bridge.h

Go to the documentation of this file.

//    sampalib.org ESL library and tools
//    Copyright (C) 2007  Thierry Grellier
//
//    This program is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License version 2 as
//    published by the Free Software Foundation.
//
//    This program is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License along
//    with this program; if not, write to the Free Software Foundation, Inc.,
//    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
//    contact: www.sampalib.org

#ifndef SAMPA_BRIDGE_H
#define SAMPA_BRIDGE_H

#include "sampa/component/protocol.h"
#include "sampa/core/gated.h"
#include "sampa/core/select.h"

namespace Sampa {

  class Bridge : public Module, public TargetRequestInterface, public InitiatorResponseInterface {
    SAMPA_MODULE(Bridge);
  public:
    Bridge(const Name& name);
   
    void bind_target_clock(Clock* clock);
    void bind_target(Target* slave);
    Initiator* get_initiator() { return &p_slave; }

    void bind_initiator_clock(Clock* clock);
    void bind_initiator(Initiator* master);
    Target* get_target()    { return &p_master; }

    bool recieve_request(const Request& request);
    bool recieve_response(const Response& response);
    
  private: 

    void complete_restart();
    
    enum State {
      WAIT_REQUEST_FROM_MASTER,
      FORWARD_REQUEST_TO_SLAVE,
      WAIT_SLAVE_RESPONSE,
      FORWARD_RESPONSE_TO_MASTER,
      WAIT_RESPONSE_ACCEPTED_BY_MASTER
    };

    void execute();

    Clock*          p_master_clock;
    Target          p_master;
    Clock*          p_slave_clock;
    Initiator       p_slave;
    State           m_state;
    bool            m_accept_request;
    EventListener   e_new_request; 
    ClockedEvent    e_sync_master; 
    ClockedEvent    e_sync_slave; 
    Gated<Request>  m_request;
    Gated<Response> m_response;
  };
  
}

#endif

---