Channel.h

// Channel.h -- The super class of communication channels for PCSPs.

/*
 * Copyright (C) 1998 Tudor Hulubei <tudor@hulubei.net>.
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2, or (at
 * your option) any later version.
 *
 * This library 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA,
 * 02111-1307, USA.
 */

/*
 * NOTE: This is an interal header file.
 * You should not attempt to use it directly.
 */

// $Id: Channel_8h-source.html,v 1.1 2005/05/25 12:37:18 tudor Exp $

#ifndef _CSP_KERNEL_Channel_H
#define _CSP_KERNEL_Channel_H


CSP_NAMESPACE_BEGIN(csp);


class CSP_API Channel
{
  public:
    Channel() : m_size(-1), m_rank(-1), m_closed(false) {}
    virtual ~Channel() {}

    int size() const { return m_size; }
    int rank() const { return m_rank; }
    bool closed() const { return m_closed; }

    void close() { assert(!m_closed); m_closed = true; }

    virtual void sendInt(int destRank, int i) const = 0;

    virtual int recvInt(int& srcRank) const = 0;

    virtual int recvIntFrom(int srcRank) const = 0;

    virtual void sendBytes(
        int destRank,
        const unsigned char* buf,
        int count) const = 0;

    virtual unsigned char* recvBytes(int srcRank, int count) const = 0;

  protected:
    Channel(const Channel&);

    Channel& operator=(const Channel&);

    int m_size;

    int m_rank;

    bool m_closed;
};


CSP_NAMESPACE_END(csp);


#endif // _CSP_KERNEL_Channel_H

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