// -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*-// Copyright (c) 2001-2008 XORP, Inc.//// Permission is hereby granted, free of charge, to any person obtaining a// copy of this software and associated documentation files (the "Software")// to deal in the Software without restriction, subject to the conditions// listed in the XORP LICENSE file. These conditions include: you must// preserve this copyright notice, and you cannot mention the copyright// holders in advertising related to the Software without their permission.// The Software is provided WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED. This// notice is a summary of the XORP LICENSE file; the license in that file is// legally binding.// $XORP: xorp/rip/rib_notifier_base.hh,v 1.7 2008/07/23 05:11:36 pavlin Exp $#ifndef __RIP_RIB_NOTIFIER_BASE_HH__#define __RIP_RIB_NOTIFIER_BASE_HH__#include "libxorp/eventloop.hh"#include "update_queue.hh"class EventLoop;/** * @short Base class for RIB notificatiers. * * This class acts as a base class for RIB notifiers.  RIB notifiers * are classes that convey RIP routes to the RIB.  The base class * implements update queue polling.  When polling is enabled, it polls * the UpdateQueue periodically for updates to be send to the RIB.  If * updates are available available it calls @ref updates_available() * which derived classes implement according to their needs. */template <typename A>class RibNotifierBase {public:    static const uint32_t DEFAULT_POLL_MS = 1000;public:    RibNotifierBase(EventLoop&	    eventloop,		    UpdateQueue<A>& update_queue,		    uint32_t	    poll_ms = DEFAULT_POLL_MS);    virtual ~RibNotifierBase();protected:    virtual void updates_available() = 0;protected:    void start_polling();    void stop_polling();    bool poll_updates();protected:    EventLoop&					_e;    UpdateQueue<A>&		  		_uq;    typename UpdateQueue<A>::ReadIterator	_ri;    uint32_t					_poll_ms;    XorpTimer					_t;};#endif // __RIP_RIB_NOTIFIER_BASE_HH__