text: /* 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
  