2 * Copyright 2016-2021 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 /* We need to use the OPENSSL_fork_*() deprecated APIs */
11 #define OPENSSL_SUPPRESS_DEPRECATED
13 #include <openssl/crypto.h>
14 #include "internal/cryptlib.h"
20 #if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && !defined(OPENSSL_SYS_WINDOWS)
22 # if defined(OPENSSL_SYS_UNIX)
23 # include <sys/types.h>
27 # ifdef PTHREAD_RWLOCK_INITIALIZER
31 CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
36 if ((lock = OPENSSL_zalloc(sizeof(pthread_rwlock_t))) == NULL) {
37 /* Don't set error, to avoid recursion blowup. */
41 if (pthread_rwlock_init(lock, NULL) != 0) {
46 pthread_mutexattr_t attr;
49 if ((lock = OPENSSL_zalloc(sizeof(pthread_mutex_t))) == NULL) {
50 /* Don't set error, to avoid recursion blowup. */
55 * We don't use recursive mutexes, but try to catch errors if we do.
57 pthread_mutexattr_init(&attr);
58 # if !defined(NDEBUG) && !defined(OPENSSL_NO_MUTEX_ERRORCHECK)
59 pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
61 pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
64 if (pthread_mutex_init(lock, &attr) != 0) {
65 pthread_mutexattr_destroy(&attr);
70 pthread_mutexattr_destroy(&attr);
76 __owur int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
79 if (pthread_rwlock_rdlock(lock) != 0)
82 if (pthread_mutex_lock(lock) != 0) {
83 assert(errno != EDEADLK && errno != EBUSY);
91 __owur int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
94 if (pthread_rwlock_wrlock(lock) != 0)
97 if (pthread_mutex_lock(lock) != 0) {
98 assert(errno != EDEADLK && errno != EBUSY);
106 int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
109 if (pthread_rwlock_unlock(lock) != 0)
112 if (pthread_mutex_unlock(lock) != 0) {
113 assert(errno != EPERM);
121 void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock)
127 pthread_rwlock_destroy(lock);
129 pthread_mutex_destroy(lock);
136 int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
138 if (pthread_once(once, init) != 0)
144 int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
146 if (pthread_key_create(key, cleanup) != 0)
152 void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
154 return pthread_getspecific(*key);
157 int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
159 if (pthread_setspecific(*key, val) != 0)
165 int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
167 if (pthread_key_delete(*key) != 0)
173 CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
175 return pthread_self();
178 int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
180 return pthread_equal(a, b);
183 int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
185 # if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL)
186 if (__atomic_is_lock_free(sizeof(*val), val)) {
187 *ret = __atomic_add_fetch(val, amount, __ATOMIC_ACQ_REL);
190 # elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11))
191 /* This will work for all future Solaris versions. */
193 *ret = atomic_add_int_nv((volatile unsigned int *)val, amount);
197 if (lock == NULL || !CRYPTO_THREAD_write_lock(lock))
203 if (!CRYPTO_THREAD_unlock(lock))
209 int CRYPTO_atomic_or(uint64_t *val, uint64_t op, uint64_t *ret,
212 # if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL)
213 if (__atomic_is_lock_free(sizeof(*val), val)) {
214 *ret = __atomic_or_fetch(val, op, __ATOMIC_ACQ_REL);
217 # elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11))
218 /* This will work for all future Solaris versions. */
220 *ret = atomic_or_64_nv(val, op);
224 if (lock == NULL || !CRYPTO_THREAD_write_lock(lock))
229 if (!CRYPTO_THREAD_unlock(lock))
235 int CRYPTO_atomic_load(uint64_t *val, uint64_t *ret, CRYPTO_RWLOCK *lock)
237 # if defined(__GNUC__) && defined(__ATOMIC_ACQUIRE)
238 if (__atomic_is_lock_free(sizeof(*val), val)) {
239 __atomic_load(val, ret, __ATOMIC_ACQUIRE);
242 # elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11))
243 /* This will work for all future Solaris versions. */
245 *ret = atomic_or_64_nv(val, 0);
249 if (lock == NULL || !CRYPTO_THREAD_read_lock(lock))
252 if (!CRYPTO_THREAD_unlock(lock))
258 # ifdef OPENSSL_SYS_UNIX
260 static pthread_once_t fork_once_control = PTHREAD_ONCE_INIT;
262 static void fork_once_func(void)
264 # ifndef OPENSSL_NO_DEPRECATED_3_0
265 pthread_atfork(OPENSSL_fork_prepare,
266 OPENSSL_fork_parent, OPENSSL_fork_child);
271 int openssl_init_fork_handlers(void)
273 # ifdef OPENSSL_SYS_UNIX
274 if (pthread_once(&fork_once_control, fork_once_func) == 0)
279 # endif /* FIPS_MODULE */
281 int openssl_get_fork_id(void)