config AX12
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Diff: mbed/FunctionPointer.h
- Revision:
- 0:c03cffe402df
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed/FunctionPointer.h Wed Feb 03 14:01:53 2016 +0000 @@ -0,0 +1,86 @@ +/* mbed Microcontroller Library - FunctionPointer + * Copyright (c) 2007-2009 ARM Limited. All rights reserved. + */ + +#ifndef MBED_FUNCTIONPOINTER_H +#define MBED_FUNCTIONPOINTER_H + +#include <string.h> + +namespace mbed { + +/* Class FunctionPointer + * A class for storing and calling a pointer to a static or member void function + */ +class FunctionPointer { + +public: + + /* Constructor FunctionPointer + * Create a FunctionPointer, attaching a static function + * + * Variables + * function - The void static function to attach (default is none) + */ + FunctionPointer(void (*function)(void) = 0); + + /* Constructor FunctionPointer + * Create a FunctionPointer, attaching a member function + * + * Variables + * object - The object pointer to invoke the member function on (i.e. the this pointer) + * function - The address of the void member function to attach + */ + template<typename T> + FunctionPointer(T *object, void (T::*member)(void)) { + attach(object, member); + } + + /* Function attach + * Attach a static function + * + * Variables + * function - The void static function to attach (default is none) + */ + void attach(void (*function)(void) = 0); + + /* Function attach + * Attach a member function + * + * Variables + * object - The object pointer to invoke the member function on (i.e. the this pointer) + * 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; + } + + /* Function call + * 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