2016-05-18 02:52:22 +08:00
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/*
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2018-04-17 21:18:40 +08:00
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* Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
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2015-10-26 00:43:55 +08:00
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*
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2018-12-06 21:03:01 +08:00
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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2016-05-18 02:52:22 +08:00
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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2015-10-26 00:43:55 +08:00
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*/
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#include <openssl/crypto.h>
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2017-08-04 04:21:01 +08:00
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#include "internal/cryptlib.h"
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2015-10-26 00:43:55 +08:00
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2019-06-21 16:31:05 +08:00
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#if defined(__sun)
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# include <atomic.h>
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#endif
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2015-10-26 00:43:55 +08:00
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#if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && !defined(OPENSSL_SYS_WINDOWS)
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2019-05-28 03:03:09 +08:00
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# if defined(OPENSSL_SYS_UNIX)
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# include <sys/types.h>
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# include <unistd.h>
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#endif
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2016-11-29 01:54:43 +08:00
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# ifdef PTHREAD_RWLOCK_INITIALIZER
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# define USE_RWLOCK
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# endif
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2016-11-23 00:37:43 +08:00
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2015-10-26 00:43:55 +08:00
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CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
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{
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2016-11-29 01:54:43 +08:00
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# ifdef USE_RWLOCK
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2018-04-06 03:13:55 +08:00
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CRYPTO_RWLOCK *lock;
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if ((lock = OPENSSL_zalloc(sizeof(pthread_rwlock_t))) == NULL) {
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/* Don't set error, to avoid recursion blowup. */
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2015-10-26 00:43:55 +08:00
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return NULL;
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2018-04-06 03:13:55 +08:00
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}
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2015-10-26 00:43:55 +08:00
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2016-03-02 04:59:48 +08:00
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if (pthread_rwlock_init(lock, NULL) != 0) {
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OPENSSL_free(lock);
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2015-10-26 00:43:55 +08:00
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return NULL;
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2016-03-02 04:59:48 +08:00
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}
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2016-11-29 01:54:43 +08:00
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# else
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pthread_mutexattr_t attr;
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2018-04-06 03:13:55 +08:00
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CRYPTO_RWLOCK *lock;
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if ((lock = OPENSSL_zalloc(sizeof(pthread_mutex_t))) == NULL) {
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/* Don't set error, to avoid recursion blowup. */
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2016-11-23 00:37:43 +08:00
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return NULL;
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2018-04-06 03:13:55 +08:00
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}
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2016-11-23 00:37:43 +08:00
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pthread_mutexattr_init(&attr);
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pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
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2016-11-29 02:16:34 +08:00
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2016-11-23 00:37:43 +08:00
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if (pthread_mutex_init(lock, &attr) != 0) {
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pthread_mutexattr_destroy(&attr);
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OPENSSL_free(lock);
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return NULL;
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}
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2016-11-29 02:16:34 +08:00
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2016-11-23 00:37:43 +08:00
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pthread_mutexattr_destroy(&attr);
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2016-11-29 01:54:43 +08:00
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# endif
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2015-10-26 00:43:55 +08:00
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return lock;
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}
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int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
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{
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2016-11-29 01:54:43 +08:00
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# ifdef USE_RWLOCK
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2015-10-26 00:43:55 +08:00
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if (pthread_rwlock_rdlock(lock) != 0)
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return 0;
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2016-11-29 01:54:43 +08:00
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# else
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2016-11-23 00:37:43 +08:00
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if (pthread_mutex_lock(lock) != 0)
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return 0;
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2016-11-29 01:54:43 +08:00
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# endif
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2015-10-26 00:43:55 +08:00
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return 1;
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}
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int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
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{
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2016-11-29 01:54:43 +08:00
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# ifdef USE_RWLOCK
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2015-10-26 00:43:55 +08:00
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if (pthread_rwlock_wrlock(lock) != 0)
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return 0;
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2016-11-29 01:54:43 +08:00
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# else
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2016-11-23 00:37:43 +08:00
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if (pthread_mutex_lock(lock) != 0)
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return 0;
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2016-11-29 01:54:43 +08:00
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# endif
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2015-10-26 00:43:55 +08:00
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return 1;
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}
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int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
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{
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2016-11-29 01:54:43 +08:00
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# ifdef USE_RWLOCK
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2015-10-26 00:43:55 +08:00
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if (pthread_rwlock_unlock(lock) != 0)
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return 0;
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2016-11-29 01:54:43 +08:00
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# else
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2016-11-23 00:37:43 +08:00
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if (pthread_mutex_unlock(lock) != 0)
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return 0;
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2016-11-29 01:54:43 +08:00
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# endif
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2015-10-26 00:43:55 +08:00
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return 1;
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}
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void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock)
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{
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if (lock == NULL)
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return;
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2016-11-29 01:54:43 +08:00
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# ifdef USE_RWLOCK
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2015-10-26 00:43:55 +08:00
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pthread_rwlock_destroy(lock);
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2016-11-29 01:54:43 +08:00
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# else
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2016-11-23 00:37:43 +08:00
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pthread_mutex_destroy(lock);
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2016-11-29 01:54:43 +08:00
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# endif
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2015-10-26 00:43:55 +08:00
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OPENSSL_free(lock);
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return;
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}
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int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
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{
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if (pthread_once(once, init) != 0)
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return 0;
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return 1;
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}
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int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
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{
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if (pthread_key_create(key, cleanup) != 0)
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return 0;
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return 1;
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}
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void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
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{
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return pthread_getspecific(*key);
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}
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int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
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{
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if (pthread_setspecific(*key, val) != 0)
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return 0;
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return 1;
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}
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int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
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{
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if (pthread_key_delete(*key) != 0)
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return 0;
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return 1;
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}
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CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
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{
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return pthread_self();
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}
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int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
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{
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return pthread_equal(a, b);
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}
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int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
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{
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2016-08-24 18:01:39 +08:00
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# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL)
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2016-08-24 15:14:44 +08:00
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if (__atomic_is_lock_free(sizeof(*val), val)) {
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*ret = __atomic_add_fetch(val, amount, __ATOMIC_ACQ_REL);
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return 1;
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}
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2019-06-21 16:31:05 +08:00
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# elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11))
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/* This will work for all future Solaris versions. */
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if (ret != NULL) {
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*ret = atomic_add_int_nv((volatile unsigned int *)val, amount);
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return 1;
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}
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2016-08-24 15:14:44 +08:00
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# endif
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2015-10-26 00:43:55 +08:00
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if (!CRYPTO_THREAD_write_lock(lock))
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return 0;
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*val += amount;
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*ret = *val;
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if (!CRYPTO_THREAD_unlock(lock))
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return 0;
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return 1;
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}
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2019-04-10 22:01:40 +08:00
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# ifndef FIPS_MODE
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/* TODO(3.0): No fork protection in FIPS module yet! */
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# ifdef OPENSSL_SYS_UNIX
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2017-08-18 23:47:21 +08:00
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static pthread_once_t fork_once_control = PTHREAD_ONCE_INIT;
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static void fork_once_func(void)
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{
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pthread_atfork(OPENSSL_fork_prepare,
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OPENSSL_fork_parent, OPENSSL_fork_child);
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}
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2019-04-10 22:01:40 +08:00
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# endif
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2017-08-18 23:47:21 +08:00
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2017-06-23 02:00:06 +08:00
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int openssl_init_fork_handlers(void)
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{
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2019-04-10 22:01:40 +08:00
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# ifdef OPENSSL_SYS_UNIX
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2017-08-18 23:47:21 +08:00
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if (pthread_once(&fork_once_control, fork_once_func) == 0)
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2017-06-23 02:00:06 +08:00
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return 1;
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2019-04-10 22:01:40 +08:00
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# endif
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2017-06-23 02:00:06 +08:00
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return 0;
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}
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2019-04-10 22:01:40 +08:00
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# endif /* FIPS_MODE */
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2019-05-28 03:03:09 +08:00
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int openssl_get_fork_id(void)
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{
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return getpid();
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}
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2015-10-26 00:43:55 +08:00
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#endif
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