/*
 * Copyright (c) 2003 Marcus Overhagen
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a 
 * copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation 
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the 
 * Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in 
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 * DEALINGS IN THE SOFTWARE.
 */
#ifndef _BLOCK_CACHE_H
#define _BLOCK_CACHE_H

#include <BeBuild.h>
#include <Locker.h>

/* The OpenBeOS implementation of the BBlockCache.
 * A class used to manage a pool of memory blocks.
 */

/* The allocation type to be used in the constructor
 */
enum {
	B_OBJECT_CACHE = 0,
	B_MALLOC_CACHE = 1
};

/* The BBlockCache class:
 */
class BBlockCache
{
public:
				BBlockCache(uint32 blockCount,
							size_t blockSize,
							uint32 allocationType);
	virtual		~BBlockCache();

	void *		Get(size_t blockSize);
	void		Save(void *pointer, size_t blockSize);

/* Private or reserved functions and data
 */
private:
	virtual	void _ReservedBlockCache1();
	virtual	void _ReservedBlockCache2();

				BBlockCache(const BBlockCache &);
	BBlockCache	&operator=(const BBlockCache &);

	struct _FreeBlock;

	_FreeBlock *fFreeList;
	size_t		fBlockSize;
	int32		fFreeBlocks;
	int32		fBlockCount;
	BLocker		fLocker;
	void *		(*fAlloc)(size_t size);
	void		(*fFree)(void *pointer);
	uint32		_reserved[2];
};

#endif