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io.h

/*
 *   Copyright  2008 dragchan <zgchan317@gmail.com>
 *
 *   This program is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU General Public License
 *   as published by the Free Software Foundation; either version 2
 *   of the License, or (at your option) any later version.
 *
 *   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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#ifndef IO_H
#define IO_H

#include "type.h"
#include "instance.h"

class IoPipe {
public:
      IoPipe();
      virtual ~IoPipe();

      void ready(bool isread);
      s32 fd() {
            return mFd;
      }

      static const s8 *localCodec();

protected:
      void setFd(s32 fd);
      void setCodec(const s8 *up, const s8 *down);
      void write(s8 *buf, u32 len);

      virtual void readyRead(s8 *buf, u32 len) = 0;
      virtual void ioEnd() {}

private:
      void translate(bool isread, s8 *buf, u32 len);

      s32 mFd;
      void *mCodecRead, *mCodecWrite;
      s8 mBufRead[16], mBufWrite[16];
      u32 mBufLenRead, mBufLenWrite;
};

class IoDispatcher {
      DECLARE_INSTANCE(IoDispatcher)
private:
      virtual void addIoSource(IoPipe *src, bool isread) = 0;
      virtual void removeIoSource(IoPipe *src, bool isread) = 0;

      friend class IoPipe;
};

#endif

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