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45 lines
1.8 KiB
45 lines
1.8 KiB
/* |
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* Copyright 1995-2016 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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#define DEFINE_RUN_ONCE(init) \ |
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static int init(void); \ |
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int init##_ossl_ret_ = 0; \ |
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void init##_ossl_(void) \ |
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{ \ |
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init##_ossl_ret_ = init(); \ |
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} \ |
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static int init(void) |
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#define DECLARE_RUN_ONCE(init) \ |
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extern int init##_ossl_ret_; \ |
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void init##_ossl_(void); |
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#define DEFINE_RUN_ONCE_STATIC(init) \ |
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static int init(void); \ |
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static int init##_ossl_ret_ = 0; \ |
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static void init##_ossl_(void) \ |
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{ \ |
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init##_ossl_ret_ = init(); \ |
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} \ |
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static int init(void) |
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/* |
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* RUN_ONCE - use CRYPTO_THREAD_run_once, and check if the init succeeded |
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* @once: pointer to static object of type CRYPTO_ONCE |
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* @init: function name that was previously given to DEFINE_RUN_ONCE, |
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* DEFINE_RUN_ONCE_STATIC or DECLARE_RUN_ONCE. This function |
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* must return 1 for success or 0 for failure. |
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* |
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* The return value is 1 on success (*) or 0 in case of error. |
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* |
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* (*) by convention, since the init function must return 1 on success. |
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*/ |
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#define RUN_ONCE(once, init) \ |
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(CRYPTO_THREAD_run_once(once, init##_ossl_) ? init##_ossl_ret_ : 0)
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