Cleanup: remove duplicated implementation of rculfhash
[lttng-tools.git] / src / common / hashtable / hashtable.h
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1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
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4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
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7 *
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
d14d33bf 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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11 * more details.
12 *
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13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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16 */
17
18#ifndef _LTT_HT_H
19#define _LTT_HT_H
20
21#include <urcu.h>
d88aee68 22#include <stdint.h>
10a8a223 23
d604af56 24#include <common/macros.h>
8684af09 25#include <urcu/rculfhash.h>
bec39940 26
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27extern unsigned long lttng_ht_seed;
28
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29typedef unsigned long (*hash_fct)(void *_key, unsigned long seed);
30typedef cds_lfht_match_fct hash_match_fct;
31
32enum lttng_ht_type {
33 LTTNG_HT_TYPE_STRING,
34 LTTNG_HT_TYPE_ULONG,
d88aee68 35 LTTNG_HT_TYPE_U64,
3c4599b9 36 LTTNG_HT_TYPE_TWO_U64,
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37};
38
39struct lttng_ht {
40 struct cds_lfht *ht;
41 cds_lfht_match_fct match_fct;
42 hash_fct hash_fct;
43};
44
45struct lttng_ht_iter {
46 struct cds_lfht_iter iter;
47};
48
49struct lttng_ht_node_str {
50 char *key;
51 struct cds_lfht_node node;
52 struct rcu_head head;
53};
54
55struct lttng_ht_node_ulong {
56 unsigned long key;
57 struct cds_lfht_node node;
58 struct rcu_head head;
59};
60
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61struct lttng_ht_node_u64 {
62 uint64_t key;
63 struct cds_lfht_node node;
64 struct rcu_head head;
65};
66
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67struct lttng_ht_two_u64 {
68 uint64_t key1;
69 uint64_t key2;
70};
71
72struct lttng_ht_node_two_u64 {
73 struct lttng_ht_two_u64 key;
74 struct cds_lfht_node node;
75 struct rcu_head head;
76};
77
bec39940 78/* Hashtable new and destroy */
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79LTTNG_HIDDEN
80struct lttng_ht *lttng_ht_new(unsigned long size, int type);
81LTTNG_HIDDEN
82void lttng_ht_destroy(struct lttng_ht *ht);
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83
84/* Specialized node init and free functions */
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85LTTNG_HIDDEN
86void lttng_ht_node_init_str(struct lttng_ht_node_str *node, char *key);
87LTTNG_HIDDEN
88void lttng_ht_node_init_ulong(struct lttng_ht_node_ulong *node,
bec39940 89 unsigned long key);
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90LTTNG_HIDDEN
91void lttng_ht_node_init_u64(struct lttng_ht_node_u64 *node,
d88aee68 92 uint64_t key);
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93LTTNG_HIDDEN
94void lttng_ht_node_init_two_u64(struct lttng_ht_node_two_u64 *node,
3c4599b9 95 uint64_t key1, uint64_t key2);
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96LTTNG_HIDDEN
97void lttng_ht_node_free_str(struct lttng_ht_node_str *node);
98LTTNG_HIDDEN
99void lttng_ht_node_free_ulong(struct lttng_ht_node_ulong *node);
100LTTNG_HIDDEN
101void lttng_ht_node_free_u64(struct lttng_ht_node_u64 *node);
102LTTNG_HIDDEN
103void lttng_ht_node_free_two_u64(struct lttng_ht_node_two_u64 *node);
104
105LTTNG_HIDDEN
106void lttng_ht_lookup(struct lttng_ht *ht, void *key,
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107 struct lttng_ht_iter *iter);
108
109/* Specialized add unique functions */
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110LTTNG_HIDDEN
111void lttng_ht_add_unique_str(struct lttng_ht *ht,
bec39940 112 struct lttng_ht_node_str *node);
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113LTTNG_HIDDEN
114void lttng_ht_add_unique_ulong(struct lttng_ht *ht,
bec39940 115 struct lttng_ht_node_ulong *node);
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116LTTNG_HIDDEN
117void lttng_ht_add_unique_u64(struct lttng_ht *ht,
d88aee68 118 struct lttng_ht_node_u64 *node);
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119LTTNG_HIDDEN
120void lttng_ht_add_unique_two_u64(struct lttng_ht *ht,
3c4599b9 121 struct lttng_ht_node_two_u64 *node);
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122LTTNG_HIDDEN
123struct lttng_ht_node_ulong *lttng_ht_add_replace_ulong(
852d0037 124 struct lttng_ht *ht, struct lttng_ht_node_ulong *node);
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125LTTNG_HIDDEN
126struct lttng_ht_node_u64 *lttng_ht_add_replace_u64(
d88aee68 127 struct lttng_ht *ht, struct lttng_ht_node_u64 *node);
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128LTTNG_HIDDEN
129void lttng_ht_add_str(struct lttng_ht *ht,
efa116c6 130 struct lttng_ht_node_str *node);
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131LTTNG_HIDDEN
132void lttng_ht_add_ulong(struct lttng_ht *ht,
aefea3b7 133 struct lttng_ht_node_ulong *node);
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134LTTNG_HIDDEN
135void lttng_ht_add_u64(struct lttng_ht *ht,
d88aee68 136 struct lttng_ht_node_u64 *node);
bec39940 137
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138LTTNG_HIDDEN
139int lttng_ht_del(struct lttng_ht *ht, struct lttng_ht_iter *iter);
bec39940 140
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141LTTNG_HIDDEN
142void lttng_ht_get_first(struct lttng_ht *ht,
bec39940 143 struct lttng_ht_iter *iter);
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144LTTNG_HIDDEN
145void lttng_ht_get_next(struct lttng_ht *ht, struct lttng_ht_iter *iter);
bec39940 146
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147LTTNG_HIDDEN
148unsigned long lttng_ht_get_count(struct lttng_ht *ht);
bec39940 149
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150LTTNG_HIDDEN
151struct lttng_ht_node_str *lttng_ht_iter_get_node_str(
bec39940 152 struct lttng_ht_iter *iter);
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153LTTNG_HIDDEN
154struct lttng_ht_node_ulong *lttng_ht_iter_get_node_ulong(
bec39940 155 struct lttng_ht_iter *iter);
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156LTTNG_HIDDEN
157struct lttng_ht_node_u64 *lttng_ht_iter_get_node_u64(
d88aee68 158 struct lttng_ht_iter *iter);
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159LTTNG_HIDDEN
160struct lttng_ht_node_two_u64 *lttng_ht_iter_get_node_two_u64(
3c4599b9 161 struct lttng_ht_iter *iter);
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162
163#endif /* _LTT_HT_H */
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