rculfhash test: add options
[urcu.git] / urcu / rculfhash.h
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1#ifndef _URCU_RCULFHASH_H
2#define _URCU_RCULFHASH_H
ab7d5fc6 3
674f7a69 4#include <stdint.h>
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5#include <urcu-call-rcu.h>
6
7struct rcu_ht_node {
9b35f1e4 8 /* cache-hot for iteration */
abc490a1 9 struct rcu_ht_node *next;
abc490a1 10 unsigned long reverse_hash;
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11 void *key;
12 unsigned int key_len;
abc490a1 13 unsigned int dummy;
9b35f1e4 14 /* cache-cold for iteration */
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15 struct rcu_head head;
16};
17
18struct rcu_ht;
ab7d5fc6 19
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20/*
21 * Caution !
abc490a1 22 * Ensure reader and writer threads are registered as urcu readers.
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23 */
24
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25typedef unsigned long (*ht_hash_fct)(void *key, size_t length,
26 unsigned long seed);
27typedef unsigned long (*ht_compare_fct)(void *key1, size_t key1_len,
28 void *key2, size_t key2_len);
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29
30static inline
732ad076 31void ht_node_init(struct rcu_ht_node *node, void *key,
cb233752 32 size_t key_len)
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33{
34 node->key = key;
732ad076 35 node->key_len = key_len;
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36 node->dummy = 0;
37}
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38
39/*
40 * init_size must be power of two.
41 */
abc490a1 42struct rcu_ht *ht_new(ht_hash_fct hash_fct,
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43 ht_compare_fct compare_fct,
44 unsigned long hash_seed,
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45 unsigned long init_size,
46 void (*ht_call_rcu)(struct rcu_head *head,
47 void (*func)(struct rcu_head *head)));
ab7d5fc6 48
5e28c532 49int ht_destroy(struct rcu_ht *ht);
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50/* Count the number of nodes in the hash table. Call with rcu_read_lock held. */
51void ht_count_nodes(struct rcu_ht *ht,
52 unsigned long *count,
53 unsigned long *removed);
ab7d5fc6 54
abc490a1 55/* Call with rcu_read_lock held. */
732ad076 56struct rcu_ht_node *ht_lookup(struct rcu_ht *ht, void *key, size_t key_len);
ab7d5fc6 57
abc490a1 58/* Call with rcu_read_lock held. */
f000907d 59void ht_add(struct rcu_ht *ht, struct rcu_ht_node *node);
ab7d5fc6 60
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61/*
62 * Call with rcu_read_lock held.
63 * Returns the node added upon success.
64 * Returns the unique node already present upon failure. If ht_add_unique fails,
65 * the node passed as parameter should be freed by the caller.
66 */
67struct rcu_ht_node *ht_add_unique(struct rcu_ht *ht, struct rcu_ht_node *node);
3eca1b8c 68
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69/* Call with rcu_read_lock held. */
70int ht_remove(struct rcu_ht *ht, struct rcu_ht_node *node);
ab7d5fc6 71
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72void ht_resize(struct rcu_ht *ht, int growth);
73
a42cc659 74#endif /* _URCU_RCULFHASH_H */
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