xorp

packet_queue.hh

00001 // -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*-
00002 
00003 // Copyright (c) 2001-2011 XORP, Inc and Others
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/packet_queue.hh,v 1.13 2008/10/02 21:58:16 bms Exp $
00021 
00022 #ifndef __RIP_PACKET_QUEUE_HH__
00023 #define __RIP_PACKET_QUEUE_HH__
00024 
00025 #include "libxorp/xorp.h"
00026 
00027 
00028 
00029 
00030 #include "packets.hh"
00031 
00032 
00040 template <typename A>
00041 class PacketQueue
00042 {
00043 public:
00044     typedef list<const RipPacket<A>*> QueueRep;
00045 
00046 public:
00047     PacketQueue();
00048     ~PacketQueue();
00049 
00059     void enqueue_packet(const RipPacket<A>* pkt);
00060 
00064     bool empty() const;
00065 
00071     const RipPacket<A>* head() const;
00072 
00076     void pop_head();
00077 
00084     bool drop_old();
00085 
00089     void flush_packets();
00090 
00094     void set_max_buffered_bytes(uint32_t mb);
00095 
00099     uint32_t max_buffered_bytes() const;
00100 
00104     uint32_t buffered_bytes() const;
00105 
00109     uint32_t drop_count() const;
00110 
00114     void reset_drop_count();
00115 
00116 protected:
00117     QueueRep    _ready_packets;
00118     uint32_t    _buffered_bytes;
00119     uint32_t    _max_buffered_bytes;
00120     uint32_t    _drops;
00121 };
00122 
00123 #endif // __RIP_PACKET_QUEUE_HH__
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