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58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
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/*
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* Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef BLOCK_BUFFER_CACHE_H
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#define BLOCK_BUFFER_CACHE_H
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#include "BufferCache.h"
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class BlockBufferCache : public BufferCache {
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public:
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BlockBufferCache(size_t blockSize,
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uint32 maxCachedBlocks);
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virtual ~BlockBufferCache();
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virtual status_t Init();
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virtual CachedBuffer* GetBuffer(size_t size,
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CachedBuffer** owner = NULL,
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bool* _newBuffer = NULL);
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virtual void PutBufferAndCache(CachedBuffer** owner);
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virtual void PutBuffer(CachedBuffer** owner);
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virtual bool Lock() = 0;
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virtual void Unlock() = 0;
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private:
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typedef DoublyLinkedList<CachedBuffer> BufferList;
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private:
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CachedBuffer* _AllocateBuffer(size_t size,
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CachedBuffer** owner, bool* _newBuffer);
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// object must not be locked
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private:
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size_t fBlockSize;
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uint32 fMaxCachedBlocks;
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uint32 fAllocatedBlocks;
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BufferList fUnusedBuffers;
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BufferList fCachedBuffers;
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};
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class BlockBufferCacheNoLock : public BlockBufferCache {
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public:
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BlockBufferCacheNoLock(size_t blockSize,
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uint32 maxCachedBlocks);
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virtual ~BlockBufferCacheNoLock();
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virtual bool Lock();
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virtual void Unlock();
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};
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#endif // BLOCK_BUFFER_CACHE_H
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