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- /* Copyright (c) 2015, Google Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
-
- #include "internal.h"
-
- #include <stdlib.h>
-
- #include <openssl/type_check.h>
-
-
- #if !defined(OPENSSL_C11_ATOMIC)
-
- OPENSSL_COMPILE_ASSERT((CRYPTO_refcount_t)-1 == CRYPTO_REFCOUNT_MAX,
- CRYPTO_REFCOUNT_MAX_is_incorrect);
-
- static struct CRYPTO_STATIC_MUTEX g_refcount_lock = CRYPTO_STATIC_MUTEX_INIT;
-
- void CRYPTO_refcount_inc(CRYPTO_refcount_t *count) {
- CRYPTO_STATIC_MUTEX_lock_write(&g_refcount_lock);
- if (*count < CRYPTO_REFCOUNT_MAX) {
- (*count)++;
- }
- CRYPTO_STATIC_MUTEX_unlock(&g_refcount_lock);
- }
-
- int CRYPTO_refcount_dec_and_test_zero(CRYPTO_refcount_t *count) {
- int ret;
-
- CRYPTO_STATIC_MUTEX_lock_write(&g_refcount_lock);
- if (*count == 0) {
- abort();
- }
- if (*count < CRYPTO_REFCOUNT_MAX) {
- (*count)--;
- }
- ret = (*count == 0);
- CRYPTO_STATIC_MUTEX_unlock(&g_refcount_lock);
-
- return ret;
- }
-
- #endif /* OPENSSL_C11_ATOMIC */
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