Matthew Sims / mbed

Lab 1 Program C

Dependents:   Lab1C

Fork of mbed by -deleted-

FunctionPointer.h@4:5d1359a283bc, 2008-11-27 (annotated)

Committer:
simon.ford@mbed.co.uk
Date:
Thu Nov 27 16:23:24 2008 +0000
Revision:
4:5d1359a283bc
Parent:
3:aefd12a1f1c5
Child:
9:cf0d45ce28a6
New version of framework: vectors, environment, platform, base and file system

Who changed what in which revision?

UserRevisionLine numberNew contents of line
simon.ford@mbed.co.uk 4:5d1359a283bc 1 /* mbed Microcontroller Library - FunctionPointer
simon.ford@mbed.co.uk 4:5d1359a283bc 2 * Copyright (c) 2007-2008, sford
simon.ford@mbed.co.uk 4:5d1359a283bc 3 */
simon.ford@mbed.co.uk 4:5d1359a283bc 4
simon.ford@mbed.co.uk 4:5d1359a283bc 5 #ifndef MBED_FUNCTIONPOINTER_H
simon.ford@mbed.co.uk 4:5d1359a283bc 6 #define MBED_FUNCTIONPOINTER_H
simon.ford@mbed.co.uk 4:5d1359a283bc 7
simon.ford@mbed.co.uk 4:5d1359a283bc 8 #include "string.h"
simon.ford@mbed.co.uk 4:5d1359a283bc 9
simon.ford@mbed.co.uk 4:5d1359a283bc 10 namespace mbed {
simon.ford@mbed.co.uk 4:5d1359a283bc 11
simon.ford@mbed.co.uk 4:5d1359a283bc 12 /* Class FunctionPointer
simon.ford@mbed.co.uk 4:5d1359a283bc 13 * A class for storing and calling a pointer to a static or member void function
simon.ford@mbed.co.uk 4:5d1359a283bc 14 */
simon.ford@mbed.co.uk 4:5d1359a283bc 15 class FunctionPointer {
simon.ford@mbed.co.uk 4:5d1359a283bc 16
simon.ford@mbed.co.uk 4:5d1359a283bc 17 public:
simon.ford@mbed.co.uk 4:5d1359a283bc 18
simon.ford@mbed.co.uk 4:5d1359a283bc 19 /* Constructor FunctionPointer
simon.ford@mbed.co.uk 4:5d1359a283bc 20 * Create a FunctionPointer, attaching a static function
simon.ford@mbed.co.uk 4:5d1359a283bc 21 *
simon.ford@mbed.co.uk 4:5d1359a283bc 22 * Variables
simon.ford@mbed.co.uk 4:5d1359a283bc 23 * function - The void static function to attach (default is none)
simon.ford@mbed.co.uk 4:5d1359a283bc 24 */
simon.ford@mbed.co.uk 4:5d1359a283bc 25 FunctionPointer(void (*function)(void) = 0);
simon.ford@mbed.co.uk 4:5d1359a283bc 26
simon.ford@mbed.co.uk 4:5d1359a283bc 27 /* Constructor FunctionPointer
simon.ford@mbed.co.uk 4:5d1359a283bc 28 * Create a FunctionPointer, attaching a member function
simon.ford@mbed.co.uk 4:5d1359a283bc 29 *
simon.ford@mbed.co.uk 4:5d1359a283bc 30 * Variables
simon.ford@mbed.co.uk 4:5d1359a283bc 31 * object - The object pointer to invoke the member function on (i.e. the this pointer)
simon.ford@mbed.co.uk 4:5d1359a283bc 32 * function - The address of the void member function to attach
simon.ford@mbed.co.uk 4:5d1359a283bc 33 */
simon.ford@mbed.co.uk 4:5d1359a283bc 34 template<typename T>
simon.ford@mbed.co.uk 4:5d1359a283bc 35 FunctionPointer(T *object, void (T::*member)(void)) {
simon.ford@mbed.co.uk 4:5d1359a283bc 36 attach(object, member);
simon.ford@mbed.co.uk 4:5d1359a283bc 37 }
simon.ford@mbed.co.uk 4:5d1359a283bc 38
simon.ford@mbed.co.uk 4:5d1359a283bc 39 /* Function attach
simon.ford@mbed.co.uk 4:5d1359a283bc 40 * Attach a static function
simon.ford@mbed.co.uk 4:5d1359a283bc 41 *
simon.ford@mbed.co.uk 4:5d1359a283bc 42 * Variables
simon.ford@mbed.co.uk 4:5d1359a283bc 43 * function - The void static function to attach (default is none)
simon.ford@mbed.co.uk 4:5d1359a283bc 44 */
simon.ford@mbed.co.uk 4:5d1359a283bc 45 void attach(void (*function)(void) = 0);
simon.ford@mbed.co.uk 4:5d1359a283bc 46
simon.ford@mbed.co.uk 4:5d1359a283bc 47 /* Function attach
simon.ford@mbed.co.uk 4:5d1359a283bc 48 * Attach a member function
simon.ford@mbed.co.uk 4:5d1359a283bc 49 *
simon.ford@mbed.co.uk 4:5d1359a283bc 50 * Variables
simon.ford@mbed.co.uk 4:5d1359a283bc 51 * object - The object pointer to invoke the member function on (i.e. the this pointer)
simon.ford@mbed.co.uk 4:5d1359a283bc 52 * function - The address of the void member function to attach
simon.ford@mbed.co.uk 4:5d1359a283bc 53 */
simon.ford@mbed.co.uk 4:5d1359a283bc 54 template<typename T>
simon.ford@mbed.co.uk 4:5d1359a283bc 55 void attach(T *object, void (T::*member)(void)) {
simon.ford@mbed.co.uk 4:5d1359a283bc 56 _object = static_cast<void*>(object);
simon.ford@mbed.co.uk 4:5d1359a283bc 57 memcpy(_member, (char*)&member, sizeof(member));
simon.ford@mbed.co.uk 4:5d1359a283bc 58 _membercaller = &FunctionPointer::membercaller<T>;
simon.ford@mbed.co.uk 4:5d1359a283bc 59 _function = 0;
simon.ford@mbed.co.uk 4:5d1359a283bc 60 }
simon.ford@mbed.co.uk 4:5d1359a283bc 61
simon.ford@mbed.co.uk 4:5d1359a283bc 62 /* Function call
simon.ford@mbed.co.uk 4:5d1359a283bc 63 * Call the attached static or member function
simon.ford@mbed.co.uk 4:5d1359a283bc 64 */
simon.ford@mbed.co.uk 4:5d1359a283bc 65 void call();
simon.ford@mbed.co.uk 4:5d1359a283bc 66
simon.ford@mbed.co.uk 4:5d1359a283bc 67 private:
simon.ford@mbed.co.uk 4:5d1359a283bc 68
simon.ford@mbed.co.uk 4:5d1359a283bc 69 template<typename T>
simon.ford@mbed.co.uk 4:5d1359a283bc 70 static void membercaller(void *object, char *member) {
simon.ford@mbed.co.uk 4:5d1359a283bc 71 T* o = static_cast<T*>(object);
simon.ford@mbed.co.uk 4:5d1359a283bc 72 void (T::*m)(void);
simon.ford@mbed.co.uk 4:5d1359a283bc 73 memcpy((char*)&m, member, sizeof(m));
simon.ford@mbed.co.uk 4:5d1359a283bc 74 (o->*m)();
simon.ford@mbed.co.uk 4:5d1359a283bc 75 }
simon.ford@mbed.co.uk 4:5d1359a283bc 76
simon.ford@mbed.co.uk 4:5d1359a283bc 77 void (*_function)(void); // static function pointer - 0 if none attached
simon.ford@mbed.co.uk 4:5d1359a283bc 78 void *_object; // object this pointer - 0 if none attached
simon.ford@mbed.co.uk 4:5d1359a283bc 79 char _member[16]; // raw member function pointer storage - converted back by registered _membercaller
simon.ford@mbed.co.uk 4:5d1359a283bc 80 void (*_membercaller)(void*, char*); // registered membercaller function to convert back and call _member on _object
simon.ford@mbed.co.uk 4:5d1359a283bc 81
simon.ford@mbed.co.uk 4:5d1359a283bc 82 };
simon.ford@mbed.co.uk 4:5d1359a283bc 83
simon.ford@mbed.co.uk 4:5d1359a283bc 84 }
simon.ford@mbed.co.uk 4:5d1359a283bc 85
simon.ford@mbed.co.uk 4:5d1359a283bc 86 #endif