-/* ====================================================================
- * Copyright (c) 2016 The OpenSSL Project. All rights reserved.
+/*
+ * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
#include <openssl/crypto.h>
-#include "internal/threads.h"
+#include "internal/cryptlib.h"
#if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && !defined(OPENSSL_SYS_WINDOWS)
+# ifdef PTHREAD_RWLOCK_INITIALIZER
+# define USE_RWLOCK
+# endif
+
CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
{
- CRYPTO_RWLOCK *lock = OPENSSL_zalloc(sizeof(pthread_rwlock_t));
- if (lock == NULL)
+# ifdef USE_RWLOCK
+ CRYPTO_RWLOCK *lock;
+
+ if ((lock = OPENSSL_zalloc(sizeof(pthread_rwlock_t))) == NULL) {
+ /* Don't set error, to avoid recursion blowup. */
return NULL;
+ }
if (pthread_rwlock_init(lock, NULL) != 0) {
OPENSSL_free(lock);
return NULL;
}
+# else
+ pthread_mutexattr_t attr;
+ CRYPTO_RWLOCK *lock;
+
+ if ((lock = OPENSSL_zalloc(sizeof(pthread_mutex_t))) == NULL) {
+ /* Don't set error, to avoid recursion blowup. */
+ return NULL;
+ }
+
+ pthread_mutexattr_init(&attr);
+ pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+
+ if (pthread_mutex_init(lock, &attr) != 0) {
+ pthread_mutexattr_destroy(&attr);
+ OPENSSL_free(lock);
+ return NULL;
+ }
+
+ pthread_mutexattr_destroy(&attr);
+# endif
return lock;
}
int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
{
+# ifdef USE_RWLOCK
if (pthread_rwlock_rdlock(lock) != 0)
return 0;
+# else
+ if (pthread_mutex_lock(lock) != 0)
+ return 0;
+# endif
return 1;
}
int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
{
+# ifdef USE_RWLOCK
if (pthread_rwlock_wrlock(lock) != 0)
return 0;
+# else
+ if (pthread_mutex_lock(lock) != 0)
+ return 0;
+# endif
return 1;
}
int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
{
+# ifdef USE_RWLOCK
if (pthread_rwlock_unlock(lock) != 0)
return 0;
+# else
+ if (pthread_mutex_unlock(lock) != 0)
+ return 0;
+# endif
return 1;
}
if (lock == NULL)
return;
+# ifdef USE_RWLOCK
pthread_rwlock_destroy(lock);
+# else
+ pthread_mutex_destroy(lock);
+# endif
OPENSSL_free(lock);
return;
int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
{
-#ifdef __ATOMIC_RELAXED
- *ret = __atomic_add_fetch(val, amount, __ATOMIC_RELAXED);
-#else
+# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL)
+ if (__atomic_is_lock_free(sizeof(*val), val)) {
+ *ret = __atomic_add_fetch(val, amount, __ATOMIC_ACQ_REL);
+ return 1;
+ }
+# endif
if (!CRYPTO_THREAD_write_lock(lock))
return 0;
if (!CRYPTO_THREAD_unlock(lock))
return 0;
-#endif
return 1;
}
+# ifdef OPENSSL_SYS_UNIX
+static pthread_once_t fork_once_control = PTHREAD_ONCE_INIT;
+
+static void fork_once_func(void)
+{
+ pthread_atfork(OPENSSL_fork_prepare,
+ OPENSSL_fork_parent, OPENSSL_fork_child);
+}
+# endif
+
+int openssl_init_fork_handlers(void)
+{
+# ifdef OPENSSL_SYS_UNIX
+ if (pthread_once(&fork_once_control, fork_once_func) == 0)
+ return 1;
+# endif
+ return 0;
+}
#endif
projects / openssl.git / blobdiff