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805e021f CE |
1 | /* |
2 | * Copyright (c) 2012 Your File System Inc. All rights reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * 1. Redistributions of source code must retain the above copyright | |
8 | * notice, this list of conditions and the following disclaimer. | |
9 | * 2. Redistributions in binary form must reproduce the above copyright | |
10 | * notice, this list of conditions and the following disclaimer in the | |
11 | * documentation and/or other materials provided with the distribution. | |
12 | * | |
13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
15 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
16 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
17 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
18 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
19 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
20 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
21 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
22 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
23 | */ | |
24 | #include <afsconfig.h> | |
25 | #include <afs/param.h> | |
26 | ||
27 | #include <roken.h> | |
28 | ||
29 | #include "dict.h" | |
30 | ||
31 | static_inline int | |
32 | isPowerOf2(int value) | |
33 | { | |
34 | return value && !(value & (value -1)); | |
35 | } | |
36 | ||
37 | struct opr_dict * | |
38 | opr_dict_Init(unsigned int size) | |
39 | { | |
40 | struct opr_dict *dict; | |
41 | int i; | |
42 | ||
43 | if (!isPowerOf2(size)) | |
44 | return NULL; | |
45 | ||
46 | dict = calloc(1, sizeof(struct opr_dict)); | |
47 | dict->size = size; | |
48 | ||
49 | dict->table = malloc(dict->size * sizeof(struct opr_queue)); | |
50 | for (i = 0; i < dict->size; i++) { | |
51 | opr_queue_Init(&dict->table[i]); | |
52 | } | |
53 | ||
54 | return dict; | |
55 | } | |
56 | ||
57 | void | |
58 | opr_dict_Free(struct opr_dict **dict) | |
59 | { | |
60 | free((*dict)->table); | |
61 | free(*dict); | |
62 | *dict = NULL; | |
63 | } |