1 files changed, 96 insertions, 0 deletions
diff --git a/sci-libs/libspatialindex/svn/trunk/include/tools/PoolPointer.h b/sci-libs/libspatialindex/svn/trunk/include/tools/PoolPointer.h
new file mode 100755
index 000000000..3382e8487
--- /dev/null
+++ b/sci-libs/libspatialindex/svn/trunk/include/tools/PoolPointer.h
@@ -0,0 +1,96 @@
+// Spatial Index Library
+//
+// Copyright (C) 2004  Navel Ltd.
+//
+// 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
+//
+//  Email:
+//    mhadji@gmail.com
+
+#pragma once
+
+#include "PointerPool.h"
+
+namespace Tools
+{
+	template <class X> class PointerPool;
+
+	template <class X> class PoolPointer
+	{
+	public:
+		explicit PoolPointer(X* p = 0) : m_pointer(p), m_pPool(0) { m_prev = m_next = this; }
+		explicit PoolPointer(X* p, PointerPool<X>* pPool) throw() : m_pointer(p), m_pPool(pPool) { m_prev = m_next = this; }
+		~PoolPointer() { release(); }
+		PoolPointer(const PoolPointer& p) throw() { acquire(p); }
+		PoolPointer& operator=(const PoolPointer& p)
+		{
+			if (this != &p)
+			{
+				release();
+				acquire(p);
+			}
+			return *this;
+		}
+
+		X& operator*() const throw() { return *m_pointer; }
+		X* operator->() const throw() { return m_pointer; }
+		X* get() const throw() { return m_pointer; }
+		bool unique() const throw() { return m_prev ? m_prev == this : true; }
+		void relinquish() throw()
+		{
+			m_pPool = 0;
+			m_pointer = 0;
+			release();
+		}
+
+	private:
+		X* m_pointer;
+		mutable const PoolPointer* m_prev;
+		mutable const PoolPointer* m_next;
+		PointerPool<X>* m_pPool;
+
+		void acquire(const PoolPointer& p) throw()
+		{
+			m_pPool = p.m_pPool;
+			m_pointer = p.m_pointer;
+			m_next = p.m_next;
+			m_next->m_prev = this;
+			m_prev = &p;
+			#ifndef mutable
+			p.m_next = this;
+			#else
+			(const_cast<linked_ptr<X>*>(&p))->m_next = this;
+			#endif
+		}
+
+		void release()
+		{
+			if (unique())
+			{
+				if (m_pPool != 0) m_pPool->release(m_pointer);
+				else delete m_pointer;
+			}
+			else
+			{
+				m_prev->m_next = m_next;
+				m_next->m_prev = m_prev;
+				m_prev = m_next = 0;
+			}
+			m_pointer = 0;
+			m_pPool = 0;
+		}
+	};
+}
+