src/XPath/XPathAllocator.hpp

/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2001 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
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 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 * 4. The names "Xalan" and "Apache Software Foundation" must
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 * 5. Products derived from this software may not be called "Apache",
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 1999, International
 * Business Machines, Inc., http://www.ibm.com.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

#if !defined(XPATHALLOCATOR_INCLUDE_GUARD_135792455)
#define XPATHALLOCATOR_INCLUDE_GUARD_135792455



// Base include file.  Must be first.
#include <XPath/XPathDefinitions.hpp>



#include <PlatformSupport/ArenaAllocator.hpp>



#include <XPath/XPath.hpp>



class XALAN_XPATH_EXPORT XPathAllocator
{
public:

	typedef XPath							object_type;

#if defined(XALAN_NO_DEFAULT_TEMPLATE_ARGUMENTS)
	typedef ArenaBlock<object_type>			ArenaBlockType;

	typedef ArenaAllocator<object_type,
						   ArenaBlockType>	ArenaAllocatorType;
#else
	typedef ArenaAllocator<object_type>		ArenaAllocatorType;
#endif

	typedef ArenaAllocatorType::size_type	size_type;

	/**
	 * Construct an instance that will allocate blocks of the specified size.
	 *
	 * @param theBlockSize The block size.
	 */
	XPathAllocator(size_type	theBlockCount);

	~XPathAllocator();

	/**
	 * Create an XPath object using the allocator.
	 * 
	 * @return a pointer to an XPath
	 */
	object_type*
	create();

	/**
	 * Determine if an object is owned by the allocator...
	 */
	bool
	ownsObject(const object_type*	theObject)
	{
		return m_allocator.ownsObject(theObject);
	}

	/**
	 * Delete all XPath objects allocated.	 
	 */	
	void
	reset();

	/**
	 * Get the number of objects in each block.
	 *
	 * @return The size of the block
	 */
	size_type
	getBlockCount() const
	{
		return m_allocator.getBlockCount();
	}

	/**
	 * Get the number of blocks currently allocated.
	 *
	 * @return The number of blocks.
	 */
	size_type
	getBlockSize() const
	{
		return m_allocator.getBlockSize();
	}

private:

	// Not implemented...
	XPathAllocator(const XPathAllocator&);

	XPathAllocator&
	operator=(const XPathAllocator&);

	// Data members...
	ArenaAllocatorType	m_allocator;
};



#endif	// XNUMBERALLOCATOR_INCLUDE_GUARD_135792455