d2b863643d
CRYPTO_atomic_read was added with intention to read statistics counters, but readings are effectively indistinguishable from regular load (even in non-lock-free case). This is because you can get out-dated value in both cases. CRYPTO_atomic_write was added for symmetry and was never used. Reviewed-by: Kurt Roeckx <kurt@roeckx.be> (Merged from https://github.com/openssl/openssl/pull/6883)
136 lines
2.7 KiB
C
136 lines
2.7 KiB
C
/*
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* Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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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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*/
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#include <openssl/crypto.h>
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#include "internal/cryptlib.h"
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#if !defined(OPENSSL_THREADS) || defined(CRYPTO_TDEBUG)
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CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
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{
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CRYPTO_RWLOCK *lock;
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if ((lock = OPENSSL_zalloc(sizeof(unsigned int))) == NULL) {
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/* Don't set error, to avoid recursion blowup. */
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return NULL;
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}
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*(unsigned int *)lock = 1;
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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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if (!ossl_assert(*(unsigned int *)lock == 1))
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return 0;
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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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if (!ossl_assert(*(unsigned int *)lock == 1))
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return 0;
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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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if (!ossl_assert(*(unsigned int *)lock == 1))
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return 0;
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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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if (lock == NULL)
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return;
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*(unsigned int *)lock = 0;
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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 (*once != 0)
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return 1;
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init();
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*once = 1;
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return 1;
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}
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#define OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX 256
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static void *thread_local_storage[OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX];
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int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
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{
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static unsigned int thread_local_key = 0;
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if (thread_local_key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
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return 0;
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*key = thread_local_key++;
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thread_local_storage[*key] = NULL;
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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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if (*key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
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return NULL;
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return thread_local_storage[*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 (*key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
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return 0;
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thread_local_storage[*key] = val;
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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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*key = OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX + 1;
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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 0;
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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 (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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*val += amount;
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*ret = *val;
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return 1;
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}
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int openssl_init_fork_handlers(void)
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{
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return 0;
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}
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#endif
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