Mirror of BoringSSL (grpc依赖)
https://boringssl.googlesource.com/boringssl
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52 lines
1.6 KiB
52 lines
1.6 KiB
/* 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 <assert.h> |
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#include <stdlib.h> |
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#if !defined(OPENSSL_C11_ATOMIC) |
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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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