xorp

rib_notifier_base.hh

00001 // -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*-
00002 
00003 // Copyright (c) 2001-2009 XORP, Inc.
00004 //
00005 // This program is free software; you can redistribute it and/or modify
00006 // it under the terms of the GNU General Public License, Version 2, June
00007 // 1991 as published by the Free Software Foundation. Redistribution
00008 // and/or modification of this program under the terms of any other
00009 // version of the GNU General Public License is not permitted.
00010 // 
00011 // This program is distributed in the hope that it will be useful, but
00012 // WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For more details,
00014 // see the GNU General Public License, Version 2, a copy of which can be
00015 // found in the XORP LICENSE.gpl file.
00016 // 
00017 // XORP Inc, 2953 Bunker Hill Lane, Suite 204, Santa Clara, CA 95054, USA;
00018 // http://xorp.net
00019 
00020 // $XORP: xorp/rip/rib_notifier_base.hh,v 1.8 2008/10/02 21:58:17 bms Exp $
00021 
00022 #ifndef __RIP_RIB_NOTIFIER_BASE_HH__
00023 #define __RIP_RIB_NOTIFIER_BASE_HH__
00024 
00025 #include "libxorp/eventloop.hh"
00026 #include "update_queue.hh"
00027 
00028 class EventLoop;
00029 
00040 template <typename A>
00041 class RibNotifierBase {
00042 public:
00043     static const uint32_t DEFAULT_POLL_MS = 1000;
00044 
00045 public:
00046     RibNotifierBase(EventLoop&      eventloop,
00047             UpdateQueue<A>& update_queue,
00048             uint32_t        poll_ms = DEFAULT_POLL_MS);
00049     virtual ~RibNotifierBase();
00050 
00051 protected:
00052     virtual void updates_available() = 0;
00053 
00054 protected:
00055     void start_polling();
00056     void stop_polling();
00057     bool poll_updates();
00058 
00059 protected:
00060     EventLoop&                  _e;
00061     UpdateQueue<A>&             _uq;
00062     typename UpdateQueue<A>::ReadIterator   _ri;
00063     uint32_t                    _poll_ms;
00064     XorpTimer                   _t;
00065 };
00066 
00067 #endif // __RIP_RIB_NOTIFIER_BASE_HH__
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