Diff: platform/mbed_assert.h

Revision:

0:f782d9c66c49

diff -r 000000000000 -r f782d9c66c49 platform/mbed_assert.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/platform/mbed_assert.h	Fri Feb 02 05:42:23 2018 +0000
@@ -0,0 +1,113 @@
+
+/** \addtogroup platform */
+/** @{*/
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MBED_ASSERT_H
+#define MBED_ASSERT_H
+
+#include "mbed_preprocessor.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Internal mbed assert function which is invoked when MBED_ASSERT macro failes.
+ *  This function is active only if NDEBUG is not defined prior to including this
+ *  assert header file.
+ *  In case of MBED_ASSERT failing condition, error() is called with the assertation message.
+ *  @param expr Expresion to be checked.
+ *  @param file File where assertation failed.
+ *  @param line Failing assertation line number.
+ */
+void mbed_assert_internal(const char *expr, const char *file, int line);
+
+#ifdef __cplusplus
+}
+#endif
+
+#ifdef NDEBUG
+#define MBED_ASSERT(expr) ((void)0)
+
+#else
+#define MBED_ASSERT(expr)                                \
+do {                                                     \
+    if (!(expr)) {                                       \
+        mbed_assert_internal(#expr, __FILE__, __LINE__); \
+    }                                                    \
+} while (0)
+#endif
+
+
+/** MBED_STATIC_ASSERT
+ *  Declare compile-time assertions, results in compile-time error if condition is false
+ *
+ *  The assertion acts as a declaration that can be placed at file scope, in a
+ *  code block (except after a label), or as a member of a C++ class/struct/union.
+ *
+ *  @note
+ *  Use of MBED_STATIC_ASSERT as a member of a struct/union is limited:
+ *  - In C++, MBED_STATIC_ASSERT is valid in class/struct/union scope.
+ *  - In C, MBED_STATIC_ASSERT is not valid in struct/union scope, and
+ *    MBED_STRUCT_STATIC_ASSERT is provided as an alternative that is valid
+ *    in C and C++ class/struct/union scope.
+ *
+ *  @code
+ *  MBED_STATIC_ASSERT(MBED_LIBRARY_VERSION >= 120,
+ *          "The mbed library must be at least version 120");
+ *
+ *  int main() {
+ *      MBED_STATIC_ASSERT(sizeof(int) >= sizeof(char),
+ *              "An int must be larger than a char");
+ *  }
+ *  @endcode
+ */
+#if defined(__cplusplus) && (__cplusplus >= 201103L || __cpp_static_assert >= 200410L)
+#define MBED_STATIC_ASSERT(expr, msg) static_assert(expr, msg)
+#elif !defined(__cplusplus) && __STDC_VERSION__ >= 201112L
+#define MBED_STATIC_ASSERT(expr, msg) _Static_assert(expr, msg)
+#elif defined(__cplusplus) && defined(__GNUC__) && defined(__GXX_EXPERIMENTAL_CXX0X__) \
+    && (__GNUC__*100 + __GNUC_MINOR__) > 403L
+#define MBED_STATIC_ASSERT(expr, msg) __extension__ static_assert(expr, msg)
+#elif !defined(__cplusplus) && defined(__GNUC__) && !defined(__CC_ARM) \
+    && (__GNUC__*100 + __GNUC_MINOR__) > 406L
+#define MBED_STATIC_ASSERT(expr, msg) __extension__ _Static_assert(expr, msg)
+#elif defined(__ICCARM__)
+#define MBED_STATIC_ASSERT(expr, msg) static_assert(expr, msg)
+#else
+#define MBED_STATIC_ASSERT(expr, msg) \
+    enum {MBED_CONCAT(MBED_ASSERTION_AT_, __LINE__) = sizeof(char[(expr) ? 1 : -1])}
+#endif
+
+/** MBED_STRUCT_STATIC_ASSERT
+ *  Declare compile-time assertions, results in compile-time error if condition is false
+ *
+ *  Unlike MBED_STATIC_ASSERT, MBED_STRUCT_STATIC_ASSERT can and must be used
+ *  as a member of a C/C++ class/struct/union.
+ *
+ *  @code
+ *  struct thing {
+ *      MBED_STATIC_ASSERT(2 + 2 == 4,
+ *              "Hopefully the universe is mathematically consistent");
+ *  };
+ *  @endcode
+ */
+#define MBED_STRUCT_STATIC_ASSERT(expr, msg) int : (expr) ? 0 : -1
+
+
+#endif
+
+/** @}*/