taco::PageHeaderData Class Reference

PageHeaderData defines the header of every virtual file data page. More...

#include <storage/FileManager.h>

Public Member Functions
constexpr bool	IsAllocated () const
constexpr bool	IsMetaPage () const
constexpr bool	IsVFilePage () const
constexpr bool	IsFMMetaPage () const
constexpr bool	IsVFileMetaPage () const
constexpr bool	IsVFileDataPage () const
PageNumber	GetNextPageNumber () const
	Returns the next page number. More...
PageNumber	GetPrevPageNumber () const
	Returns the previous page number. More...
constexpr FileId	GetFileId () const

Private Attributes
uint16_t	m_flags
uint16_t	m_reserved
FileId	m_fid
atomic< PageNumber >	m_prev_pid
atomic< PageNumber >	m_next_pid

Static Private Attributes
static constexpr uint16_t	FLAG_META_PAGE = 0x1
static constexpr uint16_t	FLAG_VFILE_PAGE = 0x2

Friends
class	FileManager
class	File

Detailed Description

PageHeaderData defines the header of every virtual file data page.

Any class other than the FileManager shall NEVER modify the PageHeaderData but may inspect its content using the member functions.

Impl. note: currently sizeof(PageHeaderData) == 16, but do not assume that any place other than the FileManager.

Member Function Documentation

GetFileId()

constexpr FileId taco::PageHeaderData::GetFileId ( ) const

inlineconstexpr

GetNextPageNumber()

PageNumber taco::PageHeaderData::GetNextPageNumber ( ) const

inline

Returns the next page number.

You may ignore any concurrency control related description.

GetPrevPageNumber()

PageNumber taco::PageHeaderData::GetPrevPageNumber ( ) const

inline

Returns the previous page number.

You may ignore any concurrency control related description.

IsAllocated()

constexpr bool taco::PageHeaderData::IsAllocated ( ) const

inlineconstexpr

IsFMMetaPage()

constexpr bool taco::PageHeaderData::IsFMMetaPage ( ) const

inlineconstexpr

IsMetaPage()

constexpr bool taco::PageHeaderData::IsMetaPage ( ) const

inlineconstexpr

IsVFileDataPage()

constexpr bool taco::PageHeaderData::IsVFileDataPage ( ) const

inlineconstexpr

IsVFileMetaPage()

constexpr bool taco::PageHeaderData::IsVFileMetaPage ( ) const

inlineconstexpr

IsVFilePage()

constexpr bool taco::PageHeaderData::IsVFilePage ( ) const

inlineconstexpr

Friends And Related Function Documentation

File

friend class File

friend

FileManager

friend class FileManager

friend

Member Data Documentation

FLAG_META_PAGE

constexpr uint16_t taco::PageHeaderData::FLAG_META_PAGE = 0x1

staticconstexprprivate

FLAG_VFILE_PAGE

constexpr uint16_t taco::PageHeaderData::FLAG_VFILE_PAGE = 0x2

staticconstexprprivate

m_fid

FileId taco::PageHeaderData::m_fid

private

m_flags

uint16_t taco::PageHeaderData::m_flags

private

m_next_pid

atomic<PageNumber> taco::PageHeaderData::m_next_pid

private

m_prev_pid

atomic<PageNumber> taco::PageHeaderData::m_prev_pid

private

m_reserved

uint16_t taco::PageHeaderData::m_reserved

private

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

• storage/FileManager.h