Emilio Monti / mbed-KL25Z

mbed libraries for KL25Z

Dependents:   FRDM_RGBLED

FunctionPointer.h@0:8024c367e29f, 2012-10-05 (annotated)

Committer:
emilmont
Date:
Fri Oct 05 09:16:41 2012 +0000
Revision:
0:8024c367e29f
Child:
7:73c5efe92a6c
First release of the mbed libraries for KL25Z

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 0:8024c367e29f 1 /* mbed Microcontroller Library - FunctionPointer
emilmont 0:8024c367e29f 2 * Copyright (c) 2007-2009 ARM Limited. All rights reserved.
emilmont 0:8024c367e29f 3 */
emilmont 0:8024c367e29f 4
emilmont 0:8024c367e29f 5 #ifndef MBED_FUNCTIONPOINTER_H
emilmont 0:8024c367e29f 6 #define MBED_FUNCTIONPOINTER_H
emilmont 0:8024c367e29f 7
emilmont 0:8024c367e29f 8 #include <string.h>
emilmont 0:8024c367e29f 9
emilmont 0:8024c367e29f 10 namespace mbed {
emilmont 0:8024c367e29f 11
emilmont 0:8024c367e29f 12 /* Class FunctionPointer
emilmont 0:8024c367e29f 13 * A class for storing and calling a pointer to a static or member void function
emilmont 0:8024c367e29f 14 */
emilmont 0:8024c367e29f 15 class FunctionPointer {
emilmont 0:8024c367e29f 16
emilmont 0:8024c367e29f 17 public:
emilmont 0:8024c367e29f 18
emilmont 0:8024c367e29f 19 /* Constructor FunctionPointer
emilmont 0:8024c367e29f 20 * Create a FunctionPointer, attaching a static function
emilmont 0:8024c367e29f 21 *
emilmont 0:8024c367e29f 22 * Variables
emilmont 0:8024c367e29f 23 * function - The void static function to attach (default is none)
emilmont 0:8024c367e29f 24 */
emilmont 0:8024c367e29f 25 FunctionPointer(void (*function)(void) = 0);
emilmont 0:8024c367e29f 26
emilmont 0:8024c367e29f 27 /* Constructor FunctionPointer
emilmont 0:8024c367e29f 28 * Create a FunctionPointer, attaching a member function
emilmont 0:8024c367e29f 29 *
emilmont 0:8024c367e29f 30 * Variables
emilmont 0:8024c367e29f 31 * object - The object pointer to invoke the member function on (i.e. the this pointer)
emilmont 0:8024c367e29f 32 * function - The address of the void member function to attach
emilmont 0:8024c367e29f 33 */
emilmont 0:8024c367e29f 34 template<typename T>
emilmont 0:8024c367e29f 35 FunctionPointer(T *object, void (T::*member)(void)) {
emilmont 0:8024c367e29f 36 attach(object, member);
emilmont 0:8024c367e29f 37 }
emilmont 0:8024c367e29f 38
emilmont 0:8024c367e29f 39 /* Function attach
emilmont 0:8024c367e29f 40 * Attach a static function
emilmont 0:8024c367e29f 41 *
emilmont 0:8024c367e29f 42 * Variables
emilmont 0:8024c367e29f 43 * function - The void static function to attach (default is none)
emilmont 0:8024c367e29f 44 */
emilmont 0:8024c367e29f 45 void attach(void (*function)(void) = 0);
emilmont 0:8024c367e29f 46
emilmont 0:8024c367e29f 47 /* Function attach
emilmont 0:8024c367e29f 48 * Attach a member function
emilmont 0:8024c367e29f 49 *
emilmont 0:8024c367e29f 50 * Variables
emilmont 0:8024c367e29f 51 * object - The object pointer to invoke the member function on (i.e. the this pointer)
emilmont 0:8024c367e29f 52 * function - The address of the void member function to attach
emilmont 0:8024c367e29f 53 */
emilmont 0:8024c367e29f 54 template<typename T>
emilmont 0:8024c367e29f 55 void attach(T *object, void (T::*member)(void)) {
emilmont 0:8024c367e29f 56 _object = static_cast<void*>(object);
emilmont 0:8024c367e29f 57 memcpy(_member, (char*)&member, sizeof(member));
emilmont 0:8024c367e29f 58 _membercaller = &FunctionPointer::membercaller<T>;
emilmont 0:8024c367e29f 59 _function = 0;
emilmont 0:8024c367e29f 60 }
emilmont 0:8024c367e29f 61
emilmont 0:8024c367e29f 62 /* Function call
emilmont 0:8024c367e29f 63 * Call the attached static or member function
emilmont 0:8024c367e29f 64 */
emilmont 0:8024c367e29f 65 void call();
emilmont 0:8024c367e29f 66
emilmont 0:8024c367e29f 67 private:
emilmont 0:8024c367e29f 68
emilmont 0:8024c367e29f 69 template<typename T>
emilmont 0:8024c367e29f 70 static void membercaller(void *object, char *member) {
emilmont 0:8024c367e29f 71 T* o = static_cast<T*>(object);
emilmont 0:8024c367e29f 72 void (T::*m)(void);
emilmont 0:8024c367e29f 73 memcpy((char*)&m, member, sizeof(m));
emilmont 0:8024c367e29f 74 (o->*m)();
emilmont 0:8024c367e29f 75 }
emilmont 0:8024c367e29f 76
emilmont 0:8024c367e29f 77 void (*_function)(void); // static function pointer - 0 if none attached
emilmont 0:8024c367e29f 78 void *_object; // object this pointer - 0 if none attached
emilmont 0:8024c367e29f 79 char _member[16]; // raw member function pointer storage - converted back by registered _membercaller
emilmont 0:8024c367e29f 80 void (*_membercaller)(void*, char*); // registered membercaller function to convert back and call _member on _object
emilmont 0:8024c367e29f 81
emilmont 0:8024c367e29f 82 };
emilmont 0:8024c367e29f 83
emilmont 0:8024c367e29f 84 } // namespace mbed
emilmont 0:8024c367e29f 85
emilmont 0:8024c367e29f 86 #endif