Added mbed_preprocessor.h to collect common cpp definitions

Author: geky

platform/mbed_assert.h

@@ -19,6 +19,8 @@
 #ifndef MBED_ASSERT_H
 #define MBED_ASSERT_H
 
+#include "mbed_preprocessor.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -50,10 +52,6 @@ do {                                                     \
 #endif
 
 
-#define _MBED_CONCAT_(a, b) a##b
-#define _MBED_CONCAT(a, b) _MBED_CONCAT_(a, b)
-#define _MBED_ASSERTION _MBED_CONCAT(_MBED_ASSERTION_AT_, __LINE__)
-
 /** MBED_STATIC_ASSERT
  *  Declare compile-time assertions, results in compile-time error if condition is false
  *
@@ -90,7 +88,8 @@ do {                                                     \
 #elif defined(__ICCARM__)
 #define MBED_STATIC_ASSERT(expr, msg) static_assert(expr, msg)
 #else
-#define MBED_STATIC_ASSERT(expr, msg) enum {_MBED_ASSERTION = sizeof(char[(expr) ? 1 : -1])}
+#define MBED_STATIC_ASSERT(expr, msg) \
+    enum {MBED_CONCAT(MBED_ASSERTION_AT_, __LINE__) = sizeof(char[(expr) ? 1 : -1])}
 #endif
 
 /** MBED_STRUCT_STATIC_ASSERT

platform/mbed_preprocessor.h

@@ -0,0 +1,53 @@
+/** \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_PREPROCESSOR_H
+#define MBED_PREPROCESSOR_H
+
+
+/** MBED_CONCAT
+ *  Concatenate tokens together
+ *
+ *  @note
+ *  Expands tokens before concatenation
+ *
+ *  @code
+ *  // Creates a unique label based on the line number
+ *  int MBED_CONCAT(UNIQUE_LABEL_, __LINE__) = 1;
+ *  @endcode
+ */
+#define MBED_CONCAT(a, b) MBED_CONCAT_(a, b)
+#define MBED_CONCAT_(a, b) a##b
+
+/** MBED_STRINGIFY
+ *  Converts tokens into strings
+ *
+ *  @note
+ *  Expands tokens before stringification
+ *
+ *  @code
+ *  // Creates a string based on the parameters
+ *  const char *c = MBED_STRINGIFY(This is a ridiculous way to create a string)
+ *  @endcode
+ */
+#define MBED_STRINGIFY(a) MBED_STRINGIFY_(a)
+#define MBED_STRINGIFY_(a) #a
+
+
+#endif
+
+/** @}*/

platform/toolchain.h

@@ -19,6 +19,8 @@
 #ifndef MBED_TOOLCHAIN_H
 #define MBED_TOOLCHAIN_H
 
+#include "mbed_preprocessor.h"
+
 
 // Warning for unsupported compilers
 #if !defined(__GNUC__)   /* GCC        */ \
@@ -65,8 +67,7 @@
  */
 #ifndef MBED_ALIGN
 #if defined(__ICCARM__)
-#define _MBED_ALIGN(N) _Pragma(#N)
-#define MBED_ALIGN(N) _MBED_ALIGN(data_alignment=N)
+#define MBED_ALIGN(N) _Pragma(MBED_STRINGIFY(data_alignment=N))
 #else
 #define MBED_ALIGN(N) __attribute__((aligned(N)))
 #endif