[lttng-tools.git] / src / common / hashtable / hashtable.h

/*
 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 */

#ifndef _LTT_HT_H
#define _LTT_HT_H

#include <urcu.h>
#include <stdint.h>

#include <common/macros.h>
#include <lttng/lttng-export.h>
#include <urcu/rculfhash.h>

#ifdef __cplusplus
extern "C" {
#endif

LTTNG_EXPORT extern unsigned long lttng_ht_seed;

typedef unsigned long (*hash_fct_type)(const void *_key, unsigned long seed);
typedef cds_lfht_match_fct hash_match_fct;

enum lttng_ht_type {
	LTTNG_HT_TYPE_STRING,
	LTTNG_HT_TYPE_ULONG,
	LTTNG_HT_TYPE_U64,
	LTTNG_HT_TYPE_TWO_U64,
};

struct lttng_ht {
	struct cds_lfht *ht;
	cds_lfht_match_fct match_fct;
	hash_fct_type hash_fct;
};

struct lttng_ht_iter {
	struct cds_lfht_iter iter;
};

struct lttng_ht_node_str {
	char *key;
	struct cds_lfht_node node;
	struct rcu_head head;
};

struct lttng_ht_node_ulong {
	unsigned long key;
	struct cds_lfht_node node;
	struct rcu_head head;
};

struct lttng_ht_node_u64 {
	uint64_t key;
	struct cds_lfht_node node;
	struct rcu_head head;
};

struct lttng_ht_two_u64 {
	uint64_t key1;
	uint64_t key2;
};

struct lttng_ht_node_two_u64 {
	struct lttng_ht_two_u64 key;
	struct cds_lfht_node node;
	struct rcu_head head;
};

/* Hashtable new and destroy */
struct lttng_ht *lttng_ht_new(unsigned long size, int type);
void lttng_ht_destroy(struct lttng_ht *ht);

/* Specialized node init and free functions */
void lttng_ht_node_init_str(struct lttng_ht_node_str *node, char *key);
void lttng_ht_node_init_ulong(struct lttng_ht_node_ulong *node,
		unsigned long key);
void lttng_ht_node_init_u64(struct lttng_ht_node_u64 *node,
		uint64_t key);
void lttng_ht_node_init_two_u64(struct lttng_ht_node_two_u64 *node,
		uint64_t key1, uint64_t key2);
void lttng_ht_node_free_str(struct lttng_ht_node_str *node);
void lttng_ht_node_free_ulong(struct lttng_ht_node_ulong *node);
void lttng_ht_node_free_u64(struct lttng_ht_node_u64 *node);
void lttng_ht_node_free_two_u64(struct lttng_ht_node_two_u64 *node);

void lttng_ht_lookup(struct lttng_ht *ht, const void *key,
		struct lttng_ht_iter *iter);

/* Specialized add unique functions */
void lttng_ht_add_unique_str(struct lttng_ht *ht,
		struct lttng_ht_node_str *node);
void lttng_ht_add_unique_ulong(struct lttng_ht *ht,
		struct lttng_ht_node_ulong *node);
void lttng_ht_add_unique_u64(struct lttng_ht *ht,
		struct lttng_ht_node_u64 *node);
void lttng_ht_add_unique_two_u64(struct lttng_ht *ht,
		struct lttng_ht_node_two_u64 *node);
struct lttng_ht_node_ulong *lttng_ht_add_replace_ulong(
		struct lttng_ht *ht, struct lttng_ht_node_ulong *node);
struct lttng_ht_node_u64 *lttng_ht_add_replace_u64(
		struct lttng_ht *ht, struct lttng_ht_node_u64 *node);
void lttng_ht_add_str(struct lttng_ht *ht,
		struct lttng_ht_node_str *node);
void lttng_ht_add_ulong(struct lttng_ht *ht,
		struct lttng_ht_node_ulong *node);
void lttng_ht_add_u64(struct lttng_ht *ht,
		struct lttng_ht_node_u64 *node);

int lttng_ht_del(struct lttng_ht *ht, struct lttng_ht_iter *iter);

void lttng_ht_get_first(struct lttng_ht *ht,
		struct lttng_ht_iter *iter);
void lttng_ht_get_next(struct lttng_ht *ht, struct lttng_ht_iter *iter);

unsigned long lttng_ht_get_count(struct lttng_ht *ht);

struct lttng_ht_node_str *lttng_ht_iter_get_node_str(
		struct lttng_ht_iter *iter);
struct lttng_ht_node_ulong *lttng_ht_iter_get_node_ulong(
		struct lttng_ht_iter *iter);
struct lttng_ht_node_u64 *lttng_ht_iter_get_node_u64(
		struct lttng_ht_iter *iter);
struct lttng_ht_node_two_u64 *lttng_ht_iter_get_node_two_u64(
		struct lttng_ht_iter *iter);

#ifdef __cplusplus
}
#endif

#endif /* _LTT_HT_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
	3	*
	4	* SPDX-License-Identifier: GPL-2.0-only
	5	*
	6	*/
	7
	8	#ifndef _LTT_HT_H
	9	#define _LTT_HT_H
	10
	11	#include <urcu.h>
	12	#include <stdint.h>
	13
	14	#include <common/macros.h>
	15	#include <lttng/lttng-export.h>
	16	#include <urcu/rculfhash.h>
	17
	18	#ifdef __cplusplus
	19	extern "C" {
	20	#endif
	21
	22	LTTNG_EXPORT extern unsigned long lttng_ht_seed;
	23
	24	typedef unsigned long (hash_fct_type)(const void _key, unsigned long seed);
	25	typedef cds_lfht_match_fct hash_match_fct;
	26
	27	enum lttng_ht_type {
	28	LTTNG_HT_TYPE_STRING,
	29	LTTNG_HT_TYPE_ULONG,
	30	LTTNG_HT_TYPE_U64,
	31	LTTNG_HT_TYPE_TWO_U64,
	32	};
	33
	34	struct lttng_ht {
	35	struct cds_lfht *ht;
	36	cds_lfht_match_fct match_fct;
	37	hash_fct_type hash_fct;
	38	};
	39
	40	struct lttng_ht_iter {
	41	struct cds_lfht_iter iter;
	42	};
	43
	44	struct lttng_ht_node_str {
	45	char *key;
	46	struct cds_lfht_node node;
	47	struct rcu_head head;
	48	};
	49
	50	struct lttng_ht_node_ulong {
	51	unsigned long key;
	52	struct cds_lfht_node node;
	53	struct rcu_head head;
	54	};
	55
	56	struct lttng_ht_node_u64 {
	57	uint64_t key;
	58	struct cds_lfht_node node;
	59	struct rcu_head head;
	60	};
	61
	62	struct lttng_ht_two_u64 {
	63	uint64_t key1;
	64	uint64_t key2;
	65	};
	66
	67	struct lttng_ht_node_two_u64 {
	68	struct lttng_ht_two_u64 key;
	69	struct cds_lfht_node node;
	70	struct rcu_head head;
	71	};
	72
	73	/* Hashtable new and destroy */
	74	struct lttng_ht *lttng_ht_new(unsigned long size, int type);
	75	void lttng_ht_destroy(struct lttng_ht *ht);
	76
	77	/* Specialized node init and free functions */
	78	void lttng_ht_node_init_str(struct lttng_ht_node_str node, char key);
	79	void lttng_ht_node_init_ulong(struct lttng_ht_node_ulong *node,
	80	unsigned long key);
	81	void lttng_ht_node_init_u64(struct lttng_ht_node_u64 *node,
	82	uint64_t key);
	83	void lttng_ht_node_init_two_u64(struct lttng_ht_node_two_u64 *node,
	84	uint64_t key1, uint64_t key2);
	85	void lttng_ht_node_free_str(struct lttng_ht_node_str *node);
	86	void lttng_ht_node_free_ulong(struct lttng_ht_node_ulong *node);
	87	void lttng_ht_node_free_u64(struct lttng_ht_node_u64 *node);
	88	void lttng_ht_node_free_two_u64(struct lttng_ht_node_two_u64 *node);
	89
	90	void lttng_ht_lookup(struct lttng_ht ht, const void key,
	91	struct lttng_ht_iter *iter);
	92
	93	/* Specialized add unique functions */
	94	void lttng_ht_add_unique_str(struct lttng_ht *ht,
	95	struct lttng_ht_node_str *node);
	96	void lttng_ht_add_unique_ulong(struct lttng_ht *ht,
	97	struct lttng_ht_node_ulong *node);
	98	void lttng_ht_add_unique_u64(struct lttng_ht *ht,
	99	struct lttng_ht_node_u64 *node);
	100	void lttng_ht_add_unique_two_u64(struct lttng_ht *ht,
	101	struct lttng_ht_node_two_u64 *node);
	102	struct lttng_ht_node_ulong *lttng_ht_add_replace_ulong(
	103	struct lttng_ht ht, struct lttng_ht_node_ulong node);
	104	struct lttng_ht_node_u64 *lttng_ht_add_replace_u64(
	105	struct lttng_ht ht, struct lttng_ht_node_u64 node);
	106	void lttng_ht_add_str(struct lttng_ht *ht,
	107	struct lttng_ht_node_str *node);
	108	void lttng_ht_add_ulong(struct lttng_ht *ht,
	109	struct lttng_ht_node_ulong *node);
	110	void lttng_ht_add_u64(struct lttng_ht *ht,
	111	struct lttng_ht_node_u64 *node);
	112
	113	int lttng_ht_del(struct lttng_ht ht, struct lttng_ht_iter iter);
	114
	115	void lttng_ht_get_first(struct lttng_ht *ht,
	116	struct lttng_ht_iter *iter);
	117	void lttng_ht_get_next(struct lttng_ht ht, struct lttng_ht_iter iter);
	118
	119	unsigned long lttng_ht_get_count(struct lttng_ht *ht);
	120
	121	struct lttng_ht_node_str *lttng_ht_iter_get_node_str(
	122	struct lttng_ht_iter *iter);
	123	struct lttng_ht_node_ulong *lttng_ht_iter_get_node_ulong(
	124	struct lttng_ht_iter *iter);
	125	struct lttng_ht_node_u64 *lttng_ht_iter_get_node_u64(
	126	struct lttng_ht_iter *iter);
	127	struct lttng_ht_node_two_u64 *lttng_ht_iter_get_node_two_u64(
	128	struct lttng_ht_iter *iter);
	129
	130	#ifdef __cplusplus
	131	}
	132	#endif
	133
	134	#endif /* _LTT_HT_H */