2 * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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"
17 #if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && !defined(OPENSSL_SYS_WINDOWS)
19 # if defined(OPENSSL_SYS_UNIX)
20 # include <sys/types.h>
24 # ifdef PTHREAD_RWLOCK_INITIALIZER
28 CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
33 if ((lock = OPENSSL_zalloc(sizeof(pthread_rwlock_t))) == NULL) {
34 /* Don't set error, to avoid recursion blowup. */
38 if (pthread_rwlock_init(lock, NULL) != 0) {
43 pthread_mutexattr_t attr;
46 if ((lock = OPENSSL_zalloc(sizeof(pthread_mutex_t))) == NULL) {
47 /* Don't set error, to avoid recursion blowup. */
51 pthread_mutexattr_init(&attr);
52 #if defined(__TANDEM) && defined(_SPT_MODEL_)
53 pthread_mutexattr_setkind_np(&attr,MUTEX_RECURSIVE_NP);
55 pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
58 if (pthread_mutex_init(lock, &attr) != 0) {
59 pthread_mutexattr_destroy(&attr);
64 pthread_mutexattr_destroy(&attr);
70 int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
73 if (pthread_rwlock_rdlock(lock) != 0)
76 if (pthread_mutex_lock(lock) != 0)
83 int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
86 if (pthread_rwlock_wrlock(lock) != 0)
89 if (pthread_mutex_lock(lock) != 0)
96 int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
99 if (pthread_rwlock_unlock(lock) != 0)
102 if (pthread_mutex_unlock(lock) != 0)
109 void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock)
115 pthread_rwlock_destroy(lock);
117 pthread_mutex_destroy(lock);
124 int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
126 if (pthread_once(once, init) != 0)
132 int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
134 if (pthread_key_create(key, cleanup) != 0)
140 void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
142 return pthread_getspecific(*key);
145 int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
147 if (pthread_setspecific(*key, val) != 0)
153 int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
155 if (pthread_key_delete(*key) != 0)
161 CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
163 return pthread_self();
166 int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
168 return pthread_equal(a, b);
171 int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
173 # if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL)
174 if (__atomic_is_lock_free(sizeof(*val), val)) {
175 *ret = __atomic_add_fetch(val, amount, __ATOMIC_ACQ_REL);
178 # elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11))
179 /* This will work for all future Solaris versions. */
181 *ret = atomic_add_int_nv((volatile unsigned int *)val, amount);
185 if (!CRYPTO_THREAD_write_lock(lock))
191 if (!CRYPTO_THREAD_unlock(lock))
198 /* TODO(3.0): No fork protection in FIPS module yet! */
200 # ifdef OPENSSL_SYS_UNIX
201 static pthread_once_t fork_once_control = PTHREAD_ONCE_INIT;
203 static void fork_once_func(void)
205 pthread_atfork(OPENSSL_fork_prepare,
206 OPENSSL_fork_parent, OPENSSL_fork_child);
210 int openssl_init_fork_handlers(void)
212 # ifdef OPENSSL_SYS_UNIX
213 if (pthread_once(&fork_once_control, fork_once_func) == 0)
218 # endif /* FIPS_MODULE */
220 int openssl_get_fork_id(void)