Subversion Repositories HelenOS

Rev

Rev 793 | Rev 1780 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
790 jermar 1 
/*
2 
 * Copyright (C) 2006 Jakub 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 
 
1702 cejka 29 
 /** @addtogroup genericadt
30 
 * @{
31 
 */
32 
/** @file
33 
 */
34 
 
790 jermar 35 
#ifndef __HASH_TABLE_H__
36 
#define __HASH_TABLE_H__
37 
 
792 jermar 38 
#include <adt/list.h>
790 jermar 39 
#include <arch/types.h>
40 
#include <typedefs.h>
41 
 
42 
/** Hash table structure. */
43 
struct hash_table {
44 
	link_t *entry;
45 
	count_t entries;
46 
	count_t max_keys;
47 
	hash_table_operations_t *op;
48 
};
49 
 
50 
/** Set of operations for hash table. */
51 
struct hash_table_operations {
52 
	/** Hash function.
53 
	 *
54 
	 * @param key Array of keys needed to compute hash index. All keys must be passed.
55 
	 *
56 
	 * @return Index into hash table.
57 
	 */
58 
	index_t (* hash)(__native key[]);
59 
 
60 
	/** Hash table item comparison function.
61 
	 *
792 jermar 62 
	 * @param key Array of keys that will be compared with item. It is not necessary to pass all keys.
790 jermar 63 
	 *
64 
	 * @return true if the keys match, false otherwise.
65 
	 */
66 
	bool (*compare)(__native key[], count_t keys, link_t *item);
67 
 
68 
	/** Hash table item removal callback.
69 
	 *
70 
	 * @param item Item that was removed from the hash table.
71 
	 */
72 
	void (*remove_callback)(link_t *item);
73 
};
74 
 
793 jermar 75 
#define hash_table_get_instance(item, type, member)	list_get_instance((item), type, member)
790 jermar 76 
 
77 
extern void hash_table_create(hash_table_t *h, count_t m, count_t max_keys, hash_table_operations_t *op);
792 jermar 78 
extern void hash_table_insert(hash_table_t *h, __native key[], link_t *item);
790 jermar 79 
extern link_t *hash_table_find(hash_table_t *h, __native key[]);
80 
extern void hash_table_remove(hash_table_t *h, __native key[], count_t keys);
81 
 
82 
#endif
1702 cejka 83 
 
84 
 /** @}
85 
 */
86