Mark Turner
/
lightsense_kl46z_basic_v1
Basic fading in and out of leds with light sensor.
Diff: mbed/FunctionPointer.h
- Revision:
- 0:cf7af2656659
diff -r 000000000000 -r cf7af2656659 mbed/FunctionPointer.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed/FunctionPointer.h Mon Sep 19 03:24:58 2016 +0000 @@ -0,0 +1,94 @@ +/* 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 { + +typedef void (*pvoidf_t)(void); + +/** 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(); + + pvoidf_t get_function() const { + return (pvoidf_t)_function; + } + +#ifdef MBED_OPERATORS + void operator ()(void); +#endif + +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