/src/unbound/compat/arc4_lock.c
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1 | | /* arc4_lock.c - global lock for arc4random |
2 | | * |
3 | | * Copyright (c) 2014, NLnet Labs. All rights reserved. |
4 | | * |
5 | | * This software is open source. |
6 | | * |
7 | | * Redistribution and use in source and binary forms, with or without |
8 | | * modification, are permitted provided that the following conditions |
9 | | * are met: |
10 | | * |
11 | | * Redistributions of source code must retain the above copyright notice, |
12 | | * this list of conditions and the following disclaimer. |
13 | | * |
14 | | * Redistributions in binary form must reproduce the above copyright notice, |
15 | | * this list of conditions and the following disclaimer in the documentation |
16 | | * and/or other materials provided with the distribution. |
17 | | * |
18 | | * Neither the name of the NLNET LABS nor the names of its contributors may |
19 | | * be used to endorse or promote products derived from this software without |
20 | | * specific prior written permission. |
21 | | * |
22 | | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
23 | | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
24 | | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
25 | | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
26 | | * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
27 | | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
28 | | * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
29 | | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
30 | | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
31 | | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
32 | | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
33 | | */ |
34 | | #include "config.h" |
35 | 0 | #define LOCKRET(func) func |
36 | | #ifdef ENABLE_LOCK_CHECKS |
37 | | #undef ENABLE_LOCK_CHECKS |
38 | | #endif |
39 | | #include "util/locks.h" |
40 | | |
41 | | void _ARC4_LOCK(void); |
42 | | void _ARC4_UNLOCK(void); |
43 | | |
44 | | #ifdef THREADS_DISABLED |
45 | | void _ARC4_LOCK(void) |
46 | | { |
47 | | } |
48 | | |
49 | | void _ARC4_UNLOCK(void) |
50 | | { |
51 | | } |
52 | | |
53 | | void _ARC4_LOCK_DESTROY(void) |
54 | | { |
55 | | } |
56 | | #else /* !THREADS_DISABLED */ |
57 | | |
58 | | static lock_quick_type arc4lock; |
59 | | static int arc4lockinit = 0; |
60 | | |
61 | | void _ARC4_LOCK(void) |
62 | 0 | { |
63 | 0 | if(!arc4lockinit) { |
64 | 0 | arc4lockinit = 1; |
65 | 0 | lock_quick_init(&arc4lock); |
66 | 0 | } |
67 | 0 | lock_quick_lock(&arc4lock); |
68 | 0 | } |
69 | | |
70 | | void _ARC4_UNLOCK(void) |
71 | 0 | { |
72 | 0 | lock_quick_unlock(&arc4lock); |
73 | 0 | } |
74 | | |
75 | | void _ARC4_LOCK_DESTROY(void) |
76 | 0 | { |
77 | 0 | if(arc4lockinit) { |
78 | 0 | arc4lockinit = 0; |
79 | 0 | lock_quick_destroy(&arc4lock); |
80 | 0 | } |
81 | 0 | } |
82 | | #endif /* THREADS_DISABLED */ |