Move MBEDTLS_CHECK_RETURN to platform_util.
Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
diff --git a/include/mbedtls/platform_util.h b/include/mbedtls/platform_util.h
index 1a0a135..9c64cfd 100644
--- a/include/mbedtls/platform_util.h
+++ b/include/mbedtls/platform_util.h
@@ -60,6 +60,26 @@
#endif /* MBEDTLS_DEPRECATED_WARNING */
#endif /* MBEDTLS_DEPRECATED_REMOVED */
+/** \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(MBEDTLS_CHECK_RETURN)
+#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
+#endif
+
/**
* \brief Securely zeroize a buffer
*