peq_with_get.h

SystemC Transaction Level Modelling. 是基于SystemC之上的总线互联协议

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  source code Copyright (c) 1996-2008 by all Contributors.
  All Rights reserved.

  The contents of this file are subject to the restrictions and limitations
  set forth in the SystemC Open Source License Version 3.0 (the "License");
  You may not use this file except in compliance with such restrictions and
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#ifndef __PEQ_WITH_GET_H__
#define __PEQ_WITH_GET_H__

//#include "tlm.h"
#include <systemc>
#include <map>

namespace tlm_utils {

template <class PAYLOAD>
class peq_with_get : public sc_core::sc_object
{
public:
  typedef PAYLOAD transaction_type;
  typedef std::pair<const sc_core::sc_time, transaction_type*> pair_type;

public:
  peq_with_get(const char* name) : sc_core::sc_object(name)
  {
  }

  void notify(transaction_type& trans, sc_core::sc_time& t)
  {
    m_scheduled_events.insert(pair_type(t + sc_core::sc_time_stamp(), &trans));
    m_event.notify(t);
  }

  void notify(transaction_type& trans)
  {
    m_scheduled_events.insert(pair_type(sc_core::sc_time_stamp(), &trans));
    m_event.notify(); // immediate notification
  }

  // needs to be called until it returns 0
  transaction_type* get_next_transaction()
  {
    if (m_scheduled_events.empty()) {
      return 0;
    }

    sc_core::sc_time now = sc_core::sc_time_stamp();
    if (m_scheduled_events.begin()->first <= now) {
      transaction_type* trans = m_scheduled_events.begin()->second;
      m_scheduled_events.erase(m_scheduled_events.begin());
      return trans;
    }

    m_event.notify(m_scheduled_events.begin()->first - now);
    
    return 0;
  }

  sc_core::sc_event& get_event()
  {
    return m_event;
  }

private:
  std::multimap<const sc_core::sc_time, transaction_type*> m_scheduled_events;
  sc_core::sc_event m_event;
};

}

#endif