2 * Copyright 2016-2018 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 pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
54 if (pthread_mutex_init(lock, &attr) != 0) {
55 pthread_mutexattr_destroy(&attr);
60 pthread_mutexattr_destroy(&attr);
66 int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
69 if (pthread_rwlock_rdlock(lock) != 0)
72 if (pthread_mutex_lock(lock) != 0)
79 int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
82 if (pthread_rwlock_wrlock(lock) != 0)
85 if (pthread_mutex_lock(lock) != 0)
92 int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
95 if (pthread_rwlock_unlock(lock) != 0)
98 if (pthread_mutex_unlock(lock) != 0)
105 void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock)
111 pthread_rwlock_destroy(lock);
113 pthread_mutex_destroy(lock);
120 int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
122 if (pthread_once(once, init) != 0)
128 int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
130 if (pthread_key_create(key, cleanup) != 0)
136 void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
138 return pthread_getspecific(*key);
141 int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
143 if (pthread_setspecific(*key, val) != 0)
149 int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
151 if (pthread_key_delete(*key) != 0)
157 CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
159 return pthread_self();
162 int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
164 return pthread_equal(a, b);
167 int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
169 # if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL)
170 if (__atomic_is_lock_free(sizeof(*val), val)) {
171 *ret = __atomic_add_fetch(val, amount, __ATOMIC_ACQ_REL);
174 # elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11))
175 /* This will work for all future Solaris versions. */
177 *ret = atomic_add_int_nv((volatile unsigned int *)val, amount);
181 if (!CRYPTO_THREAD_write_lock(lock))
187 if (!CRYPTO_THREAD_unlock(lock))
194 /* TODO(3.0): No fork protection in FIPS module yet! */
196 # ifdef OPENSSL_SYS_UNIX
197 static pthread_once_t fork_once_control = PTHREAD_ONCE_INIT;
199 static void fork_once_func(void)
201 pthread_atfork(OPENSSL_fork_prepare,
202 OPENSSL_fork_parent, OPENSSL_fork_child);
206 int openssl_init_fork_handlers(void)
208 # ifdef OPENSSL_SYS_UNIX
209 if (pthread_once(&fork_once_control, fork_once_func) == 0)
214 # endif /* FIPS_MODE */
216 int openssl_get_fork_id(void)