[lttng-tools.git] / src / common / evaluation.c

/*
 * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License, version 2.1 only,
 * as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <lttng/condition/evaluation-internal.h>
#include <lttng/condition/buffer-usage-internal.h>
#include <lttng/condition/session-consumed-size-internal.h>
#include <common/macros.h>
#include <common/error.h>
#include <stdbool.h>
#include <assert.h>

LTTNG_HIDDEN
int lttng_evaluation_serialize(struct lttng_evaluation *evaluation,
		struct lttng_dynamic_buffer *buf)
{
	int ret;
	struct lttng_evaluation_comm evaluation_comm = {
		.type = (int8_t) evaluation->type
	};

	ret = lttng_dynamic_buffer_append(buf, &evaluation_comm,
			sizeof(evaluation_comm));
	if (ret) {
		goto end;
	}

	if (evaluation->serialize) {
		ret = evaluation->serialize(evaluation, buf);
		if (ret) {
			goto end;
		}
	}
end:
	return ret;
}

LTTNG_HIDDEN
ssize_t lttng_evaluation_create_from_buffer(
		const struct lttng_buffer_view *src_view,
		struct lttng_evaluation **evaluation)
{
	ssize_t ret, evaluation_size = 0;
	const struct lttng_evaluation_comm *evaluation_comm;
	const struct lttng_buffer_view evaluation_view =
			lttng_buffer_view_from_view(src_view,
			sizeof(*evaluation_comm), -1);

	if (!src_view || !evaluation) {
		ret = -1;
		goto end;
	}

	evaluation_comm = (const struct lttng_evaluation_comm *) src_view->data;
	evaluation_size += sizeof(*evaluation_comm);

	switch ((enum lttng_condition_type) evaluation_comm->type) {
	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
		ret = lttng_evaluation_buffer_usage_low_create_from_buffer(
				&evaluation_view, evaluation);
		if (ret < 0) {
			goto end;
		}
		evaluation_size += ret;
		break;
	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
		ret = lttng_evaluation_buffer_usage_high_create_from_buffer(
				&evaluation_view, evaluation);
		if (ret < 0) {
			goto end;
		}
		evaluation_size += ret;
		break;
	case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
		ret = lttng_evaluation_session_consumed_size_create_from_buffer(
				&evaluation_view, evaluation);
		if (ret < 0) {
			goto end;
		}
		evaluation_size += ret;
		break;
	default:
		ERR("Attempted to create evaluation of unknown type (%i)",
				(int) evaluation_comm->type);
		ret = -1;
		goto end;
	}
	ret = evaluation_size;
end:
	return ret;
}

enum lttng_condition_type lttng_evaluation_get_type(
		const struct lttng_evaluation *evaluation)
{
	return evaluation ? evaluation->type : LTTNG_CONDITION_TYPE_UNKNOWN;
}

void lttng_evaluation_destroy(struct lttng_evaluation *evaluation)
{
	if (!evaluation) {
		return;
	}

	assert(evaluation->destroy);
	evaluation->destroy(evaluation);
}
Commit	Line	Data
a58c490f JG	1	/*
	2	* Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
	3	*
	4	* This library is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU Lesser General Public License, version 2.1 only,
	6	* as published by the Free Software Foundation.
	7	*
	8	* This library is distributed in the hope that it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
	11	* for more details.
	12	*
	13	* You should have received a copy of the GNU Lesser General Public License
	14	* along with this library; if not, write to the Free Software Foundation,
	15	* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	16	*/
	17
	18	#include <lttng/condition/evaluation-internal.h>
	19	#include <lttng/condition/buffer-usage-internal.h>
e8360425	20	#include <lttng/condition/session-consumed-size-internal.h>
a58c490f JG	21	#include <common/macros.h>
	22	#include <common/error.h>
	23	#include <stdbool.h>
	24	#include <assert.h>
	25
	26	LTTNG_HIDDEN
3647288f JG	27	int lttng_evaluation_serialize(struct lttng_evaluation *evaluation,
3647288f JG	28	struct lttng_dynamic_buffer *buf)
a58c490f	29	{
3647288f	30	int ret;
db315d75 JG	31	struct lttng_evaluation_comm evaluation_comm = {
	32	.type = (int8_t) evaluation->type
	33	};
a58c490f	34
3647288f JG	35	ret = lttng_dynamic_buffer_append(buf, &evaluation_comm,
	36	sizeof(evaluation_comm));
	37	if (ret) {
	38	goto end;
a58c490f	39	}
a58c490f JG	40
a58c490f JG	41	if (evaluation->serialize) {
3647288f JG	42	ret = evaluation->serialize(evaluation, buf);
3647288f JG	43	if (ret) {
a58c490f JG	44	goto end;
a58c490f JG	45	}
a58c490f	46	}
a58c490f JG	47	end:
	48	return ret;
	49	}
	50
	51	LTTNG_HIDDEN
	52	ssize_t lttng_evaluation_create_from_buffer(
	53	const struct lttng_buffer_view *src_view,
	54	struct lttng_evaluation **evaluation)
	55	{
	56	ssize_t ret, evaluation_size = 0;
	57	const struct lttng_evaluation_comm *evaluation_comm;
	58	const struct lttng_buffer_view evaluation_view =
	59	lttng_buffer_view_from_view(src_view,
	60	sizeof(*evaluation_comm), -1);
	61
	62	if (!src_view \|\| !evaluation) {
	63	ret = -1;
	64	goto end;
	65	}
	66
	67	evaluation_comm = (const struct lttng_evaluation_comm *) src_view->data;
	68	evaluation_size += sizeof(*evaluation_comm);
	69
	70	switch ((enum lttng_condition_type) evaluation_comm->type) {
	71	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
	72	ret = lttng_evaluation_buffer_usage_low_create_from_buffer(
	73	&evaluation_view, evaluation);
	74	if (ret < 0) {
	75	goto end;
	76	}
	77	evaluation_size += ret;
	78	break;
	79	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
	80	ret = lttng_evaluation_buffer_usage_high_create_from_buffer(
	81	&evaluation_view, evaluation);
	82	if (ret < 0) {
	83	goto end;
	84	}
	85	evaluation_size += ret;
	86	break;
e8360425 JD	87	case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
	88	ret = lttng_evaluation_session_consumed_size_create_from_buffer(
	89	&evaluation_view, evaluation);
	90	if (ret < 0) {
	91	goto end;
	92	}
	93	evaluation_size += ret;
	94	break;
a58c490f JG	95	default:
	96	ERR("Attempted to create evaluation of unknown type (%i)",
	97	(int) evaluation_comm->type);
	98	ret = -1;
	99	goto end;
	100	}
	101	ret = evaluation_size;
	102	end:
	103	return ret;
	104	}
	105
	106	enum lttng_condition_type lttng_evaluation_get_type(
	107	const struct lttng_evaluation *evaluation)
	108	{
	109	return evaluation ? evaluation->type : LTTNG_CONDITION_TYPE_UNKNOWN;
	110	}
	111
	112	void lttng_evaluation_destroy(struct lttng_evaluation *evaluation)
	113	{
	114	if (!evaluation) {
	115	return;
	116	}
	117
	118	assert(evaluation->destroy);
	119	evaluation->destroy(evaluation);
	120	}