BlockCache.h revision 29e8fa59
1/*
2 * Copyright (c) 2003 Marcus Overhagen
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
21 */
22#ifndef _BLOCK_CACHE_H
23#define _BLOCK_CACHE_H
24
25
26#include <BeBuild.h>
27#include <Locker.h>
28
29
30// The allocation type to be used in the constructor
31enum {
32	B_OBJECT_CACHE = 0,
33	B_MALLOC_CACHE = 1
34};
35
36class BBlockCache {
37	public:
38		BBlockCache(uint32 blockCount, size_t blockSize,
39			uint32 allocationType);
40		virtual	~BBlockCache();
41
42		void*	Get(size_t blockSize);
43		void	Save(void *pointer, size_t blockSize);
44
45	private:
46		virtual	void _ReservedBlockCache1();
47		virtual	void _ReservedBlockCache2();
48
49		BBlockCache(const BBlockCache &);
50		BBlockCache	&operator=(const BBlockCache &);
51
52		struct _FreeBlock;
53
54		_FreeBlock*	fFreeList;
55		size_t		fBlockSize;
56		int32		fFreeBlocks;
57		int32		fBlockCount;
58		BLocker		fLocker;
59		void*		(*fAlloc)(size_t size);
60		void		(*fFree)(void *pointer);
61		uint32		_reserved[2];
62};
63
64
65#endif	// _BLOCK_CACHE_H
66