haiku/headers/private/package/hpkg/BlockBufferCacheImpl.h

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/*
* Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
* Copyright 2011, Oliver Tappe <zooey@hirschkaefer.de>
* Distributed under the terms of the MIT License.
*/
#ifndef _PACKAGE__HPKG__PRIVATE__BLOCK_BUFFER_CACHE_H_
#define _PACKAGE__HPKG__PRIVATE__BLOCK_BUFFER_CACHE_H_
#include <SupportDefs.h>
#include <util/DoublyLinkedList.h>
#include <package/hpkg/BufferCache.h>
namespace BPackageKit {
namespace BHPKG {
namespace BPrivate {
class CachedBuffer;
class BlockBufferCacheImpl : public BBufferCache {
public:
BlockBufferCacheImpl(size_t blockSize,
uint32 maxCachedBlocks,
BBufferCacheLockable* lockable);
~BlockBufferCacheImpl();
status_t Init();
CachedBuffer* GetBuffer(size_t size,
CachedBuffer** owner = NULL,
bool* _newBuffer = NULL);
void PutBufferAndCache(CachedBuffer** owner);
void PutBuffer(CachedBuffer** owner);
private:
typedef DoublyLinkedList<CachedBuffer> BufferList;
private:
CachedBuffer* _AllocateBuffer(size_t size,
CachedBuffer** owner, bool* _newBuffer);
// object must not be locked
private:
size_t fBlockSize;
uint32 fMaxCachedBlocks;
uint32 fAllocatedBlocks;
BufferList fUnusedBuffers;
BufferList fCachedBuffers;
BBufferCacheLockable* fLockable;
};
} // namespace BPrivate
} // namespace BHPKG
} // namespace BPackageKit
#endif // _PACKAGE__HPKG__PRIVATE__BLOCK_BUFFER_CACHE_H_