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10#ifndef _LINUX_ASSOC_ARRAY_H
11#define _LINUX_ASSOC_ARRAY_H
12
13#ifdef CONFIG_ASSOCIATIVE_ARRAY
14
15#include <linux/types.h>
16
17#define ASSOC_ARRAY_KEY_CHUNK_SIZE BITS_PER_LONG
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19
20
21
22struct assoc_array {
23 struct assoc_array_ptr *root;
24 unsigned long nr_leaves_on_tree;
25};
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29
30struct assoc_array_ops {
31
32 unsigned long (*get_key_chunk)(const void *index_key, int level);
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35 unsigned long (*get_object_key_chunk)(const void *object, int level);
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37
38 bool (*compare_object)(const void *object, const void *index_key);
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43 int (*diff_objects)(const void *object, const void *index_key);
44
45
46 void (*free_object)(void *object);
47};
48
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51
52struct assoc_array_edit;
53
54static inline void assoc_array_init(struct assoc_array *array)
55{
56 array->root = NULL;
57 array->nr_leaves_on_tree = 0;
58}
59
60extern int assoc_array_iterate(const struct assoc_array *array,
61 int (*iterator)(const void *object,
62 void *iterator_data),
63 void *iterator_data);
64extern void *assoc_array_find(const struct assoc_array *array,
65 const struct assoc_array_ops *ops,
66 const void *index_key);
67extern void assoc_array_destroy(struct assoc_array *array,
68 const struct assoc_array_ops *ops);
69extern struct assoc_array_edit *assoc_array_insert(struct assoc_array *array,
70 const struct assoc_array_ops *ops,
71 const void *index_key,
72 void *object);
73extern void assoc_array_insert_set_object(struct assoc_array_edit *edit,
74 void *object);
75extern struct assoc_array_edit *assoc_array_delete(struct assoc_array *array,
76 const struct assoc_array_ops *ops,
77 const void *index_key);
78extern struct assoc_array_edit *assoc_array_clear(struct assoc_array *array,
79 const struct assoc_array_ops *ops);
80extern void assoc_array_apply_edit(struct assoc_array_edit *edit);
81extern void assoc_array_cancel_edit(struct assoc_array_edit *edit);
82extern int assoc_array_gc(struct assoc_array *array,
83 const struct assoc_array_ops *ops,
84 bool (*iterator)(void *object, void *iterator_data),
85 void *iterator_data);
86
87#endif
88#endif
89