ByteBlockPool.h

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// Copyright (c) 2009-2014 Alan Wright. All rights reserved.
// Distributable under the terms of either the Apache License (Version 2.0)
// or the GNU Lesser General Public License.
 
#ifndef BYTEBLOCKPOOL_H
#define BYTEBLOCKPOOL_H
 
#include "LuceneObject.h"
 
namespace Lucene {

class LPPAPI ByteBlockPool : public LuceneObject {
public:
    ByteBlockPool(const ByteBlockPoolAllocatorBasePtr& allocator, bool trackAllocations);
    virtual ~ByteBlockPool();
 
    LUCENE_CLASS(ByteBlockPool);
 
public:
    Collection<ByteArray> buffers;
    int32_t bufferUpto; // Which buffer we are up to
    int32_t byteUpto; // Where we are in head buffer
 
    ByteArray buffer;
    int32_t byteOffset;
 
    static const int32_t nextLevelArray[];
    static const int32_t levelSizeArray[];
 
protected:
    bool trackAllocations;
    ByteBlockPoolAllocatorBasePtr allocator;
 
public:
    static int32_t FIRST_LEVEL_SIZE();
 
    void reset();
    void nextBuffer();
    int32_t newSlice(int32_t size);
    int32_t allocSlice(ByteArray slice, int32_t upto);
};
 
class LPPAPI ByteBlockPoolAllocatorBase : public LuceneObject {
public:
    virtual ~ByteBlockPoolAllocatorBase();
 
    LUCENE_CLASS(ByteBlockPoolAllocatorBase);
 
public:
    virtual void recycleByteBlocks(Collection<ByteArray> blocks, int32_t start, int32_t end) = 0;
    virtual void recycleByteBlocks(Collection<ByteArray> blocks) = 0;
    virtual ByteArray getByteBlock(bool trackAllocations) = 0;
};
 
}
 
#endif