Matthew Sims / mbed

Lab 1 Program C

Dependents:   Lab1C

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FunctionPointer.h@44:1c5f591fce58, 2015-09-29 (annotated)

Committer:
mattsims12
Date:
Tue Sep 29 03:04:58 2015 +0000
Revision:
44:1c5f591fce58
Parent:
43:aff670d0d510 
Lab 1 Program C

Who changed what in which revision?

UserRevisionLine numberNew contents of line
simon.ford@mbed.co.uk 9:cf0d45ce28a6 1 /* mbed Microcontroller Library - FunctionPointer
rolf.meyer@arm.com 11:1c1ebd0324fa 2 * Copyright (c) 2007-2009 ARM Limited. All rights reserved.
rolf.meyer@arm.com 11:1c1ebd0324fa 3 */
rolf.meyer@arm.com 11:1c1ebd0324fa 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 18:b3c9f16cbb96 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
screamer 43:aff670d0d510 12 /** A class for storing and calling a pointer to a static or member void function
simon.ford@mbed.co.uk 9:cf0d45ce28a6 13 */
simon.ford@mbed.co.uk 9:cf0d45ce28a6 14 class FunctionPointer {
simon.ford@mbed.co.uk 9:cf0d45ce28a6 15
simon.ford@mbed.co.uk 9:cf0d45ce28a6 16 public:
simon.ford@mbed.co.uk 9:cf0d45ce28a6 17
screamer 43:aff670d0d510 18 /** Create a FunctionPointer, attaching a static function
screamer 43:aff670d0d510 19 *
screamer 43:aff670d0d510 20 * @param function The void static function to attach (default is none)
screamer 43:aff670d0d510 21 */
screamer 43:aff670d0d510 22 FunctionPointer(void (*function)(void) = 0);
simon.ford@mbed.co.uk 9:cf0d45ce28a6 23
screamer 43:aff670d0d510 24 /** Create a FunctionPointer, attaching a member function
screamer 43:aff670d0d510 25 *
screamer 43:aff670d0d510 26 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
screamer 43:aff670d0d510 27 * @param function The address of the void member function to attach
screamer 43:aff670d0d510 28 */
screamer 43:aff670d0d510 29 template<typename T>
screamer 43:aff670d0d510 30 FunctionPointer(T *object, void (T::*member)(void)) {
screamer 43:aff670d0d510 31 attach(object, member);
screamer 43:aff670d0d510 32 }
simon.ford@mbed.co.uk 9:cf0d45ce28a6 33
screamer 43:aff670d0d510 34 /** Attach a static function
screamer 43:aff670d0d510 35 *
screamer 43:aff670d0d510 36 * @param function The void static function to attach (default is none)
screamer 43:aff670d0d510 37 */
screamer 43:aff670d0d510 38 void attach(void (*function)(void) = 0);
screamer 43:aff670d0d510 39
screamer 43:aff670d0d510 40 /** Attach a member function
screamer 43:aff670d0d510 41 *
screamer 43:aff670d0d510 42 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
screamer 43:aff670d0d510 43 * @param function The address of the void member function to attach
screamer 43:aff670d0d510 44 */
screamer 43:aff670d0d510 45 template<typename T>
screamer 43:aff670d0d510 46 void attach(T *object, void (T::*member)(void)) {
screamer 43:aff670d0d510 47 _object = static_cast<void*>(object);
simon.ford@mbed.co.uk 9:cf0d45ce28a6 48 memcpy(_member, (char*)&member, sizeof(member));
screamer 43:aff670d0d510 49 _membercaller = &FunctionPointer::membercaller<T>;
screamer 43:aff670d0d510 50 _function = 0;
screamer 43:aff670d0d510 51 }
simon.ford@mbed.co.uk 9:cf0d45ce28a6 52
screamer 43:aff670d0d510 53 /** Call the attached static or member function
screamer 43:aff670d0d510 54 */
screamer 43:aff670d0d510 55 void call();
screamer 43:aff670d0d510 56
simon.ford@mbed.co.uk 9:cf0d45ce28a6 57 private:
simon.ford@mbed.co.uk 9:cf0d45ce28a6 58
screamer 43:aff670d0d510 59 template<typename T>
screamer 43:aff670d0d510 60 static void membercaller(void *object, char *member) {
screamer 43:aff670d0d510 61 T* o = static_cast<T*>(object);
screamer 43:aff670d0d510 62 void (T::*m)(void);
simon.ford@mbed.co.uk 9:cf0d45ce28a6 63 memcpy((char*)&m, member, sizeof(m));
screamer 43:aff670d0d510 64 (o->*m)();
screamer 43:aff670d0d510 65 }
screamer 43:aff670d0d510 66
screamer 43:aff670d0d510 67 /** Static function pointer - 0 if none attached
screamer 43:aff670d0d510 68 */
screamer 43:aff670d0d510 69 void (*_function)(void);
screamer 43:aff670d0d510 70
screamer 43:aff670d0d510 71 /** Object this pointer - 0 if none attached
screamer 43:aff670d0d510 72 */
screamer 43:aff670d0d510 73 void *_object;
screamer 43:aff670d0d510 74
screamer 43:aff670d0d510 75 /** Raw member function pointer storage - converted back by registered _membercaller
screamer 43:aff670d0d510 76 */
screamer 43:aff670d0d510 77 char _member[16];
screamer 43:aff670d0d510 78
screamer 43:aff670d0d510 79 /** Registered membercaller function to convert back and call _member on _object
screamer 43:aff670d0d510 80 */
screamer 43:aff670d0d510 81 void (*_membercaller)(void*, char*);
screamer 43:aff670d0d510 82
simon.ford@mbed.co.uk 9:cf0d45ce28a6 83 };
simon.ford@mbed.co.uk 9:cf0d45ce28a6 84
rolf.meyer@arm.com 11:1c1ebd0324fa 85 } // namespace mbed
simon.ford@mbed.co.uk 9:cf0d45ce28a6 86
simon.ford@mbed.co.uk 9:cf0d45ce28a6 87 #endif