Message.hh

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 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
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#ifndef __MEM_RUBY_SLICC_INTERFACE_MESSAGE_HH__
#define __MEM_RUBY_SLICC_INTERFACE_MESSAGE_HH__
 
#include <iostream>
#include <memory>
#include <stack>
 
#include "mem/packet.hh"
#include "mem/ruby/common/NetDest.hh"
#include "mem/ruby/common/WriteMask.hh"
#include "mem/ruby/protocol/MessageSizeType.hh"
 
namespace gem5
{
 
namespace ruby
{
 
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) = default;
 
    virtual ~Message() { }
 
    virtual MsgPtr clone() const = 0;
    virtual void print(std::ostream& out) const = 0;
 
    virtual const MessageSizeType& getMessageSize() const
    { panic("MessageSizeType() called on wrong message!"); }
    virtual MessageSizeType& getMessageSize()
    { panic("MessageSizeType() called on wrong message!"); }
 
    virtual bool functionalRead(Packet *pkt)
    { panic("functionalRead(Packet) not implemented"); }
    virtual bool functionalRead(Packet *pkt, WriteMask &mask)
    { panic("functionalRead(Packet,WriteMask) not implemented"); }
    virtual bool functionalWrite(Packet *pkt)
    { panic("functionalWrite(Packet) not implemented"); }
 
    void updateDelayedTicks(Tick curTime)
    {
        assert(m_LastEnqueueTime <= curTime);
        Tick delta = curTime - m_LastEnqueueTime;
        m_DelayedTicks += delta;
    }
    Tick getDelayedTicks() const {return m_DelayedTicks;}
 
    void setLastEnqueueTime(const Tick& time) { m_LastEnqueueTime = time; }
    Tick getLastEnqueueTime() const {return m_LastEnqueueTime;}
 
    Tick getTime() const { return m_time; }
    void setMsgCounter(uint64_t c) { m_msg_counter = c; }
    uint64_t getMsgCounter() const { return m_msg_counter; }
 
    // Functions related to network traversal
    virtual const NetDest& getDestination() const
    { panic("getDestination() called on wrong message!"); }
    virtual NetDest& getDestination()
    { panic("getDestination() called on wrong message!"); }
 
    int getIncomingLink() const { return incoming_link; }
    void setIncomingLink(int link) { incoming_link = link; }
    int getVnet() const { return vnet; }
    void setVnet(int net) { vnet = net; }
 
  private:
    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?
 
    // Variables for required network traversal
    int incoming_link;
    int vnet;
};
 
inline bool
operator>(const MsgPtr &lhs, const MsgPtr &rhs)
{
    const Message *l = lhs.get();
    const Message *r = rhs.get();
 
    if (l->getLastEnqueueTime() == r->getLastEnqueueTime()) {
        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;
}
 
} // namespace ruby
} // namespace gem5
 
#endif // __MEM_RUBY_SLICC_INTERFACE_MESSAGE_HH__