wiscdb::BufferHashTable Class Reference

#include <bufferHashTable.h>

Public Member Functions
	BufferHashTable (const int htSize)
	~BufferHashTable ()
void	insert (const File *file, const PageId pageNo, const FrameId frameNo)
void	lookup (const File *file, const PageId pageNo, FrameId &frameNo)
void	remove (const File *file, const PageId pageNo)

Detailed Description

@brief Hash table class to keep track of pages in the buffer pool

Definition at line 44 of file bufferHashTable.h.

Constructor & Destructor Documentation

wiscdb::BufferHashTable::BufferHashTable

(

const int

htSize

)

Constructor of BufferHashTable class

wiscdb::BufferHashTable::~BufferHashTable

(

)

Destructor of BufferHashTable class

Member Function Documentation

void wiscdb::BufferHashTable::insert	(	const File *	file,
		const PageId	pageNo,
		const FrameId	frameNo
	)

Insert entry into hash table. Maps (file, pageNo) to bucket and inserts a HashItem.

@param file File object @param pageNo Page number in the file @param frameNo Frame number assigned to that page of the file @throws HashAlreadyPresentException if the corresponding file/page already exists in the hash table

void wiscdb::BufferHashTable::lookup	(	const File *	file,
		const PageId	pageNo,
		FrameId &	frameNo
	)

Check if (file, pageNo) is currently in the buffer pool (ie. in the hash table). Returns frame number of location in pool

@param file File object @param pageNo Page number in the file @param frameNo Frame number reference containing the result of lookup @throws HashNotFoundException if the file/page entry is not found in the hash table

void wiscdb::BufferHashTable::remove	(	const File *	file,
		const PageId	pageNo
	)

Remove (file,pageNo) the buffer pool by deleting the appropriate item from hash table.

@param file File object @param pageNo Page number in the file @throws HashNotFoundException if the file/page entry is not found in the hash table

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The documentation for this class was generated from the following file:

• bufferHashTable.h