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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> | |
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22 | |
23 | #include "rculfhash.h" | |
24 | #include "rculfhash-internal.h" | |
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26 | extern unsigned long lttng_ht_seed; |
27 | ||
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28 | typedef unsigned long (*hash_fct)(void *_key, unsigned long seed); |
29 | typedef cds_lfht_match_fct hash_match_fct; | |
30 | ||
31 | enum lttng_ht_type { | |
32 | LTTNG_HT_TYPE_STRING, | |
33 | LTTNG_HT_TYPE_ULONG, | |
34 | }; | |
35 | ||
36 | struct lttng_ht { | |
37 | struct cds_lfht *ht; | |
38 | cds_lfht_match_fct match_fct; | |
39 | hash_fct hash_fct; | |
40 | }; | |
41 | ||
42 | struct lttng_ht_iter { | |
43 | struct cds_lfht_iter iter; | |
44 | }; | |
45 | ||
46 | struct lttng_ht_node_str { | |
47 | char *key; | |
48 | struct cds_lfht_node node; | |
49 | struct rcu_head head; | |
50 | }; | |
51 | ||
52 | struct lttng_ht_node_ulong { | |
53 | unsigned long key; | |
54 | struct cds_lfht_node node; | |
55 | struct rcu_head head; | |
56 | }; | |
57 | ||
58 | /* Hashtable new and destroy */ | |
59 | extern struct lttng_ht *lttng_ht_new(unsigned long size, int type); | |
60 | extern void lttng_ht_destroy(struct lttng_ht *ht); | |
61 | ||
62 | /* Specialized node init and free functions */ | |
63 | extern void lttng_ht_node_init_str(struct lttng_ht_node_str *node, char *key); | |
64 | extern void lttng_ht_node_init_ulong(struct lttng_ht_node_ulong *node, | |
65 | unsigned long key); | |
66 | extern void lttng_ht_node_free_str(struct lttng_ht_node_str *node); | |
67 | extern void lttng_ht_node_free_ulong(struct lttng_ht_node_ulong *node); | |
68 | ||
69 | extern void lttng_ht_lookup(struct lttng_ht *ht, void *key, | |
70 | struct lttng_ht_iter *iter); | |
71 | ||
72 | /* Specialized add unique functions */ | |
73 | extern void lttng_ht_add_unique_str(struct lttng_ht *ht, | |
74 | struct lttng_ht_node_str *node); | |
75 | extern void lttng_ht_add_unique_ulong(struct lttng_ht *ht, | |
76 | struct lttng_ht_node_ulong *node); | |
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77 | extern struct lttng_ht_node_ulong *lttng_ht_add_replace_ulong( |
78 | struct lttng_ht *ht, struct lttng_ht_node_ulong *node); | |
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79 | extern void lttng_ht_add_ulong(struct lttng_ht *ht, |
80 | struct lttng_ht_node_ulong *node); | |
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81 | |
82 | extern int lttng_ht_del(struct lttng_ht *ht, struct lttng_ht_iter *iter); | |
83 | ||
84 | extern void lttng_ht_get_first(struct lttng_ht *ht, | |
85 | struct lttng_ht_iter *iter); | |
86 | extern void lttng_ht_get_next(struct lttng_ht *ht, struct lttng_ht_iter *iter); | |
87 | ||
88 | extern unsigned long lttng_ht_get_count(struct lttng_ht *ht); | |
89 | ||
90 | extern struct lttng_ht_node_str *lttng_ht_iter_get_node_str( | |
91 | struct lttng_ht_iter *iter); | |
92 | extern struct lttng_ht_node_ulong *lttng_ht_iter_get_node_ulong( | |
93 | struct lttng_ht_iter *iter); | |
94 | ||
95 | #endif /* _LTT_HT_H */ |