60e92986f7
and to remove elements in the middle of the fifo. These elements
do not free space, they are just marked removed. Space is only
freed from the front of the fifo.
dev/etherpkt.cc:
serialize the current slack
dev/etherpkt.hh:
add "slack" to the ethernet packet. It is to be used by any fifo that
the packet is currently in to account for extra space that the packet
may be occupying due to the fifo organization.
--HG--
extra : convert_revision : 8e7c541ba316a9a76495c54cc5f707f8fc65b6d5
85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
/*
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* Copyright (c) 2002-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* @file
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* Reference counted class containing ethernet packet data
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*/
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#ifndef __ETHERPKT_HH__
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#define __ETHERPKT_HH__
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#include <iosfwd>
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#include <memory>
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#include <assert.h>
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#include "base/refcnt.hh"
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#include "sim/host.hh"
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/*
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* Reference counted class containing ethernet packet data
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*/
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class Checkpoint;
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class PacketData : public RefCounted
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{
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public:
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/*
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* Pointer to packet data will be deleted
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*/
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uint8_t *data;
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/*
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* Length of the current packet
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*/
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int length;
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/*
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* Extra space taken up by the packet in whatever data structure
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* it is in.
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*
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* NOTE: This can only be use by *one* data structure at a time!
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*/
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int slack;
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public:
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PacketData() : data(NULL), length(0), slack(0) { }
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explicit PacketData(size_t size)
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: data(new uint8_t[size]), length(0), slack(0) { }
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PacketData(std::auto_ptr<uint8_t> d, int l, int s = 0)
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: data(d.release()), length(l), slack(s) { }
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~PacketData() { if (data) delete [] data; }
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public:
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void serialize(const std::string &base, std::ostream &os);
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void unserialize(const std::string &base, Checkpoint *cp,
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const std::string §ion);
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};
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typedef RefCountingPtr<PacketData> PacketPtr;
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#endif // __ETHERPKT_HH__
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