Subversion Repositories HelenOS

Rev

Rev 4490 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
790 jermar 1 
/*
2071 jermar 2 
 * Copyright (c) 2006 Jakub Jermar
790 jermar 3 
 * All rights reserved.
4 
 *
5 
 * Redistribution and use in source and binary forms, with or without
6 
 * modification, are permitted provided that the following conditions
7 
 * are met:
8 
 *
9 
 * - Redistributions of source code must retain the above copyright
10 
 *   notice, this list of conditions and the following disclaimer.
11 
 * - Redistributions in binary form must reproduce the above copyright
12 
 *   notice, this list of conditions and the following disclaimer in the
13 
 *   documentation and/or other materials provided with the distribution.
14 
 * - The name of the author may not be used to endorse or promote products
15 
 *   derived from this software without specific prior written permission.
16 
 *
17 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
 */
28 
 
1865 jermar 29 
/** @addtogroup genericadt
1702 cejka 30 
 * @{
31 
 */
32 
/** @file
33 
 */
34 
 
1865 jermar 35 
#ifndef KERN_HASH_TABLE_H_
36 
#define KERN_HASH_TABLE_H_
790 jermar 37 
 
792 jermar 38 
#include <adt/list.h>
790 jermar 39 
#include <arch/types.h>
40 
 
41 
/** Set of operations for hash table. */
2089 decky 42 
typedef struct {
790 jermar 43 
    /** Hash function.
44 
     *
2106 jermar 45 
     * @param key   Array of keys needed to compute hash index. All keys must
46 
     *      be passed.
790 jermar 47 
     *
48 
     * @return Index into hash table.
49 
     */
4490 decky 50 
    size_t (* hash)(unative_t key[]);
790 jermar 51 
 
52 
    /** Hash table item comparison function.
53 
     *
2106 jermar 54 
     * @param key   Array of keys that will be compared with item. It is not
55 
     *      necessary to pass all keys.
790 jermar 56 
     *
57 
     * @return true if the keys match, false otherwise.
58 
     */
4490 decky 59 
    bool (*compare)(unative_t key[], size_t keys, link_t *item);
790 jermar 60 
 
61 
    /** Hash table item removal callback.
62 
     *
63 
     * @param item Item that was removed from the hash table.
64 
     */
65 
    void (*remove_callback)(link_t *item);
2089 decky 66 
} hash_table_operations_t;
790 jermar 67 
 
2089 decky 68 
/** Hash table structure. */
69 
typedef struct {
70 
    link_t *entry;
4490 decky 71 
    size_t entries;
72 
    size_t max_keys;
2089 decky 73 
    hash_table_operations_t *op;
74 
} hash_table_t;
75 
 
2106 jermar 76 
#define hash_table_get_instance(item, type, member) \
77 
    list_get_instance((item), type, member)
790 jermar 78 
 
4490 decky 79 
extern void hash_table_create(hash_table_t *h, size_t m, size_t max_keys,
2106 jermar 80 
    hash_table_operations_t *op);
1780 jermar 81 
extern void hash_table_insert(hash_table_t *h, unative_t key[], link_t *item);
82 
extern link_t *hash_table_find(hash_table_t *h, unative_t key[]);
4490 decky 83 
extern void hash_table_remove(hash_table_t *h, unative_t key[], size_t keys);
790 jermar 84 
 
85 
#endif
1702 cejka 86 
 
1865 jermar 87 
/** @}
1702 cejka 88 
 */