haiku/headers/os/support/BlockCache.h
Ingo Weinhold 340eed61d6 Moved definition of _FreeBlock to the source file and enabled its "magic{1,2}" fields on debug only.
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4525 a95241bf-73f2-0310-859d-f6bbb57e9c96
2003-09-07 12:04:24 +00:00

74 lines
2.1 KiB
C++

/*
* 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 /* _BLOCK_CACHE_H */