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platform/mbed_assert.h@135:fce8a9387ed1, 2017-01-17 (annotated)

Committer:
kaoshen
Date:
Tue Jan 17 23:27:32 2017 +0000
Revision:
135:fce8a9387ed1
Parent:
130:d75b3fe1f5cb 
333 ADS1115 ADC1

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<> 128:9bcdf88f62b0 1
<> 128:9bcdf88f62b0 2 /** \addtogroup platform */
<> 128:9bcdf88f62b0 3 /** @{*/
<> 128:9bcdf88f62b0 4 /* mbed Microcontroller Library
<> 128:9bcdf88f62b0 5 * Copyright (c) 2006-2013 ARM Limited
<> 128:9bcdf88f62b0 6 *
<> 128:9bcdf88f62b0 7 * Licensed under the Apache License, Version 2.0 (the "License");
<> 128:9bcdf88f62b0 8 * you may not use this file except in compliance with the License.
<> 128:9bcdf88f62b0 9 * You may obtain a copy of the License at
<> 128:9bcdf88f62b0 10 *
<> 128:9bcdf88f62b0 11 * http://www.apache.org/licenses/LICENSE-2.0
<> 128:9bcdf88f62b0 12 *
<> 128:9bcdf88f62b0 13 * Unless required by applicable law or agreed to in writing, software
<> 128:9bcdf88f62b0 14 * distributed under the License is distributed on an "AS IS" BASIS,
<> 128:9bcdf88f62b0 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 128:9bcdf88f62b0 16 * See the License for the specific language governing permissions and
<> 128:9bcdf88f62b0 17 * limitations under the License.
<> 128:9bcdf88f62b0 18 */
<> 128:9bcdf88f62b0 19 #ifndef MBED_ASSERT_H
<> 128:9bcdf88f62b0 20 #define MBED_ASSERT_H
<> 128:9bcdf88f62b0 21
<> 130:d75b3fe1f5cb 22 #include "mbed_preprocessor.h"
<> 130:d75b3fe1f5cb 23
<> 128:9bcdf88f62b0 24 #ifdef __cplusplus
<> 128:9bcdf88f62b0 25 extern "C" {
<> 128:9bcdf88f62b0 26 #endif
<> 128:9bcdf88f62b0 27
<> 128:9bcdf88f62b0 28 /** Internal mbed assert function which is invoked when MBED_ASSERT macro failes.
<> 128:9bcdf88f62b0 29 * This function is active only if NDEBUG is not defined prior to including this
<> 128:9bcdf88f62b0 30 * assert header file.
<> 128:9bcdf88f62b0 31 * In case of MBED_ASSERT failing condition, error() is called with the assertation message.
<> 128:9bcdf88f62b0 32 * @param expr Expresion to be checked.
<> 128:9bcdf88f62b0 33 * @param file File where assertation failed.
<> 128:9bcdf88f62b0 34 * @param line Failing assertation line number.
<> 128:9bcdf88f62b0 35 */
<> 128:9bcdf88f62b0 36 void mbed_assert_internal(const char *expr, const char *file, int line);
<> 128:9bcdf88f62b0 37
<> 128:9bcdf88f62b0 38 #ifdef __cplusplus
<> 128:9bcdf88f62b0 39 }
<> 128:9bcdf88f62b0 40 #endif
<> 128:9bcdf88f62b0 41
<> 128:9bcdf88f62b0 42 #ifdef NDEBUG
<> 128:9bcdf88f62b0 43 #define MBED_ASSERT(expr) ((void)0)
<> 128:9bcdf88f62b0 44
<> 128:9bcdf88f62b0 45 #else
<> 128:9bcdf88f62b0 46 #define MBED_ASSERT(expr) \
<> 128:9bcdf88f62b0 47 do { \
<> 128:9bcdf88f62b0 48 if (!(expr)) { \
<> 128:9bcdf88f62b0 49 mbed_assert_internal(#expr, __FILE__, __LINE__); \
<> 128:9bcdf88f62b0 50 } \
<> 128:9bcdf88f62b0 51 } while (0)
<> 128:9bcdf88f62b0 52 #endif
<> 128:9bcdf88f62b0 53
<> 130:d75b3fe1f5cb 54
<> 130:d75b3fe1f5cb 55 /** MBED_STATIC_ASSERT
<> 130:d75b3fe1f5cb 56 * Declare compile-time assertions, results in compile-time error if condition is false
<> 130:d75b3fe1f5cb 57 *
<> 130:d75b3fe1f5cb 58 * The assertion acts as a declaration that can be placed at file scope, in a
<> 130:d75b3fe1f5cb 59 * code block (except after a label), or as a member of a C++ class/struct/union.
<> 130:d75b3fe1f5cb 60 *
<> 130:d75b3fe1f5cb 61 * @note
<> 130:d75b3fe1f5cb 62 * Use of MBED_STATIC_ASSERT as a member of a struct/union is limited:
<> 130:d75b3fe1f5cb 63 * - In C++, MBED_STATIC_ASSERT is valid in class/struct/union scope.
<> 130:d75b3fe1f5cb 64 * - In C, MBED_STATIC_ASSERT is not valid in struct/union scope, and
<> 130:d75b3fe1f5cb 65 * MBED_STRUCT_STATIC_ASSERT is provided as an alternative that is valid
<> 130:d75b3fe1f5cb 66 * in C and C++ class/struct/union scope.
<> 130:d75b3fe1f5cb 67 *
<> 130:d75b3fe1f5cb 68 * @code
<> 130:d75b3fe1f5cb 69 * MBED_STATIC_ASSERT(MBED_LIBRARY_VERSION >= 120,
<> 130:d75b3fe1f5cb 70 * "The mbed library must be at least version 120");
<> 130:d75b3fe1f5cb 71 *
<> 130:d75b3fe1f5cb 72 * int main() {
<> 130:d75b3fe1f5cb 73 * MBED_STATIC_ASSERT(sizeof(int) >= sizeof(char),
<> 130:d75b3fe1f5cb 74 * "An int must be larger than a char");
<> 130:d75b3fe1f5cb 75 * }
<> 130:d75b3fe1f5cb 76 * @endcode
<> 130:d75b3fe1f5cb 77 */
<> 130:d75b3fe1f5cb 78 #if defined(__cplusplus) && (__cplusplus >= 201103L || __cpp_static_assert >= 200410L)
<> 130:d75b3fe1f5cb 79 #define MBED_STATIC_ASSERT(expr, msg) static_assert(expr, msg)
<> 130:d75b3fe1f5cb 80 #elif !defined(__cplusplus) && __STDC_VERSION__ >= 201112L
<> 130:d75b3fe1f5cb 81 #define MBED_STATIC_ASSERT(expr, msg) _Static_assert(expr, msg)
<> 130:d75b3fe1f5cb 82 #elif defined(__cplusplus) && defined(__GNUC__) && defined(__GXX_EXPERIMENTAL_CXX0X__) \
<> 130:d75b3fe1f5cb 83 && (__GNUC__*100 + __GNUC_MINOR__) > 403L
<> 130:d75b3fe1f5cb 84 #define MBED_STATIC_ASSERT(expr, msg) __extension__ static_assert(expr, msg)
<> 130:d75b3fe1f5cb 85 #elif !defined(__cplusplus) && defined(__GNUC__) && !defined(__CC_ARM) \
<> 130:d75b3fe1f5cb 86 && (__GNUC__*100 + __GNUC_MINOR__) > 406L
<> 130:d75b3fe1f5cb 87 #define MBED_STATIC_ASSERT(expr, msg) __extension__ _Static_assert(expr, msg)
<> 130:d75b3fe1f5cb 88 #elif defined(__ICCARM__)
<> 130:d75b3fe1f5cb 89 #define MBED_STATIC_ASSERT(expr, msg) static_assert(expr, msg)
<> 130:d75b3fe1f5cb 90 #else
<> 130:d75b3fe1f5cb 91 #define MBED_STATIC_ASSERT(expr, msg) \
<> 130:d75b3fe1f5cb 92 enum {MBED_CONCAT(MBED_ASSERTION_AT_, __LINE__) = sizeof(char[(expr) ? 1 : -1])}
<> 130:d75b3fe1f5cb 93 #endif
<> 130:d75b3fe1f5cb 94
<> 130:d75b3fe1f5cb 95 /** MBED_STRUCT_STATIC_ASSERT
<> 130:d75b3fe1f5cb 96 * Declare compile-time assertions, results in compile-time error if condition is false
<> 130:d75b3fe1f5cb 97 *
<> 130:d75b3fe1f5cb 98 * Unlike MBED_STATIC_ASSERT, MBED_STRUCT_STATIC_ASSERT can and must be used
<> 130:d75b3fe1f5cb 99 * as a member of a C/C++ class/struct/union.
<> 130:d75b3fe1f5cb 100 *
<> 130:d75b3fe1f5cb 101 * @code
<> 130:d75b3fe1f5cb 102 * struct thing {
<> 130:d75b3fe1f5cb 103 * MBED_STATIC_ASSERT(2 + 2 == 4,
<> 130:d75b3fe1f5cb 104 * "Hopefully the universe is mathematically consistent");
<> 130:d75b3fe1f5cb 105 * };
<> 130:d75b3fe1f5cb 106 * @endcode
<> 130:d75b3fe1f5cb 107 */
<> 130:d75b3fe1f5cb 108 #define MBED_STRUCT_STATIC_ASSERT(expr, msg) int : (expr) ? 0 : -1
<> 130:d75b3fe1f5cb 109
<> 130:d75b3fe1f5cb 110
<> 128:9bcdf88f62b0 111 #endif
<> 128:9bcdf88f62b0 112
<> 128:9bcdf88f62b0 113 /** @}*/