ceph/branches/riccardo/monitor2/msg/MTMessenger.h

// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
/*
 * Ceph - scalable distributed file system
 *
 * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
 *
 * This is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 2.1, as published by the Free Software 
 * Foundation.  See file COPYING.
 * 
 */


#ifndef __MTMESSENGER_H
#define __MTMESSENGER_H

#include "Message.h"
#include "SerialMessenger.h"

// Marshall and unmarshall OBFS messages, send and receive them over
// MPI.

class MTMessenger
{
public:
    // sets up the queues and internal thread; the MPI initialization
    // will scan argc/argv for MPI specific flags and remove them from
    // argc/argv.
    MTMessenger(int &argc, char **&argv);

    // tears it all down
    ~MTMessenger();

    // send a request to a server and wait (block) for the response;
    virtual Message *sendrecv(Message *m, entity_name_t dest);

    // wait (block) for a request from anyone
    Message *recvreq();

    // forward request, masquerading as original source
    void fwdreq(Message *req, int dest);

    // send the response to the originator of the request
    virtual void sendresp(Message *req, Message *resp);


}; // class MTMessenger

#endif // __MTMESSENGER_H