Luth Haroon / SD_modified

SD card interface

mbed-export/FunctionPointer.h@0:22612ae617a0, 2012-10-08 (annotated)

Committer:
lharoon
Date:
Mon Oct 08 11:14:07 2012 +0000
Revision:
0:22612ae617a0
1st edition

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lharoon 0:22612ae617a0 1 /* mbed Microcontroller Library - FunctionPointer
lharoon 0:22612ae617a0 2 * Copyright (c) 2007-2009 ARM Limited. All rights reserved.
lharoon 0:22612ae617a0 3 */
lharoon 0:22612ae617a0 4
lharoon 0:22612ae617a0 5 #ifndef MBED_FUNCTIONPOINTER_H
lharoon 0:22612ae617a0 6 #define MBED_FUNCTIONPOINTER_H
lharoon 0:22612ae617a0 7
lharoon 0:22612ae617a0 8 #include <string.h>
lharoon 0:22612ae617a0 9
lharoon 0:22612ae617a0 10 namespace mbed {
lharoon 0:22612ae617a0 11
lharoon 0:22612ae617a0 12 /* Class FunctionPointer
lharoon 0:22612ae617a0 13 * A class for storing and calling a pointer to a static or member void function
lharoon 0:22612ae617a0 14 */
lharoon 0:22612ae617a0 15 class FunctionPointer {
lharoon 0:22612ae617a0 16
lharoon 0:22612ae617a0 17 public:
lharoon 0:22612ae617a0 18
lharoon 0:22612ae617a0 19 /* Constructor FunctionPointer
lharoon 0:22612ae617a0 20 * Create a FunctionPointer, attaching a static function
lharoon 0:22612ae617a0 21 *
lharoon 0:22612ae617a0 22 * Variables
lharoon 0:22612ae617a0 23 * function - The void static function to attach (default is none)
lharoon 0:22612ae617a0 24 */
lharoon 0:22612ae617a0 25 FunctionPointer(void (*function)(void) = 0);
lharoon 0:22612ae617a0 26
lharoon 0:22612ae617a0 27 /* Constructor FunctionPointer
lharoon 0:22612ae617a0 28 * Create a FunctionPointer, attaching a member function
lharoon 0:22612ae617a0 29 *
lharoon 0:22612ae617a0 30 * Variables
lharoon 0:22612ae617a0 31 * object - The object pointer to invoke the member function on (i.e. the this pointer)
lharoon 0:22612ae617a0 32 * function - The address of the void member function to attach
lharoon 0:22612ae617a0 33 */
lharoon 0:22612ae617a0 34 template<typename T>
lharoon 0:22612ae617a0 35 FunctionPointer(T *object, void (T::*member)(void)) {
lharoon 0:22612ae617a0 36 attach(object, member);
lharoon 0:22612ae617a0 37 }
lharoon 0:22612ae617a0 38
lharoon 0:22612ae617a0 39 /* Function attach
lharoon 0:22612ae617a0 40 * Attach a static function
lharoon 0:22612ae617a0 41 *
lharoon 0:22612ae617a0 42 * Variables
lharoon 0:22612ae617a0 43 * function - The void static function to attach (default is none)
lharoon 0:22612ae617a0 44 */
lharoon 0:22612ae617a0 45 void attach(void (*function)(void) = 0);
lharoon 0:22612ae617a0 46
lharoon 0:22612ae617a0 47 /* Function attach
lharoon 0:22612ae617a0 48 * Attach a member function
lharoon 0:22612ae617a0 49 *
lharoon 0:22612ae617a0 50 * Variables
lharoon 0:22612ae617a0 51 * object - The object pointer to invoke the member function on (i.e. the this pointer)
lharoon 0:22612ae617a0 52 * function - The address of the void member function to attach
lharoon 0:22612ae617a0 53 */
lharoon 0:22612ae617a0 54 template<typename T>
lharoon 0:22612ae617a0 55 void attach(T *object, void (T::*member)(void)) {
lharoon 0:22612ae617a0 56 _object = static_cast<void*>(object);
lharoon 0:22612ae617a0 57 memcpy(_member, (char*)&member, sizeof(member));
lharoon 0:22612ae617a0 58 _membercaller = &FunctionPointer::membercaller<T>;
lharoon 0:22612ae617a0 59 _function = 0;
lharoon 0:22612ae617a0 60 }
lharoon 0:22612ae617a0 61
lharoon 0:22612ae617a0 62 /* Function call
lharoon 0:22612ae617a0 63 * Call the attached static or member function
lharoon 0:22612ae617a0 64 */
lharoon 0:22612ae617a0 65 void call();
lharoon 0:22612ae617a0 66
lharoon 0:22612ae617a0 67 private:
lharoon 0:22612ae617a0 68
lharoon 0:22612ae617a0 69 template<typename T>
lharoon 0:22612ae617a0 70 static void membercaller(void *object, char *member) {
lharoon 0:22612ae617a0 71 T* o = static_cast<T*>(object);
lharoon 0:22612ae617a0 72 void (T::*m)(void);
lharoon 0:22612ae617a0 73 memcpy((char*)&m, member, sizeof(m));
lharoon 0:22612ae617a0 74 (o->*m)();
lharoon 0:22612ae617a0 75 }
lharoon 0:22612ae617a0 76
lharoon 0:22612ae617a0 77 void (*_function)(void); // static function pointer - 0 if none attached
lharoon 0:22612ae617a0 78 void *_object; // object this pointer - 0 if none attached
lharoon 0:22612ae617a0 79 char _member[16]; // raw member function pointer storage - converted back by registered _membercaller
lharoon 0:22612ae617a0 80 void (*_membercaller)(void*, char*); // registered membercaller function to convert back and call _member on _object
lharoon 0:22612ae617a0 81
lharoon 0:22612ae617a0 82 };
lharoon 0:22612ae617a0 83
lharoon 0:22612ae617a0 84 } // namespace mbed
lharoon 0:22612ae617a0 85
lharoon 0:22612ae617a0 86 #endif