Jonathan Piat / mbed-src

mbed library sources

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api/FunctionPointer.h@10:3bc89ef62ce7, 2013-06-14 (annotated)

Committer:
emilmont
Date:
Fri Jun 14 17:49:17 2013 +0100
Revision:
10:3bc89ef62ce7
Parent:
9:0ce32e54c9a7
Child:
13:0645d8841f51
Unify mbed library sources

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 10:3bc89ef62ce7 1 /* mbed Microcontroller Library
emilmont 10:3bc89ef62ce7 2 * Copyright (c) 2006-2013 ARM Limited
emilmont 10:3bc89ef62ce7 3 *
emilmont 10:3bc89ef62ce7 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 10:3bc89ef62ce7 5 * you may not use this file except in compliance with the License.
emilmont 10:3bc89ef62ce7 6 * You may obtain a copy of the License at
emilmont 10:3bc89ef62ce7 7 *
emilmont 10:3bc89ef62ce7 8 * http://www.apache.org/licenses/LICENSE-2.0
emilmont 10:3bc89ef62ce7 9 *
emilmont 10:3bc89ef62ce7 10 * Unless required by applicable law or agreed to in writing, software
emilmont 10:3bc89ef62ce7 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 10:3bc89ef62ce7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 10:3bc89ef62ce7 13 * See the License for the specific language governing permissions and
emilmont 10:3bc89ef62ce7 14 * limitations under the License.
emilmont 10:3bc89ef62ce7 15 */
emilmont 10:3bc89ef62ce7 16 #ifndef MBED_FUNCTIONPOINTER_H
emilmont 10:3bc89ef62ce7 17 #define MBED_FUNCTIONPOINTER_H
emilmont 10:3bc89ef62ce7 18
emilmont 10:3bc89ef62ce7 19 #include <string.h>
emilmont 10:3bc89ef62ce7 20
emilmont 10:3bc89ef62ce7 21 namespace mbed {
emilmont 10:3bc89ef62ce7 22
emilmont 10:3bc89ef62ce7 23 /** A class for storing and calling a pointer to a static or member void function
emilmont 10:3bc89ef62ce7 24 */
emilmont 10:3bc89ef62ce7 25 class FunctionPointer {
emilmont 10:3bc89ef62ce7 26 public:
emilmont 10:3bc89ef62ce7 27
emilmont 10:3bc89ef62ce7 28 /** Create a FunctionPointer, attaching a static function
emilmont 10:3bc89ef62ce7 29 *
emilmont 10:3bc89ef62ce7 30 * @param function The void static function to attach (default is none)
emilmont 10:3bc89ef62ce7 31 */
emilmont 10:3bc89ef62ce7 32 FunctionPointer(void (*function)(void) = 0);
emilmont 10:3bc89ef62ce7 33
emilmont 10:3bc89ef62ce7 34 /** Create a FunctionPointer, attaching a member function
emilmont 10:3bc89ef62ce7 35 *
emilmont 10:3bc89ef62ce7 36 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
emilmont 10:3bc89ef62ce7 37 * @param function The address of the void member function to attach
emilmont 10:3bc89ef62ce7 38 */
emilmont 10:3bc89ef62ce7 39 template<typename T>
emilmont 10:3bc89ef62ce7 40 FunctionPointer(T *object, void (T::*member)(void)) {
emilmont 10:3bc89ef62ce7 41 attach(object, member);
emilmont 10:3bc89ef62ce7 42 }
emilmont 10:3bc89ef62ce7 43
emilmont 10:3bc89ef62ce7 44 /** Attach a static function
emilmont 10:3bc89ef62ce7 45 *
emilmont 10:3bc89ef62ce7 46 * @param function The void static function to attach (default is none)
emilmont 10:3bc89ef62ce7 47 */
emilmont 10:3bc89ef62ce7 48 void attach(void (*function)(void) = 0);
emilmont 10:3bc89ef62ce7 49
emilmont 10:3bc89ef62ce7 50 /** Attach a member function
emilmont 10:3bc89ef62ce7 51 *
emilmont 10:3bc89ef62ce7 52 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
emilmont 10:3bc89ef62ce7 53 * @param function The address of the void member function to attach
emilmont 10:3bc89ef62ce7 54 */
emilmont 10:3bc89ef62ce7 55 template<typename T>
emilmont 10:3bc89ef62ce7 56 void attach(T *object, void (T::*member)(void)) {
emilmont 10:3bc89ef62ce7 57 _object = static_cast<void*>(object);
emilmont 10:3bc89ef62ce7 58 memcpy(_member, (char*)&member, sizeof(member));
emilmont 10:3bc89ef62ce7 59 _membercaller = &FunctionPointer::membercaller<T>;
emilmont 10:3bc89ef62ce7 60 _function = 0;
emilmont 10:3bc89ef62ce7 61 }
emilmont 10:3bc89ef62ce7 62
emilmont 10:3bc89ef62ce7 63 /** Call the attached static or member function
emilmont 10:3bc89ef62ce7 64 */
emilmont 10:3bc89ef62ce7 65 void call();
emilmont 10:3bc89ef62ce7 66
emilmont 10:3bc89ef62ce7 67 private:
emilmont 10:3bc89ef62ce7 68 template<typename T>
emilmont 10:3bc89ef62ce7 69 static void membercaller(void *object, char *member) {
emilmont 10:3bc89ef62ce7 70 T* o = static_cast<T*>(object);
emilmont 10:3bc89ef62ce7 71 void (T::*m)(void);
emilmont 10:3bc89ef62ce7 72 memcpy((char*)&m, member, sizeof(m));
emilmont 10:3bc89ef62ce7 73 (o->*m)();
emilmont 10:3bc89ef62ce7 74 }
emilmont 10:3bc89ef62ce7 75
emilmont 10:3bc89ef62ce7 76 void (*_function)(void); // static function pointer - 0 if none attached
emilmont 10:3bc89ef62ce7 77 void *_object; // object this pointer - 0 if none attached
emilmont 10:3bc89ef62ce7 78 char _member[16]; // raw member function pointer storage - converted back by registered _membercaller
emilmont 10:3bc89ef62ce7 79 void (*_membercaller)(void*, char*); // registered membercaller function to convert back and call _member on _object
emilmont 10:3bc89ef62ce7 80 };
emilmont 10:3bc89ef62ce7 81
emilmont 10:3bc89ef62ce7 82 } // namespace mbed
emilmont 10:3bc89ef62ce7 83
emilmont 10:3bc89ef62ce7 84 #endif