/* * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #include <openssl/crypto.h> #define DEFINE_RUN_ONCE(init) \ static int init(void); \ int init##_ossl_ret_ = 0; \ void init##_ossl_(void) \ { \ init##_ossl_ret_ = init(); \ } \ static int init(void) #define DECLARE_RUN_ONCE(init) \ extern int init##_ossl_ret_; \ void init##_ossl_(void); #define DEFINE_RUN_ONCE_STATIC(init) \ static int init(void); \ static int init##_ossl_ret_ = 0; \ static void init##_ossl_(void) \ { \ init##_ossl_ret_ = init(); \ } \ static int init(void) /* * RUN_ONCE - use CRYPTO_THREAD_run_once, and check if the init succeeded * @once: pointer to static object of type CRYPTO_ONCE * @init: function name that was previously given to DEFINE_RUN_ONCE, * DEFINE_RUN_ONCE_STATIC or DECLARE_RUN_ONCE. This function * must return 1 for success or 0 for failure. * * The return value is 1 on success (*) or 0 in case of error. * * (*) by convention, since the init function must return 1 on success. */ #define RUN_ONCE(once, init) \ (CRYPTO_THREAD_run_once(once, init##_ossl_) ? init##_ossl_ret_ : 0) |