Ermanno Brusadin / mbed

mbed library sources

Dependents:   FRDM-KL46Z_LCD_Test FRDM-KL46Z_LCD_Test FRDM-KL46Z_Plantilla FRDM-KL46Z_Plantilla ... more

api/FunctionPointer.h@0:6bc4ac881c8e, 2016-07-28 (annotated)

Committer:
ebrus
Date:
Thu Jul 28 15:56:34 2016 +0000
Revision:
0:6bc4ac881c8e
1;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ebrus 0:6bc4ac881c8e 1 /* mbed Microcontroller Library
ebrus 0:6bc4ac881c8e 2 * Copyright (c) 2006-2013 ARM Limited
ebrus 0:6bc4ac881c8e 3 *
ebrus 0:6bc4ac881c8e 4 * Licensed under the Apache License, Version 2.0 (the "License");
ebrus 0:6bc4ac881c8e 5 * you may not use this file except in compliance with the License.
ebrus 0:6bc4ac881c8e 6 * You may obtain a copy of the License at
ebrus 0:6bc4ac881c8e 7 *
ebrus 0:6bc4ac881c8e 8 * http://www.apache.org/licenses/LICENSE-2.0
ebrus 0:6bc4ac881c8e 9 *
ebrus 0:6bc4ac881c8e 10 * Unless required by applicable law or agreed to in writing, software
ebrus 0:6bc4ac881c8e 11 * distributed under the License is distributed on an "AS IS" BASIS,
ebrus 0:6bc4ac881c8e 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ebrus 0:6bc4ac881c8e 13 * See the License for the specific language governing permissions and
ebrus 0:6bc4ac881c8e 14 * limitations under the License.
ebrus 0:6bc4ac881c8e 15 */
ebrus 0:6bc4ac881c8e 16 #ifndef MBED_FUNCTIONPOINTER_H
ebrus 0:6bc4ac881c8e 17 #define MBED_FUNCTIONPOINTER_H
ebrus 0:6bc4ac881c8e 18
ebrus 0:6bc4ac881c8e 19 #include <string.h>
ebrus 0:6bc4ac881c8e 20
ebrus 0:6bc4ac881c8e 21 namespace mbed {
ebrus 0:6bc4ac881c8e 22
ebrus 0:6bc4ac881c8e 23 typedef void (*pvoidf_t)(void);
ebrus 0:6bc4ac881c8e 24
ebrus 0:6bc4ac881c8e 25 /** A class for storing and calling a pointer to a static or member void function
ebrus 0:6bc4ac881c8e 26 */
ebrus 0:6bc4ac881c8e 27 class FunctionPointer {
ebrus 0:6bc4ac881c8e 28 public:
ebrus 0:6bc4ac881c8e 29
ebrus 0:6bc4ac881c8e 30 /** Create a FunctionPointer, attaching a static function
ebrus 0:6bc4ac881c8e 31 *
ebrus 0:6bc4ac881c8e 32 * @param function The void static function to attach (default is none)
ebrus 0:6bc4ac881c8e 33 */
ebrus 0:6bc4ac881c8e 34 FunctionPointer(void (*function)(void) = 0);
ebrus 0:6bc4ac881c8e 35
ebrus 0:6bc4ac881c8e 36 /** Create a FunctionPointer, attaching a member function
ebrus 0:6bc4ac881c8e 37 *
ebrus 0:6bc4ac881c8e 38 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
ebrus 0:6bc4ac881c8e 39 * @param function The address of the void member function to attach
ebrus 0:6bc4ac881c8e 40 */
ebrus 0:6bc4ac881c8e 41 template<typename T>
ebrus 0:6bc4ac881c8e 42 FunctionPointer(T *object, void (T::*member)(void)) {
ebrus 0:6bc4ac881c8e 43 attach(object, member);
ebrus 0:6bc4ac881c8e 44 }
ebrus 0:6bc4ac881c8e 45
ebrus 0:6bc4ac881c8e 46 /** Attach a static function
ebrus 0:6bc4ac881c8e 47 *
ebrus 0:6bc4ac881c8e 48 * @param function The void static function to attach (default is none)
ebrus 0:6bc4ac881c8e 49 */
ebrus 0:6bc4ac881c8e 50 void attach(void (*function)(void) = 0);
ebrus 0:6bc4ac881c8e 51
ebrus 0:6bc4ac881c8e 52 /** Attach a member function
ebrus 0:6bc4ac881c8e 53 *
ebrus 0:6bc4ac881c8e 54 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
ebrus 0:6bc4ac881c8e 55 * @param function The address of the void member function to attach
ebrus 0:6bc4ac881c8e 56 */
ebrus 0:6bc4ac881c8e 57 template<typename T>
ebrus 0:6bc4ac881c8e 58 void attach(T *object, void (T::*member)(void)) {
ebrus 0:6bc4ac881c8e 59 _object = static_cast<void*>(object);
ebrus 0:6bc4ac881c8e 60 memcpy(_member, (char*)&member, sizeof(member));
ebrus 0:6bc4ac881c8e 61 _membercaller = &FunctionPointer::membercaller<T>;
ebrus 0:6bc4ac881c8e 62 _function = 0;
ebrus 0:6bc4ac881c8e 63 }
ebrus 0:6bc4ac881c8e 64
ebrus 0:6bc4ac881c8e 65 /** Call the attached static or member function
ebrus 0:6bc4ac881c8e 66 */
ebrus 0:6bc4ac881c8e 67 void call();
ebrus 0:6bc4ac881c8e 68
ebrus 0:6bc4ac881c8e 69 pvoidf_t get_function() const {
ebrus 0:6bc4ac881c8e 70 return (pvoidf_t)_function;
ebrus 0:6bc4ac881c8e 71 }
ebrus 0:6bc4ac881c8e 72
ebrus 0:6bc4ac881c8e 73 #ifdef MBED_OPERATORS
ebrus 0:6bc4ac881c8e 74 void operator ()(void);
ebrus 0:6bc4ac881c8e 75 #endif
ebrus 0:6bc4ac881c8e 76
ebrus 0:6bc4ac881c8e 77 private:
ebrus 0:6bc4ac881c8e 78 template<typename T>
ebrus 0:6bc4ac881c8e 79 static void membercaller(void *object, char *member) {
ebrus 0:6bc4ac881c8e 80 T* o = static_cast<T*>(object);
ebrus 0:6bc4ac881c8e 81 void (T::*m)(void);
ebrus 0:6bc4ac881c8e 82 memcpy((char*)&m, member, sizeof(m));
ebrus 0:6bc4ac881c8e 83 (o->*m)();
ebrus 0:6bc4ac881c8e 84 }
ebrus 0:6bc4ac881c8e 85
ebrus 0:6bc4ac881c8e 86 void (*_function)(void); // static function pointer - 0 if none attached
ebrus 0:6bc4ac881c8e 87 void *_object; // object this pointer - 0 if none attached
ebrus 0:6bc4ac881c8e 88 char _member[16]; // raw member function pointer storage - converted back by registered _membercaller
ebrus 0:6bc4ac881c8e 89 void (*_membercaller)(void*, char*); // registered membercaller function to convert back and call _member on _object
ebrus 0:6bc4ac881c8e 90 };
ebrus 0:6bc4ac881c8e 91
ebrus 0:6bc4ac881c8e 92 } // namespace mbed
ebrus 0:6bc4ac881c8e 93
ebrus 0:6bc4ac881c8e 94 #endif