2 * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include <openssl/crypto.h>
11 #include "internal/cryptlib.h"
13 #if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && !defined(OPENSSL_SYS_WINDOWS)
15 # ifdef PTHREAD_RWLOCK_INITIALIZER
19 CRYPTO_RWLOCK
*CRYPTO_THREAD_lock_new(void)
24 if ((lock
= OPENSSL_zalloc(sizeof(pthread_rwlock_t
))) == NULL
) {
25 /* Don't set error, to avoid recursion blowup. */
29 if (pthread_rwlock_init(lock
, NULL
) != 0) {
34 pthread_mutexattr_t attr
;
37 if ((lock
= OPENSSL_zalloc(sizeof(pthread_mutex_t
))) == NULL
) {
38 /* Don't set error, to avoid recursion blowup. */
42 pthread_mutexattr_init(&attr
);
43 pthread_mutexattr_settype(&attr
, PTHREAD_MUTEX_RECURSIVE
);
45 if (pthread_mutex_init(lock
, &attr
) != 0) {
46 pthread_mutexattr_destroy(&attr
);
51 pthread_mutexattr_destroy(&attr
);
57 int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK
*lock
)
60 if (pthread_rwlock_rdlock(lock
) != 0)
63 if (pthread_mutex_lock(lock
) != 0)
70 int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK
*lock
)
73 if (pthread_rwlock_wrlock(lock
) != 0)
76 if (pthread_mutex_lock(lock
) != 0)
83 int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK
*lock
)
86 if (pthread_rwlock_unlock(lock
) != 0)
89 if (pthread_mutex_unlock(lock
) != 0)
96 void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK
*lock
)
102 pthread_rwlock_destroy(lock
);
104 pthread_mutex_destroy(lock
);
111 int CRYPTO_THREAD_run_once(CRYPTO_ONCE
*once
, void (*init
)(void))
113 if (pthread_once(once
, init
) != 0)
119 int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL
*key
, void (*cleanup
)(void *))
121 if (pthread_key_create(key
, cleanup
) != 0)
127 void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL
*key
)
129 return pthread_getspecific(*key
);
132 int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL
*key
, void *val
)
134 if (pthread_setspecific(*key
, val
) != 0)
140 int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL
*key
)
142 if (pthread_key_delete(*key
) != 0)
148 CRYPTO_THREAD_ID
CRYPTO_THREAD_get_current_id(void)
150 return pthread_self();
153 int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a
, CRYPTO_THREAD_ID b
)
155 return pthread_equal(a
, b
);
158 int CRYPTO_atomic_add(int *val
, int amount
, int *ret
, CRYPTO_RWLOCK
*lock
)
160 # if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL)
161 if (__atomic_is_lock_free(sizeof(*val
), val
)) {
162 *ret
= __atomic_add_fetch(val
, amount
, __ATOMIC_ACQ_REL
);
166 if (!CRYPTO_THREAD_write_lock(lock
))
172 if (!CRYPTO_THREAD_unlock(lock
))
178 # ifdef OPENSSL_SYS_UNIX
179 static pthread_once_t fork_once_control
= PTHREAD_ONCE_INIT
;
181 static void fork_once_func(void)
183 pthread_atfork(OPENSSL_fork_prepare
,
184 OPENSSL_fork_parent
, OPENSSL_fork_child
);
188 int openssl_init_fork_handlers(void)
190 # ifdef OPENSSL_SYS_UNIX
191 if (pthread_once(&fork_once_control
, fork_once_func
) == 0)