observer

// vi:set ft=cpp: -*- Mode: C++ -*-
/*
 * (c) 2010 Alexander Warg <warg@os.inf.tu-dresden.de>
 *     economic rights: Technische Universität Dresden (Germany)
 *
 * This file is part of TUD:OS and distributed under the terms of the
 * GNU General Public License 2.
 * Please see the COPYING-GPL-2 file for details.
 */
#pragma once
 
#include <l4/cxx/hlist>
 
namespace cxx {
 
class Observer : public H_list_item
{
public:
  virtual void notify() = 0;
};
 
class Notifier : public H_list<Observer>
{
public:
  void notify()
  {
    for (Iterator i = begin(); i != end(); ++i)
      i->notify();
  }
};
 
}