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