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New macro MBEDTLS_CHECK_RETURN

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Put this macro before a function declaration to indicate that its result
must be checked. This commit supports GCC-like compilers and MSVC >=2012.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2021-07-07 21:02:36 +02:00
parent b19be6b5f3
commit 4b627af36c
1 changed files with 18 additions and 0 deletions
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18
include/mbedtls/build_info.h
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@ -53,6 +53,24 @@
#define _CRT_SECURE_NO_DEPRECATE 1
#endif
/** \def MBEDTLS_CHECK_RETURN
*
* This macro appearing at the beginning of the declaration of a function
* indicates that its return value should be checked.
*
* This should appear before most functions returning an error code
* (as \c int in the \c mbedtls_xxx API or
* as ::psa_status_t in the \c psa_xxx API).
*/
#if defined(__GNUC__)
#define MBEDTLS_CHECK_RETURN __attribute__((warn_unused_result))
#elif defined(_MSC_VER) && _MSC_VER >= 1700
#include <sal.h>
#define MBEDTLS_CHECK_RETURN _Check_return_
#else
#define MBEDTLS_CHECK_RETURN
#endif
#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/mbedtls_config.h"
#else