1 /* $OpenBSD: crypto_lock.c,v 1.2 2018/11/28 15:51:32 jsing Exp $ */
2 /*
3 * Copyright (c) 2018 Brent Cook <bcook@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <pthread.h>
19
20 #include <openssl/crypto.h>
21
22 static pthread_mutex_t locks[] = {
23 PTHREAD_MUTEX_INITIALIZER,
24 PTHREAD_MUTEX_INITIALIZER,
25 PTHREAD_MUTEX_INITIALIZER,
26 PTHREAD_MUTEX_INITIALIZER,
27 PTHREAD_MUTEX_INITIALIZER,
28 PTHREAD_MUTEX_INITIALIZER,
29 PTHREAD_MUTEX_INITIALIZER,
30 PTHREAD_MUTEX_INITIALIZER,
31 PTHREAD_MUTEX_INITIALIZER,
32 PTHREAD_MUTEX_INITIALIZER,
33 PTHREAD_MUTEX_INITIALIZER,
34 PTHREAD_MUTEX_INITIALIZER,
35 PTHREAD_MUTEX_INITIALIZER,
36 PTHREAD_MUTEX_INITIALIZER,
37 PTHREAD_MUTEX_INITIALIZER,
38 PTHREAD_MUTEX_INITIALIZER,
39 PTHREAD_MUTEX_INITIALIZER,
40 PTHREAD_MUTEX_INITIALIZER,
41 PTHREAD_MUTEX_INITIALIZER,
42 PTHREAD_MUTEX_INITIALIZER,
43 PTHREAD_MUTEX_INITIALIZER,
44 PTHREAD_MUTEX_INITIALIZER,
45 PTHREAD_MUTEX_INITIALIZER,
46 PTHREAD_MUTEX_INITIALIZER,
47 PTHREAD_MUTEX_INITIALIZER,
48 PTHREAD_MUTEX_INITIALIZER,
49 PTHREAD_MUTEX_INITIALIZER,
50 PTHREAD_MUTEX_INITIALIZER,
51 PTHREAD_MUTEX_INITIALIZER,
52 PTHREAD_MUTEX_INITIALIZER,
53 PTHREAD_MUTEX_INITIALIZER,
54 PTHREAD_MUTEX_INITIALIZER,
55 PTHREAD_MUTEX_INITIALIZER,
56 PTHREAD_MUTEX_INITIALIZER,
57 PTHREAD_MUTEX_INITIALIZER,
58 PTHREAD_MUTEX_INITIALIZER,
59 PTHREAD_MUTEX_INITIALIZER,
60 PTHREAD_MUTEX_INITIALIZER,
61 PTHREAD_MUTEX_INITIALIZER,
62 PTHREAD_MUTEX_INITIALIZER,
63 PTHREAD_MUTEX_INITIALIZER,
64 };
65
66 #define CTASSERT(x) extern char _ctassert[(x) ? 1 : -1 ] \
67 __attribute__((__unused__))
68
69 CTASSERT((sizeof(locks) / sizeof(*locks)) == CRYPTO_NUM_LOCKS);
70
71 void
CRYPTO_lock(int mode,int type,const char * file,int line)72 CRYPTO_lock(int mode, int type, const char *file, int line)
73 {
74 if (type < 0 || type >= CRYPTO_NUM_LOCKS)
75 return;
76
77 if (mode & CRYPTO_LOCK)
78 (void) pthread_mutex_lock(&locks[type]);
79 else if (mode & CRYPTO_UNLOCK)
80 (void) pthread_mutex_unlock(&locks[type]);
81 }
82
83 int
CRYPTO_add_lock(int * pointer,int amount,int type,const char * file,int line)84 CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
85 int line)
86 {
87 int ret;
88
89 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE, type, file, line);
90 ret = *pointer + amount;
91 *pointer = ret;
92 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE, type, file, line);
93
94 return (ret);
95 }
96