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c6c8fea2 SE |
1 | /* |
2 | * Copyright (C) 2006-2010 B.A.T.M.A.N. contributors: | |
3 | * | |
4 | * Simon Wunderlich, Marek Lindner | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of version 2 of the GNU General Public | |
8 | * License as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
18 | * 02110-1301, USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include "main.h" | |
23 | #include "hash.h" | |
24 | ||
25 | /* clears the hash */ | |
26 | static void hash_init(struct hashtable_t *hash) | |
27 | { | |
28 | int i; | |
29 | ||
30 | for (i = 0 ; i < hash->size; i++) | |
31 | INIT_HLIST_HEAD(&hash->table[i]); | |
32 | } | |
33 | ||
34 | /* free only the hashtable and the hash itself. */ | |
35 | void hash_destroy(struct hashtable_t *hash) | |
36 | { | |
37 | kfree(hash->table); | |
38 | kfree(hash); | |
39 | } | |
40 | ||
41 | /* allocates and clears the hash */ | |
42 | struct hashtable_t *hash_new(int size) | |
43 | { | |
44 | struct hashtable_t *hash; | |
45 | ||
46 | hash = kmalloc(sizeof(struct hashtable_t) , GFP_ATOMIC); | |
47 | ||
48 | if (!hash) | |
49 | return NULL; | |
50 | ||
51 | hash->size = size; | |
52 | hash->table = kmalloc(sizeof(struct element_t *) * size, GFP_ATOMIC); | |
53 | ||
54 | if (!hash->table) { | |
55 | kfree(hash); | |
56 | return NULL; | |
57 | } | |
58 | ||
59 | hash_init(hash); | |
60 | ||
61 | return hash; | |
62 | } |