diff options
| -rw-r--r-- | include/internal/thread_once.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/include/internal/thread_once.h b/include/internal/thread_once.h new file mode 100644 index 0000000000..74f6ccb238 --- /dev/null +++ b/include/internal/thread_once.h @@ -0,0 +1,42 @@ +/* + * 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. + * + * The return value is 1 on success or 0 in case of error. + */ +#define RUN_ONCE(once, init) \ + (CRYPTO_THREAD_run_once(once, init##_ossl_) ? init##_ossl_ret_ : 0) |