_counter counter, const size_t dimension_indexes, int64_t v)
	44	{
	45	return lttng_counter_add(&client_config, counter, dimension_indexes, v);
	46	}
	47
	48	static int counter_read(struct lib_counter counter, const size_t dimension_indexes, int cpu,
	49	int64_t value, bool overflow, bool *underflow)
	50	{
	51	return lttng_counter_read(&client_config, counter, dimension_indexes, cpu, value,
	52	overflow, underflow);
	53	}
	54
	55	static int counter_aggregate(struct lib_counter counter, const size_t dimension_indexes,
	56	int64_t value, bool overflow, bool *underflow)
	57	{
	58	return lttng_counter_aggregate(&client_config, counter, dimension_indexes, value,
	59	overflow, underflow);
	60	}
	61
	62	static int counter_clear(struct lib_counter counter, const size_t dimension_indexes)
	63	{
	64	return lttng_counter_clear(&client_config, counter, dimension_indexes);
	65	}
	66
	67	static struct lttng_counter_transport lttng_counter_transport = {
	68	.name = "counter-per-cpu-64-modular",
	69	.ops = {
	70	.counter_create = counter_create,
	71	.counter_destroy = counter_destroy,
	72	.counter_add = counter_add,
	73	.counter_read = counter_read,
	74	.counter_aggregate = counter_aggregate,
	75	.counter_clear = counter_clear,
	76	},
	77	.client_config = &client_config,
	78	};
	79
	80	void lttng_counter_client_percpu_64_modular_init(void)
	81	{
	82	lttng_counter_transport_register(&lttng_counter_transport);
	83	}
	84
	85	void lttng_counter_client_percpu_64_modular_exit(void)
	86	{
	87	lttng_counter_transport_unregister(&lttng_counter_transport);
	88	}