Matthew Sims / mbed

Lab 1 Program C

Dependents:   Lab1C

Fork of mbed by -deleted-

FunctionPointer.h@9:cf0d45ce28a6, 2009-04-15 (annotated)

Committer:
simon.ford@mbed.co.uk
Date:
Wed Apr 15 14:15:04 2009 +0000
Revision:
9:cf0d45ce28a6
Parent:
4:5d1359a283bc
Child:
11:1c1ebd0324fa
Update library with fixes

   * TimerEvent hang bugfix

   * FileLike use as file pointer

Who changed what in which revision?

UserRevisionLine numberNew contents of line
simon.ford@mbed.co.uk 9:cf0d45ce28a6 1 /* mbed Microcontroller Library - FunctionPointer
simon.ford@mbed.co.uk 9:cf0d45ce28a6 2 * Copyright (c) 2007-2008, sford
simon.ford@mbed.co.uk 9:cf0d45ce28a6 3 */
simon.ford@mbed.co.uk 9:cf0d45ce28a6 4
simon.ford@mbed.co.uk 9:cf0d45ce28a6 5 #ifndef MBED_FUNCTIONPOINTER_H
simon.ford@mbed.co.uk 9:cf0d45ce28a6 6 #define MBED_FUNCTIONPOINTER_H
simon.ford@mbed.co.uk 9:cf0d45ce28a6 7
simon.ford@mbed.co.uk 9:cf0d45ce28a6 8 #include "string.h"
simon.ford@mbed.co.uk 9:cf0d45ce28a6 9
simon.ford@mbed.co.uk 9:cf0d45ce28a6 10 namespace mbed {
simon.ford@mbed.co.uk 9:cf0d45ce28a6 11
simon.ford@mbed.co.uk 9:cf0d45ce28a6 12 /* Class FunctionPointer
simon.ford@mbed.co.uk 9:cf0d45ce28a6 13 * A class for storing and calling a pointer to a static or member void function
simon.ford@mbed.co.uk 9:cf0d45ce28a6 14 */
simon.ford@mbed.co.uk 9:cf0d45ce28a6 15 class FunctionPointer {
simon.ford@mbed.co.uk 9:cf0d45ce28a6 16
simon.ford@mbed.co.uk 9:cf0d45ce28a6 17 public:
simon.ford@mbed.co.uk 9:cf0d45ce28a6 18
simon.ford@mbed.co.uk 9:cf0d45ce28a6 19 /* Constructor FunctionPointer
simon.ford@mbed.co.uk 9:cf0d45ce28a6 20 * Create a FunctionPointer, attaching a static function
simon.ford@mbed.co.uk 9:cf0d45ce28a6 21 *
simon.ford@mbed.co.uk 9:cf0d45ce28a6 22 * Variables
simon.ford@mbed.co.uk 9:cf0d45ce28a6 23 * function - The void static function to attach (default is none)
simon.ford@mbed.co.uk 9:cf0d45ce28a6 24 */
simon.ford@mbed.co.uk 9:cf0d45ce28a6 25 FunctionPointer(void (*function)(void) = 0);
simon.ford@mbed.co.uk 9:cf0d45ce28a6 26
simon.ford@mbed.co.uk 9:cf0d45ce28a6 27 /* Constructor FunctionPointer
simon.ford@mbed.co.uk 9:cf0d45ce28a6 28 * Create a FunctionPointer, attaching a member function
simon.ford@mbed.co.uk 9:cf0d45ce28a6 29 *
simon.ford@mbed.co.uk 9:cf0d45ce28a6 30 * Variables
simon.ford@mbed.co.uk 9:cf0d45ce28a6 31 * object - The object pointer to invoke the member function on (i.e. the this pointer)
simon.ford@mbed.co.uk 9:cf0d45ce28a6 32 * function - The address of the void member function to attach
simon.ford@mbed.co.uk 9:cf0d45ce28a6 33 */
simon.ford@mbed.co.uk 9:cf0d45ce28a6 34 template<typename T>
simon.ford@mbed.co.uk 9:cf0d45ce28a6 35 FunctionPointer(T *object, void (T::*member)(void)) {
simon.ford@mbed.co.uk 9:cf0d45ce28a6 36 attach(object, member);
simon.ford@mbed.co.uk 9:cf0d45ce28a6 37 }
simon.ford@mbed.co.uk 9:cf0d45ce28a6 38
simon.ford@mbed.co.uk 9:cf0d45ce28a6 39 /* Function attach
simon.ford@mbed.co.uk 9:cf0d45ce28a6 40 * Attach a static function
simon.ford@mbed.co.uk 9:cf0d45ce28a6 41 *
simon.ford@mbed.co.uk 9:cf0d45ce28a6 42 * Variables
simon.ford@mbed.co.uk 9:cf0d45ce28a6 43 * function - The void static function to attach (default is none)
simon.ford@mbed.co.uk 9:cf0d45ce28a6 44 */
simon.ford@mbed.co.uk 9:cf0d45ce28a6 45 void attach(void (*function)(void) = 0);
simon.ford@mbed.co.uk 9:cf0d45ce28a6 46
simon.ford@mbed.co.uk 9:cf0d45ce28a6 47 /* Function attach
simon.ford@mbed.co.uk 9:cf0d45ce28a6 48 * Attach a member function
simon.ford@mbed.co.uk 9:cf0d45ce28a6 49 *
simon.ford@mbed.co.uk 9:cf0d45ce28a6 50 * Variables
simon.ford@mbed.co.uk 9:cf0d45ce28a6 51 * object - The object pointer to invoke the member function on (i.e. the this pointer)
simon.ford@mbed.co.uk 9:cf0d45ce28a6 52 * function - The address of the void member function to attach
simon.ford@mbed.co.uk 9:cf0d45ce28a6 53 */
simon.ford@mbed.co.uk 9:cf0d45ce28a6 54 template<typename T>
simon.ford@mbed.co.uk 9:cf0d45ce28a6 55 void attach(T *object, void (T::*member)(void)) {
simon.ford@mbed.co.uk 9:cf0d45ce28a6 56 _object = static_cast<void*>(object);
simon.ford@mbed.co.uk 9:cf0d45ce28a6 57 memcpy(_member, (char*)&member, sizeof(member));
simon.ford@mbed.co.uk 9:cf0d45ce28a6 58 _membercaller = &FunctionPointer::membercaller<T>;
simon.ford@mbed.co.uk 9:cf0d45ce28a6 59 _function = 0;
simon.ford@mbed.co.uk 9:cf0d45ce28a6 60 }
simon.ford@mbed.co.uk 9:cf0d45ce28a6 61
simon.ford@mbed.co.uk 9:cf0d45ce28a6 62 /* Function call
simon.ford@mbed.co.uk 9:cf0d45ce28a6 63 * Call the attached static or member function
simon.ford@mbed.co.uk 9:cf0d45ce28a6 64 */
simon.ford@mbed.co.uk 9:cf0d45ce28a6 65 void call();
simon.ford@mbed.co.uk 9:cf0d45ce28a6 66
simon.ford@mbed.co.uk 9:cf0d45ce28a6 67 private:
simon.ford@mbed.co.uk 9:cf0d45ce28a6 68
simon.ford@mbed.co.uk 9:cf0d45ce28a6 69 template<typename T>
simon.ford@mbed.co.uk 9:cf0d45ce28a6 70 static void membercaller(void *object, char *member) {
simon.ford@mbed.co.uk 9:cf0d45ce28a6 71 T* o = static_cast<T*>(object);
simon.ford@mbed.co.uk 9:cf0d45ce28a6 72 void (T::*m)(void);
simon.ford@mbed.co.uk 9:cf0d45ce28a6 73 memcpy((char*)&m, member, sizeof(m));
simon.ford@mbed.co.uk 9:cf0d45ce28a6 74 (o->*m)();
simon.ford@mbed.co.uk 9:cf0d45ce28a6 75 }
simon.ford@mbed.co.uk 9:cf0d45ce28a6 76
simon.ford@mbed.co.uk 9:cf0d45ce28a6 77 void (*_function)(void); // static function pointer - 0 if none attached
simon.ford@mbed.co.uk 9:cf0d45ce28a6 78 void *_object; // object this pointer - 0 if none attached
simon.ford@mbed.co.uk 9:cf0d45ce28a6 79 char _member[16]; // raw member function pointer storage - converted back by registered _membercaller
simon.ford@mbed.co.uk 9:cf0d45ce28a6 80 void (*_membercaller)(void*, char*); // registered membercaller function to convert back and call _member on _object
simon.ford@mbed.co.uk 9:cf0d45ce28a6 81
simon.ford@mbed.co.uk 9:cf0d45ce28a6 82 };
simon.ford@mbed.co.uk 9:cf0d45ce28a6 83
simon.ford@mbed.co.uk 9:cf0d45ce28a6 84 }
simon.ford@mbed.co.uk 9:cf0d45ce28a6 85
simon.ford@mbed.co.uk 9:cf0d45ce28a6 86 #endif