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93 lines
2.2 KiB
C++
93 lines
2.2 KiB
C++
/*
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* dev_tunnelled.h
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*
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* Home page of code is: http://smartmontools.sourceforge.net
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*
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* Copyright (C) 2008 Christian Franke <smartmontools-support@lists.sourceforge.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* You should have received a copy of the GNU General Public License
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* (for example COPYING); If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef DEV_TUNNELLED_H
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#define DEV_TUNNELLED_H
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#define DEV_TUNNELLED_H_CVSID "$Id: dev_tunnelled.h,v 1.1 2008/07/25 21:16:00 chrfranke Exp $\n"
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#include "dev_interface.h"
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/////////////////////////////////////////////////////////////////////////////
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// tunnelled_device_base
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/// Common functionality for all tunnelled_device classes.
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class tunnelled_device_base
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: virtual public /*implements*/ smart_device
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{
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protected:
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explicit tunnelled_device_base(smart_device * tunnel_dev);
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public:
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virtual ~tunnelled_device_base() throw();
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virtual bool is_open() const;
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virtual bool open();
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virtual bool close();
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virtual bool owns(const smart_device * dev) const;
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virtual void release(const smart_device * dev);
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private:
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smart_device * m_tunnel_base_dev;
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};
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/////////////////////////////////////////////////////////////////////////////
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// tunnelled_device
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/// Implement a device by tunneling through another device
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template <class BaseDev, class TunnelDev>
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class tunnelled_device
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: public BaseDev,
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public tunnelled_device_base
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{
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public:
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typedef TunnelDev tunnel_device_type;
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protected:
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explicit tunnelled_device(tunnel_device_type * tunnel_dev)
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: smart_device(smart_device::never_called),
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tunnelled_device_base(tunnel_dev),
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m_tunnel_dev(tunnel_dev)
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{ }
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public:
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virtual void release(const smart_device * dev)
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{
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if (m_tunnel_dev == dev)
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m_tunnel_dev = 0;
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tunnelled_device_base::release(dev);
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}
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tunnel_device_type * get_tunnel_dev()
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{ return m_tunnel_dev; }
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const tunnel_device_type * get_tunnel_dev() const
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{ return m_tunnel_dev; }
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private:
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tunnel_device_type * m_tunnel_dev;
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};
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#endif // DEV_TUNNELLED_H
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