Bei Chen Liu / mbed-src

mbed library sources

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api/FunctionPointer.h@13:0645d8841f51, 2013-08-05 (annotated)

Committer:
bogdanm
Date:
Mon Aug 05 14:12:34 2013 +0300
Revision:
13:0645d8841f51
Parent:
10:3bc89ef62ce7
Child:
15:4892fe388435
Update mbed sources to revision 64

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library
bogdanm 13:0645d8841f51 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 13:0645d8841f51 3 *
bogdanm 13:0645d8841f51 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 13:0645d8841f51 5 * you may not use this file except in compliance with the License.
bogdanm 13:0645d8841f51 6 * You may obtain a copy of the License at
bogdanm 13:0645d8841f51 7 *
bogdanm 13:0645d8841f51 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 13:0645d8841f51 9 *
bogdanm 13:0645d8841f51 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 13:0645d8841f51 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 13:0645d8841f51 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 13:0645d8841f51 13 * See the License for the specific language governing permissions and
bogdanm 13:0645d8841f51 14 * limitations under the License.
bogdanm 13:0645d8841f51 15 */
bogdanm 13:0645d8841f51 16 #ifndef MBED_FUNCTIONPOINTER_H
bogdanm 13:0645d8841f51 17 #define MBED_FUNCTIONPOINTER_H
bogdanm 13:0645d8841f51 18
bogdanm 13:0645d8841f51 19 #include <string.h>
bogdanm 13:0645d8841f51 20
bogdanm 13:0645d8841f51 21 namespace mbed {
bogdanm 13:0645d8841f51 22
bogdanm 13:0645d8841f51 23 /** A class for storing and calling a pointer to a static or member void function
bogdanm 13:0645d8841f51 24 */
bogdanm 13:0645d8841f51 25 class FunctionPointer {
bogdanm 13:0645d8841f51 26 public:
bogdanm 13:0645d8841f51 27
bogdanm 13:0645d8841f51 28 /** Create a FunctionPointer, attaching a static function
bogdanm 13:0645d8841f51 29 *
bogdanm 13:0645d8841f51 30 * @param function The void static function to attach (default is none)
bogdanm 13:0645d8841f51 31 */
bogdanm 13:0645d8841f51 32 FunctionPointer(void (*function)(void) = 0);
bogdanm 13:0645d8841f51 33
bogdanm 13:0645d8841f51 34 /** Create a FunctionPointer, attaching a member function
bogdanm 13:0645d8841f51 35 *
bogdanm 13:0645d8841f51 36 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
bogdanm 13:0645d8841f51 37 * @param function The address of the void member function to attach
bogdanm 13:0645d8841f51 38 */
bogdanm 13:0645d8841f51 39 template<typename T>
bogdanm 13:0645d8841f51 40 FunctionPointer(T *object, void (T::*member)(void)) {
bogdanm 13:0645d8841f51 41 attach(object, member);
bogdanm 13:0645d8841f51 42 }
bogdanm 13:0645d8841f51 43
bogdanm 13:0645d8841f51 44 /** Attach a static function
bogdanm 13:0645d8841f51 45 *
bogdanm 13:0645d8841f51 46 * @param function The void static function to attach (default is none)
bogdanm 13:0645d8841f51 47 */
bogdanm 13:0645d8841f51 48 void attach(void (*function)(void) = 0);
bogdanm 13:0645d8841f51 49
bogdanm 13:0645d8841f51 50 /** Attach a member function
bogdanm 13:0645d8841f51 51 *
bogdanm 13:0645d8841f51 52 * @param object The object pointer to invoke the member function on (i.e. the this pointer)
bogdanm 13:0645d8841f51 53 * @param function The address of the void member function to attach
bogdanm 13:0645d8841f51 54 */
bogdanm 13:0645d8841f51 55 template<typename T>
bogdanm 13:0645d8841f51 56 void attach(T *object, void (T::*member)(void)) {
bogdanm 13:0645d8841f51 57 _object = static_cast<void*>(object);
bogdanm 13:0645d8841f51 58 memcpy(_member, (char*)&member, sizeof(member));
bogdanm 13:0645d8841f51 59 _membercaller = &FunctionPointer::membercaller<T>;
bogdanm 13:0645d8841f51 60 _function = 0;
bogdanm 13:0645d8841f51 61 }
bogdanm 13:0645d8841f51 62
bogdanm 13:0645d8841f51 63 /** Call the attached static or member function
bogdanm 13:0645d8841f51 64 */
bogdanm 13:0645d8841f51 65 void call();
bogdanm 13:0645d8841f51 66
bogdanm 13:0645d8841f51 67 private:
bogdanm 13:0645d8841f51 68 template<typename T>
bogdanm 13:0645d8841f51 69 static void membercaller(void *object, char *member) {
bogdanm 13:0645d8841f51 70 T* o = static_cast<T*>(object);
bogdanm 13:0645d8841f51 71 void (T::*m)(void);
bogdanm 13:0645d8841f51 72 memcpy((char*)&m, member, sizeof(m));
bogdanm 13:0645d8841f51 73 (o->*m)();
bogdanm 13:0645d8841f51 74 }
bogdanm 13:0645d8841f51 75
bogdanm 13:0645d8841f51 76 void (*_function)(void); // static function pointer - 0 if none attached
bogdanm 13:0645d8841f51 77 void *_object; // object this pointer - 0 if none attached
bogdanm 13:0645d8841f51 78 char _member[16]; // raw member function pointer storage - converted back by registered _membercaller
bogdanm 13:0645d8841f51 79 void (*_membercaller)(void*, char*); // registered membercaller function to convert back and call _member on _object
bogdanm 13:0645d8841f51 80 };
bogdanm 13:0645d8841f51 81
bogdanm 13:0645d8841f51 82 } // namespace mbed
bogdanm 13:0645d8841f51 83
bogdanm 13:0645d8841f51 84 #endif