[lttng-ust.git] / src / common / events.c

// SPDX-FileCopyrightText: 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
//
// SPDX-License-Identifier: LGPL-2.1-or-later

#include <string.h>

#include "common/events.h"
#include "common/jhash.h"

/*
 * Needed by comm layer.
 */
struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_ust_session *session,
		const struct lttng_ust_enum_desc *enum_desc)
{
	struct lttng_enum *_enum;
	struct cds_hlist_head *head;
	struct cds_hlist_node *node;
	size_t name_len = strlen(enum_desc->name);
	uint32_t hash;

	hash = jhash(enum_desc->name, name_len, 0);
	head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)];
	cds_hlist_for_each_entry(_enum, node, head, hlist) {
		assert(_enum->desc);
		if (_enum->desc == enum_desc)
			return _enum;
	}
	return NULL;
}
Commit	Line	Data
71ca2509 MJ	1	// SPDX-FileCopyrightText: 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	2	//
	3	// SPDX-License-Identifier: LGPL-2.1-or-later
810185f3 MJ	4
	5	#include <string.h>
	6
	7	#include "common/events.h"
	8	#include "common/jhash.h"
	9
	10	/*
	11	* Needed by comm layer.
	12	*/
	13	struct lttng_enum lttng_ust_enum_get_from_desc(struct lttng_ust_session session,
	14	const struct lttng_ust_enum_desc *enum_desc)
	15	{
	16	struct lttng_enum *_enum;
	17	struct cds_hlist_head *head;
	18	struct cds_hlist_node *node;
	19	size_t name_len = strlen(enum_desc->name);
	20	uint32_t hash;
	21
	22	hash = jhash(enum_desc->name, name_len, 0);
	23	head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)];
	24	cds_hlist_for_each_entry(_enum, node, head, hlist) {
	25	assert(_enum->desc);
	26	if (_enum->desc == enum_desc)
	27	return _enum;
	28	}
	29	return NULL;
	30	}