Commit | Line | Data |
---|---|---|
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 | ||
01389791 MD |
7 | #ifdef __cplusplus |
8 | extern "C" { | |
9 | #endif | |
10 | ||
abc490a1 | 11 | struct rcu_ht_node { |
9b35f1e4 | 12 | /* cache-hot for iteration */ |
abc490a1 | 13 | struct rcu_ht_node *next; |
abc490a1 | 14 | unsigned long reverse_hash; |
9b35f1e4 MD |
15 | void *key; |
16 | unsigned int key_len; | |
abc490a1 | 17 | unsigned int dummy; |
9b35f1e4 | 18 | /* cache-cold for iteration */ |
abc490a1 MD |
19 | struct rcu_head head; |
20 | }; | |
21 | ||
22 | struct rcu_ht; | |
ab7d5fc6 | 23 | |
5e28c532 MD |
24 | /* |
25 | * Caution ! | |
abc490a1 | 26 | * Ensure reader and writer threads are registered as urcu readers. |
5e28c532 MD |
27 | */ |
28 | ||
732ad076 MD |
29 | typedef unsigned long (*ht_hash_fct)(void *key, size_t length, |
30 | unsigned long seed); | |
31 | typedef unsigned long (*ht_compare_fct)(void *key1, size_t key1_len, | |
32 | void *key2, size_t key2_len); | |
abc490a1 MD |
33 | |
34 | static inline | |
732ad076 | 35 | void ht_node_init(struct rcu_ht_node *node, void *key, |
cb233752 | 36 | size_t key_len) |
abc490a1 MD |
37 | { |
38 | node->key = key; | |
732ad076 | 39 | node->key_len = key_len; |
abc490a1 MD |
40 | node->dummy = 0; |
41 | } | |
674f7a69 MD |
42 | |
43 | /* | |
44 | * init_size must be power of two. | |
45 | */ | |
abc490a1 | 46 | struct rcu_ht *ht_new(ht_hash_fct hash_fct, |
732ad076 MD |
47 | ht_compare_fct compare_fct, |
48 | unsigned long hash_seed, | |
abc490a1 MD |
49 | unsigned long init_size, |
50 | void (*ht_call_rcu)(struct rcu_head *head, | |
51 | void (*func)(struct rcu_head *head))); | |
ab7d5fc6 | 52 | |
5e28c532 | 53 | int ht_destroy(struct rcu_ht *ht); |
273399de MD |
54 | /* Count the number of nodes in the hash table. Call with rcu_read_lock held. */ |
55 | void ht_count_nodes(struct rcu_ht *ht, | |
56 | unsigned long *count, | |
57 | unsigned long *removed); | |
ab7d5fc6 | 58 | |
abc490a1 | 59 | /* Call with rcu_read_lock held. */ |
732ad076 | 60 | struct rcu_ht_node *ht_lookup(struct rcu_ht *ht, void *key, size_t key_len); |
ab7d5fc6 | 61 | |
abc490a1 | 62 | /* Call with rcu_read_lock held. */ |
f000907d | 63 | void ht_add(struct rcu_ht *ht, struct rcu_ht_node *node); |
ab7d5fc6 | 64 | |
18117871 MD |
65 | /* |
66 | * Call with rcu_read_lock held. | |
67 | * Returns the node added upon success. | |
68 | * Returns the unique node already present upon failure. If ht_add_unique fails, | |
69 | * the node passed as parameter should be freed by the caller. | |
70 | */ | |
71 | struct rcu_ht_node *ht_add_unique(struct rcu_ht *ht, struct rcu_ht_node *node); | |
3eca1b8c | 72 | |
abc490a1 MD |
73 | /* Call with rcu_read_lock held. */ |
74 | int ht_remove(struct rcu_ht *ht, struct rcu_ht_node *node); | |
ab7d5fc6 | 75 | |
464a1ec9 MD |
76 | void ht_resize(struct rcu_ht *ht, int growth); |
77 | ||
01389791 MD |
78 | #ifdef __cplusplus |
79 | } | |
80 | #endif | |
81 | ||
a42cc659 | 82 | #endif /* _URCU_RCULFHASH_H */ |