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 | ||
01389791 MD |
7 | #ifdef __cplusplus |
8 | extern "C" { | |
9 | #endif | |
10 | ||
cc4fcb10 | 11 | struct _rcu_ht_node { |
d95bd160 | 12 | struct rcu_ht_node *next; /* ptr | DUMMY_FLAG | REMOVED_FLAG */ |
abc490a1 | 13 | unsigned long reverse_hash; |
cc4fcb10 MD |
14 | }; |
15 | ||
16 | struct rcu_ht_node { | |
17 | /* cache-hot for iteration */ | |
18 | struct _rcu_ht_node p; /* needs to be first field */ | |
9b35f1e4 MD |
19 | void *key; |
20 | unsigned int key_len; | |
9b35f1e4 | 21 | /* cache-cold for iteration */ |
abc490a1 MD |
22 | struct rcu_head head; |
23 | }; | |
24 | ||
25 | struct rcu_ht; | |
ab7d5fc6 | 26 | |
5e28c532 MD |
27 | /* |
28 | * Caution ! | |
abc490a1 | 29 | * Ensure reader and writer threads are registered as urcu readers. |
5e28c532 MD |
30 | */ |
31 | ||
732ad076 MD |
32 | typedef unsigned long (*ht_hash_fct)(void *key, size_t length, |
33 | unsigned long seed); | |
34 | typedef unsigned long (*ht_compare_fct)(void *key1, size_t key1_len, | |
35 | void *key2, size_t key2_len); | |
abc490a1 MD |
36 | |
37 | static inline | |
732ad076 | 38 | void ht_node_init(struct rcu_ht_node *node, void *key, |
cb233752 | 39 | size_t key_len) |
abc490a1 MD |
40 | { |
41 | node->key = key; | |
732ad076 | 42 | node->key_len = key_len; |
abc490a1 | 43 | } |
674f7a69 MD |
44 | |
45 | /* | |
46 | * init_size must be power of two. | |
47 | */ | |
abc490a1 | 48 | struct rcu_ht *ht_new(ht_hash_fct hash_fct, |
732ad076 MD |
49 | ht_compare_fct compare_fct, |
50 | unsigned long hash_seed, | |
abc490a1 MD |
51 | unsigned long init_size, |
52 | void (*ht_call_rcu)(struct rcu_head *head, | |
53 | void (*func)(struct rcu_head *head))); | |
ab7d5fc6 | 54 | |
5e28c532 | 55 | int ht_destroy(struct rcu_ht *ht); |
273399de MD |
56 | /* Count the number of nodes in the hash table. Call with rcu_read_lock held. */ |
57 | void ht_count_nodes(struct rcu_ht *ht, | |
58 | unsigned long *count, | |
59 | unsigned long *removed); | |
ab7d5fc6 | 60 | |
abc490a1 | 61 | /* Call with rcu_read_lock held. */ |
732ad076 | 62 | struct rcu_ht_node *ht_lookup(struct rcu_ht *ht, void *key, size_t key_len); |
ab7d5fc6 | 63 | |
abc490a1 | 64 | /* Call with rcu_read_lock held. */ |
f000907d | 65 | void ht_add(struct rcu_ht *ht, struct rcu_ht_node *node); |
ab7d5fc6 | 66 | |
18117871 MD |
67 | /* |
68 | * Call with rcu_read_lock held. | |
69 | * Returns the node added upon success. | |
70 | * Returns the unique node already present upon failure. If ht_add_unique fails, | |
71 | * the node passed as parameter should be freed by the caller. | |
72 | */ | |
73 | struct rcu_ht_node *ht_add_unique(struct rcu_ht *ht, struct rcu_ht_node *node); | |
3eca1b8c | 74 | |
abc490a1 MD |
75 | /* Call with rcu_read_lock held. */ |
76 | int ht_remove(struct rcu_ht *ht, struct rcu_ht_node *node); | |
ab7d5fc6 | 77 | |
464a1ec9 MD |
78 | void ht_resize(struct rcu_ht *ht, int growth); |
79 | ||
01389791 MD |
80 | #ifdef __cplusplus |
81 | } | |
82 | #endif | |
83 | ||
a42cc659 | 84 | #endif /* _URCU_RCULFHASH_H */ |