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/*
* dev_tunnelled.h
*
* Home page of code is: http://www.smartmontools.org
*
* Copyright (C) 2008 Christian Franke <smartmontools-support@lists.sourceforge.net>
*
* 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, or (at your option)
* any later version.
*
* You should have received a copy of the GNU General Public License
* (for example COPYING); If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef DEV_TUNNELLED_H
#define DEV_TUNNELLED_H
#define DEV_TUNNELLED_H_CVSID "$Id: dev_tunnelled.h 4122 2015-08-27 19:08:07Z chrfranke $"
#include "dev_interface.h"
/////////////////////////////////////////////////////////////////////////////
// tunnelled_device_base
/// Common functionality for all tunnelled_device classes.
class tunnelled_device_base
: virtual public /*implements*/ smart_device
{
protected:
explicit tunnelled_device_base(smart_device * tunnel_dev);
public:
virtual ~tunnelled_device_base() throw();
virtual bool is_open() const;
virtual bool open();
virtual bool close();
virtual bool owns(const smart_device * dev) const;
virtual void release(const smart_device * dev);
private:
smart_device * m_tunnel_base_dev;
};
/////////////////////////////////////////////////////////////////////////////
// tunnelled_device
/// Implement a device by tunneling through another device
template <class BaseDev, class TunnelDev>
class tunnelled_device
: public BaseDev,
public tunnelled_device_base
{
public:
typedef TunnelDev tunnel_device_type;
protected:
explicit tunnelled_device(tunnel_device_type * tunnel_dev)
: smart_device(smart_device::never_called),
tunnelled_device_base(tunnel_dev),
m_tunnel_dev(tunnel_dev)
{ }
public:
virtual void release(const smart_device * dev)
{
if (m_tunnel_dev == dev)
m_tunnel_dev = 0;
tunnelled_device_base::release(dev);
}
tunnel_device_type * get_tunnel_dev()
{ return m_tunnel_dev; }
const tunnel_device_type * get_tunnel_dev() const
{ return m_tunnel_dev; }
private:
tunnel_device_type * m_tunnel_dev;
};
#endif // DEV_TUNNELLED_H
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