A local copy of OpenSSL from GitHub
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/*
* Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
*
* 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>
#if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && !defined(OPENSSL_SYS_WINDOWS)
CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
{
CRYPTO_RWLOCK *lock = OPENSSL_zalloc(sizeof(pthread_rwlock_t));
if (lock == NULL)
return NULL;
if (pthread_rwlock_init(lock, NULL) != 0) {
OPENSSL_free(lock);
return NULL;
}
return lock;
}
int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
{
if (pthread_rwlock_rdlock(lock) != 0)
return 0;
return 1;
}
int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
{
if (pthread_rwlock_wrlock(lock) != 0)
return 0;
return 1;
}
int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
{
if (pthread_rwlock_unlock(lock) != 0)
return 0;
return 1;
}
void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock)
{
if (lock == NULL)
return;
pthread_rwlock_destroy(lock);
OPENSSL_free(lock);
return;
}
int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
{
if (pthread_once(once, init) != 0)
return 0;
return 1;
}
int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
{
if (pthread_key_create(key, cleanup) != 0)
return 0;
return 1;
}
void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
{
return pthread_getspecific(*key);
}
int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
{
if (pthread_setspecific(*key, val) != 0)
return 0;
return 1;
}
int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
{
if (pthread_key_delete(*key) != 0)
return 0;
return 1;
}
CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
{
return pthread_self();
}
int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
{
return pthread_equal(a, b);
}
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 (!CRYPTO_THREAD_write_lock(lock))
return 0;
*val += amount;
*ret = *val;
if (!CRYPTO_THREAD_unlock(lock))
return 0;
#endif
return 1;
}
#endif