blockusage.h

我们自己写的miniSQL代码

// BlockUsage.h: interface for the BlockUsage class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_BLOCKUSAGE_H__2CB91D96_9E6A_4981_B2F8_2885FDDE7177__INCLUDED_)
#define AFX_BLOCKUSAGE_H__2CB91D96_9E6A_4981_B2F8_2885FDDE7177__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include "BufferManager.h"



class BlockUsage  
{
public:
	void delete_a_block(int BlockNo);
	void GetBlockHead();
	BufferManager* BM;
	void set_BufferManager(BufferManager* Buffer_Manager);
	void delete_block_list(int count,int list[]);
	int add();
	BlockUsage();
	virtual ~BlockUsage();

private:
	char* Block_head;

};

#endif // !defined(AFX_BLOCKUSAGE_H__2CB91D96_9E6A_4981_B2F8_2885FDDE7177__INCLUDED_)