Commit | Line | Data |
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a42cc659 MD |
1 | #ifndef _URCU_RCULFHASH_H |
2 | #define _URCU_RCULFHASH_H | |
ab7d5fc6 | 3 | |
674f7a69 | 4 | #include <stdint.h> |
abc490a1 MD |
5 | #include <urcu-call-rcu.h> |
6 | ||
7 | struct rcu_ht_node { | |
8 | struct rcu_ht_node *next; | |
9 | void *key; | |
732ad076 | 10 | size_t key_len; |
abc490a1 MD |
11 | unsigned long hash; |
12 | unsigned long reverse_hash; | |
13 | unsigned int dummy; | |
abc490a1 MD |
14 | struct rcu_head head; |
15 | }; | |
16 | ||
17 | struct rcu_ht; | |
ab7d5fc6 | 18 | |
5e28c532 MD |
19 | /* |
20 | * Caution ! | |
abc490a1 | 21 | * Ensure reader and writer threads are registered as urcu readers. |
5e28c532 MD |
22 | */ |
23 | ||
732ad076 MD |
24 | typedef unsigned long (*ht_hash_fct)(void *key, size_t length, |
25 | unsigned long seed); | |
26 | typedef unsigned long (*ht_compare_fct)(void *key1, size_t key1_len, | |
27 | void *key2, size_t key2_len); | |
abc490a1 MD |
28 | |
29 | static inline | |
732ad076 | 30 | void ht_node_init(struct rcu_ht_node *node, void *key, |
cb233752 | 31 | size_t key_len) |
abc490a1 MD |
32 | { |
33 | node->key = key; | |
732ad076 | 34 | node->key_len = key_len; |
abc490a1 MD |
35 | node->dummy = 0; |
36 | } | |
674f7a69 MD |
37 | |
38 | /* | |
39 | * init_size must be power of two. | |
40 | */ | |
abc490a1 | 41 | struct rcu_ht *ht_new(ht_hash_fct hash_fct, |
732ad076 MD |
42 | ht_compare_fct compare_fct, |
43 | unsigned long hash_seed, | |
abc490a1 MD |
44 | unsigned long init_size, |
45 | void (*ht_call_rcu)(struct rcu_head *head, | |
46 | void (*func)(struct rcu_head *head))); | |
ab7d5fc6 | 47 | |
5e28c532 | 48 | int ht_destroy(struct rcu_ht *ht); |
273399de MD |
49 | /* Count the number of nodes in the hash table. Call with rcu_read_lock held. */ |
50 | void ht_count_nodes(struct rcu_ht *ht, | |
51 | unsigned long *count, | |
52 | unsigned long *removed); | |
ab7d5fc6 | 53 | |
abc490a1 | 54 | /* Call with rcu_read_lock held. */ |
732ad076 | 55 | struct rcu_ht_node *ht_lookup(struct rcu_ht *ht, void *key, size_t key_len); |
ab7d5fc6 | 56 | |
abc490a1 | 57 | /* Call with rcu_read_lock held. */ |
f000907d | 58 | void ht_add(struct rcu_ht *ht, struct rcu_ht_node *node); |
ab7d5fc6 | 59 | |
3eca1b8c MD |
60 | /* Call with rcu_read_lock held. */ |
61 | int ht_add_unique(struct rcu_ht *ht, struct rcu_ht_node *node); | |
62 | ||
abc490a1 MD |
63 | /* Call with rcu_read_lock held. */ |
64 | int ht_remove(struct rcu_ht *ht, struct rcu_ht_node *node); | |
ab7d5fc6 | 65 | |
464a1ec9 MD |
66 | void ht_resize(struct rcu_ht *ht, int growth); |
67 | ||
a42cc659 | 68 | #endif /* _URCU_RCULFHASH_H */ |