mbed library sources change for ST sensors and ST BLE
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Diff: api/FunctionPointer.h
- Revision:
- 9:0ce32e54c9a7
- Parent:
- 2:143cac498751
- Child:
- 10:3bc89ef62ce7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/api/FunctionPointer.h Mon Jun 10 16:03:00 2013 +0100 @@ -0,0 +1,84 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#ifndef MBED_FUNCTIONPOINTER_H +#define MBED_FUNCTIONPOINTER_H + +#include <string.h> + +namespace mbed { + +/** A class for storing and calling a pointer to a static or member void function + */ +class FunctionPointer { +public: + + /** Create a FunctionPointer, attaching a static function + * + * @param function The void static function to attach (default is none) + */ + FunctionPointer(void (*function)(void) = 0); + + /** Create a FunctionPointer, attaching a member function + * + * @param object The object pointer to invoke the member function on (i.e. the this pointer) + * @param function The address of the void member function to attach + */ + template<typename T> + FunctionPointer(T *object, void (T::*member)(void)) { + attach(object, member); + } + + /** Attach a static function + * + * @param function The void static function to attach (default is none) + */ + void attach(void (*function)(void) = 0); + + /** Attach a member function + * + * @param object The object pointer to invoke the member function on (i.e. the this pointer) + * @param function The address of the void member function to attach + */ + template<typename T> + void attach(T *object, void (T::*member)(void)) { + _object = static_cast<void*>(object); + memcpy(_member, (char*)&member, sizeof(member)); + _membercaller = &FunctionPointer::membercaller<T>; + _function = 0; + } + + /** Call the attached static or member function + */ + void call(); + +private: + template<typename T> + static void membercaller(void *object, char *member) { + T* o = static_cast<T*>(object); + void (T::*m)(void); + memcpy((char*)&m, member, sizeof(m)); + (o->*m)(); + } + + void (*_function)(void); // static function pointer - 0 if none attached + void *_object; // object this pointer - 0 if none attached + char _member[16]; // raw member function pointer storage - converted back by registered _membercaller + void (*_membercaller)(void*, char*); // registered membercaller function to convert back and call _member on _object +}; + +} // namespace mbed + +#endif