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/usr/include/buffy/utils/smartpointer.h is in libbuffy-dev 1.9.2-2.

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#ifndef BUFFY_UTILS_SMART_POINTER_H
#define BUFFY_UTILS_SMART_POINTER_H

/*
 * Copyright (C) 2004--2008  Enrico Zini <enrico@enricozini.org>
 *
 * 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 2.1 of the License, 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
 */

namespace buffy {

template<class ITEM>
class SmartPointer
{
protected:
	ITEM* impl;

public:
	SmartPointer() throw () : impl(0) {}

	SmartPointer(const SmartPointer& sp) throw ()
	{
		if (sp.impl)
			sp.impl->ref();
		impl = sp.impl;
	}

	SmartPointer(ITEM* otherimpl) throw ()
	{
		if (otherimpl)
			otherimpl->ref();
		impl = otherimpl;
	}

	~SmartPointer() throw ()
	{
		if (impl && impl->unref())
			delete impl;
	}

	SmartPointer& operator=(const SmartPointer& sp) throw ()
	{
		if (sp.impl)
			sp.impl->ref();  // Do it early to correctly handle the case of x = x;
		if (impl && impl->unref())
			delete impl;
		impl = sp.impl;
		return *this;
	}

	operator bool() const throw () { return impl != 0; }
};

class SmartPointerItem
{
protected:
	int _ref;

public:
	SmartPointerItem() throw () : _ref(0) {}
	
	/// Increment the reference count for this object
	void ref() throw () { ++_ref; }

	/// Decrement the reference count for this object, returning true when it
	/// reaches 0
	bool unref() throw () { return --_ref == 0; }
};

}

// vim:set ts=3 sw=3:
#endif