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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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