Commit | Line | Data |
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c6c8fea2 | 1 | /* |
64afe353 | 2 | * Copyright (C) 2006-2011 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
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 | ||
fb778ea1 | 30 | for (i = 0 ; i < hash->size; i++) { |
c6c8fea2 | 31 | INIT_HLIST_HEAD(&hash->table[i]); |
fb778ea1 ML |
32 | spin_lock_init(&hash->list_locks[i]); |
33 | } | |
c6c8fea2 SE |
34 | } |
35 | ||
36 | /* free only the hashtable and the hash itself. */ | |
37 | void hash_destroy(struct hashtable_t *hash) | |
38 | { | |
fb778ea1 | 39 | kfree(hash->list_locks); |
c6c8fea2 SE |
40 | kfree(hash->table); |
41 | kfree(hash); | |
42 | } | |
43 | ||
44 | /* allocates and clears the hash */ | |
45 | struct hashtable_t *hash_new(int size) | |
46 | { | |
47 | struct hashtable_t *hash; | |
48 | ||
fb778ea1 | 49 | hash = kmalloc(sizeof(struct hashtable_t), GFP_ATOMIC); |
c6c8fea2 SE |
50 | if (!hash) |
51 | return NULL; | |
52 | ||
c6c8fea2 | 53 | hash->table = kmalloc(sizeof(struct element_t *) * size, GFP_ATOMIC); |
fb778ea1 ML |
54 | if (!hash->table) |
55 | goto free_hash; | |
c6c8fea2 | 56 | |
fb778ea1 ML |
57 | hash->list_locks = kmalloc(sizeof(spinlock_t) * size, GFP_ATOMIC); |
58 | if (!hash->list_locks) | |
59 | goto free_table; | |
c6c8fea2 | 60 | |
fb778ea1 | 61 | hash->size = size; |
c6c8fea2 | 62 | hash_init(hash); |
c6c8fea2 | 63 | return hash; |
fb778ea1 ML |
64 | |
65 | free_table: | |
66 | kfree(hash->table); | |
67 | free_hash: | |
68 | kfree(hash); | |
69 | return NULL; | |
70 | } |