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FunctionPointer.h@43:e2ed12d17f06, 2012-10-26 (annotated)

Committer:
emilmont
Date:
Fri Oct 26 17:40:46 2012 +0100
Revision:
43:e2ed12d17f06
Parent:
27:7110ebee3484
Child:
44:24d45a770a51
Update documentation

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
emilmont 43:e2ed12d17f06 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
emilmont 43:e2ed12d17f06 18 /** Create a FunctionPointer, attaching a static function
emilmont 43:e2ed12d17f06 19 *
emilmont 43:e2ed12d17f06 20 * @param function The void static function to attach (default is none)
emilmont 43:e2ed12d17f06 21 */
emilmont 43:e2ed12d17f06 22 FunctionPointer(void (*function)(void) = 0);
simon.ford@mbed.co.uk 9:cf0d45ce28a6 23
emilmont 43:e2ed12d17f06 24 /** Create a FunctionPointer, attaching a member function
emilmont 43:e2ed12d17f06 25 *
emilmont 43:e2ed12d17f06 26 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
emilmont 43:e2ed12d17f06 27 * @param function The address of the void member function to attach
emilmont 43:e2ed12d17f06 28 */
emilmont 43:e2ed12d17f06 29 template<typename T>
emilmont 43:e2ed12d17f06 30 FunctionPointer(T *object, void (T::*member)(void)) {
emilmont 43:e2ed12d17f06 31 attach(object, member);
emilmont 43:e2ed12d17f06 32 }
simon.ford@mbed.co.uk 9:cf0d45ce28a6 33
emilmont 43:e2ed12d17f06 34 /** Attach a static function
emilmont 43:e2ed12d17f06 35 *
emilmont 43:e2ed12d17f06 36 * @param function The void static function to attach (default is none)
emilmont 43:e2ed12d17f06 37 */
emilmont 43:e2ed12d17f06 38 void attach(void (*function)(void) = 0);
emilmont 43:e2ed12d17f06 39
emilmont 43:e2ed12d17f06 40 /** Attach a member function
emilmont 43:e2ed12d17f06 41 *
emilmont 43:e2ed12d17f06 42 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
emilmont 43:e2ed12d17f06 43 * @param function The address of the void member function to attach
emilmont 43:e2ed12d17f06 44 */
emilmont 43:e2ed12d17f06 45 template<typename T>
emilmont 43:e2ed12d17f06 46 void attach(T *object, void (T::*member)(void)) {
emilmont 43:e2ed12d17f06 47 _object = static_cast<void*>(object);
simon.ford@mbed.co.uk 9:cf0d45ce28a6 48 memcpy(_member, (char*)&member, sizeof(member));
emilmont 43:e2ed12d17f06 49 _membercaller = &FunctionPointer::membercaller<T>;
emilmont 43:e2ed12d17f06 50 _function = 0;
emilmont 43:e2ed12d17f06 51 }
simon.ford@mbed.co.uk 9:cf0d45ce28a6 52
emilmont 43:e2ed12d17f06 53 /** Call the attached static or member function
emilmont 43:e2ed12d17f06 54 */
emilmont 43:e2ed12d17f06 55 void call();
emilmont 43:e2ed12d17f06 56
simon.ford@mbed.co.uk 9:cf0d45ce28a6 57 private:
simon.ford@mbed.co.uk 9:cf0d45ce28a6 58
emilmont 43:e2ed12d17f06 59 template<typename T>
emilmont 43:e2ed12d17f06 60 static void membercaller(void *object, char *member) {
emilmont 43:e2ed12d17f06 61 T* o = static_cast<T*>(object);
emilmont 43:e2ed12d17f06 62 void (T::*m)(void);
simon.ford@mbed.co.uk 9:cf0d45ce28a6 63 memcpy((char*)&m, member, sizeof(m));
emilmont 43:e2ed12d17f06 64 (o->*m)();
emilmont 43:e2ed12d17f06 65 }
emilmont 43:e2ed12d17f06 66
emilmont 43:e2ed12d17f06 67 /** Static function pointer - 0 if none attached
emilmont 43:e2ed12d17f06 68 */
emilmont 43:e2ed12d17f06 69 void (*_function)(void);
emilmont 43:e2ed12d17f06 70
emilmont 43:e2ed12d17f06 71 /** Object this pointer - 0 if none attached
emilmont 43:e2ed12d17f06 72 */
emilmont 43:e2ed12d17f06 73 void *_object;
emilmont 43:e2ed12d17f06 74
emilmont 43:e2ed12d17f06 75 /** Raw member function pointer storage - converted back by registered _membercaller
emilmont 43:e2ed12d17f06 76 */
emilmont 43:e2ed12d17f06 77 char _member[16];
emilmont 43:e2ed12d17f06 78
emilmont 43:e2ed12d17f06 79 /** Registered membercaller function to convert back and call _member on _object
emilmont 43:e2ed12d17f06 80 */
emilmont 43:e2ed12d17f06 81 void (*_membercaller)(void*, char*);
emilmont 43:e2ed12d17f06 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