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mbed/FunctionPointer.h
- Committer:
- antbig
- Date:
- 2016-04-13
- Revision:
- 0:ad97421fb1fb
File content as of revision 0:ad97421fb1fb:
/* 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