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/*
* Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __MEM_RUBY_SLICC_INTERFACE_MESSAGE_HH__
#define __MEM_RUBY_SLICC_INTERFACE_MESSAGE_HH__
#include <iostream>
#include <memory>
#include <stack>
#include "mem/packet.hh"
class Message;
typedef std::shared_ptr<Message> MsgPtr;
class Message
{
public:
Message(Tick curTime)
: m_time(curTime),
m_LastEnqueueTime(curTime),
m_DelayedTicks(0), m_msg_counter(0)
{ }
Message(const Message &other)
: m_time(other.m_time),
m_LastEnqueueTime(other.m_LastEnqueueTime),
m_DelayedTicks(other.m_DelayedTicks),
m_msg_counter(other.m_msg_counter)
{ }
virtual ~Message() { }
virtual MsgPtr clone() const = 0;
virtual void print(std::ostream& out) const = 0;
virtual void setIncomingLink(int) {}
virtual void setVnet(int) {}
/**
* The two functions below are used for reading / writing the message
* functionally. The methods return true if the address in the packet
* matches the address / address range in the message. Each message
* class that can be potentially searched for the address needs to
* implement these methods.
*/
virtual bool functionalRead(Packet *pkt) = 0;
virtual bool functionalWrite(Packet *pkt) = 0;
//! Update the delay this message has experienced so far.
void updateDelayedTicks(Tick curTime)
{
assert(m_LastEnqueueTime <= curTime);
Tick delta = curTime - m_LastEnqueueTime;
m_DelayedTicks += delta;
}
const Tick getDelayedTicks() const {return m_DelayedTicks;}
void setLastEnqueueTime(const Tick& time) { m_LastEnqueueTime = time; }
const Tick getLastEnqueueTime() const {return m_LastEnqueueTime;}
const Tick& getTime() const { return m_time; }
void setMsgCounter(uint64_t c) { m_msg_counter = c; }
uint64_t getMsgCounter() const { return m_msg_counter; }
private:
const Tick m_time;
Tick m_LastEnqueueTime; // my last enqueue time
Tick m_DelayedTicks; // my delayed cycles
uint64_t m_msg_counter; // FIXME, should this be a 64-bit value?
};
inline bool
operator>(const MsgPtr &lhs, const MsgPtr &rhs)
{
const Message *l = lhs.get();
const Message *r = rhs.get();
if (l->getLastEnqueueTime() == r->getLastEnqueueTime()) {
assert(l->getMsgCounter() != r->getMsgCounter());
return l->getMsgCounter() > r->getMsgCounter();
}
return l->getLastEnqueueTime() > r->getLastEnqueueTime();
}
inline std::ostream&
operator<<(std::ostream& out, const Message& obj)
{
obj.print(out);
out << std::flush;
return out;
}
#endif // __MEM_RUBY_SLICC_INTERFACE_MESSAGE_HH__
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