5ecfb10d54
The change seems to have stuck, so bring us closer to C/++11 static asserts. (If we later find we need to support worse toolchains, we can always use __LINE__ or __COUNTER__ to avoid duplicate typedef names and just punt on embedding the message into the type name.) Change-Id: I0e5bb1106405066f07740728e19ebe13cae3e0ee Reviewed-on: https://boringssl-review.googlesource.com/c/33145 Commit-Queue: Adam Langley <agl@google.com> Reviewed-by: Adam Langley <agl@google.com> CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/* Copyright (c) 2015, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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#include "internal.h"
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#include <stdlib.h>
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#include <openssl/type_check.h>
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#if !defined(OPENSSL_C11_ATOMIC)
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OPENSSL_STATIC_ASSERT((CRYPTO_refcount_t)-1 == CRYPTO_REFCOUNT_MAX,
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"CRYPTO_REFCOUNT_MAX is incorrect");
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static struct CRYPTO_STATIC_MUTEX g_refcount_lock = CRYPTO_STATIC_MUTEX_INIT;
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void CRYPTO_refcount_inc(CRYPTO_refcount_t *count) {
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CRYPTO_STATIC_MUTEX_lock_write(&g_refcount_lock);
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if (*count < CRYPTO_REFCOUNT_MAX) {
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(*count)++;
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}
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CRYPTO_STATIC_MUTEX_unlock_write(&g_refcount_lock);
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}
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int CRYPTO_refcount_dec_and_test_zero(CRYPTO_refcount_t *count) {
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int ret;
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CRYPTO_STATIC_MUTEX_lock_write(&g_refcount_lock);
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if (*count == 0) {
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abort();
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}
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if (*count < CRYPTO_REFCOUNT_MAX) {
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(*count)--;
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}
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ret = (*count == 0);
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CRYPTO_STATIC_MUTEX_unlock_write(&g_refcount_lock);
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return ret;
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}
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#endif // OPENSSL_C11_ATOMIC
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