fix for mbed lib issue 3 (i2c problem) see also https://mbed.org/users/mbed_official/code/mbed/issues/3 affected implementations: LPC812, LPC11U24, LPC1768, LPC2368, LPC4088
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FunctionPointer.h
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2006-2013 ARM Limited 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 #ifndef MBED_FUNCTIONPOINTER_H 00017 #define MBED_FUNCTIONPOINTER_H 00018 00019 #include <string.h> 00020 00021 namespace mbed { 00022 00023 /** A class for storing and calling a pointer to a static or member void function 00024 */ 00025 class FunctionPointer { 00026 public: 00027 00028 /** Create a FunctionPointer, attaching a static function 00029 * 00030 * @param function The void static function to attach (default is none) 00031 */ 00032 FunctionPointer(void (*function)(void) = 0); 00033 00034 /** Create a FunctionPointer, attaching a member function 00035 * 00036 * @param object The object pointer to invoke the member function on (i.e. the this pointer) 00037 * @param function The address of the void member function to attach 00038 */ 00039 template<typename T> 00040 FunctionPointer(T *object, void (T::*member)(void)) { 00041 attach(object, member); 00042 } 00043 00044 /** Attach a static function 00045 * 00046 * @param function The void static function to attach (default is none) 00047 */ 00048 void attach(void (*function)(void) = 0); 00049 00050 /** Attach a member function 00051 * 00052 * @param object The object pointer to invoke the member function on (i.e. the this pointer) 00053 * @param function The address of the void member function to attach 00054 */ 00055 template<typename T> 00056 void attach(T *object, void (T::*member)(void)) { 00057 _object = static_cast<void*>(object); 00058 memcpy(_member, (char*)&member, sizeof(member)); 00059 _membercaller = &FunctionPointer::membercaller<T>; 00060 _function = 0; 00061 } 00062 00063 /** Call the attached static or member function 00064 */ 00065 void call(); 00066 00067 private: 00068 template<typename T> 00069 static void membercaller(void *object, char *member) { 00070 T* o = static_cast<T*>(object); 00071 void (T::*m)(void); 00072 memcpy((char*)&m, member, sizeof(m)); 00073 (o->*m)(); 00074 } 00075 00076 void (*_function)(void); // static function pointer - 0 if none attached 00077 void *_object; // object this pointer - 0 if none attached 00078 char _member[16]; // raw member function pointer storage - converted back by registered _membercaller 00079 void (*_membercaller)(void*, char*); // registered membercaller function to convert back and call _member on _object 00080 }; 00081 00082 } // namespace mbed 00083 00084 #endif
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