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// Copyright (C) 2004 Navel Ltd.
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#ifndef __tools_pool_pointer_h
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#define __tools_pool_pointer_h
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#include "PointerPool.h"
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template <class X> class PointerPool;
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template <class X> class PoolPointer
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explicit PoolPointer( X* p = 0 ) : m_pointer( p ), m_pPool( 0 ) { m_prev = m_next = this; }
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explicit PoolPointer( X* p, PointerPool<X>* pPool ) throw() : m_pointer( p ), m_pPool( pPool ) { m_prev = m_next = this; }
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~PoolPointer() { release(); }
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PoolPointer( const PoolPointer& p ) throw() { acquire( p ); }
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PoolPointer& operator=( const PoolPointer& p )
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X& operator*() const throw() { return *m_pointer; }
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X* operator->() const throw() { return m_pointer; }
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X* get() const throw() { return m_pointer; }
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bool unique() const throw() { return m_prev ? m_prev == this : true; }
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void relinquish() throw()
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mutable const PoolPointer* m_prev;
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mutable const PoolPointer* m_next;
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PointerPool<X>* m_pPool;
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void acquire( const PoolPointer& p ) throw()
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m_pointer = p.m_pointer;
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m_next->m_prev = this;
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( const_cast<linked_ptr<X>*>( &p ) )->m_next = this;
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if ( m_pPool != 0 ) m_pPool->release( m_pointer );
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else delete m_pointer;
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m_prev->m_next = m_next;
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m_next->m_prev = m_prev;
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#endif /* __tools_pool_pointer_h */