Descriptor Constants (moved from fsp0fsp.c)

Macros
#define	XDES_SIZE    (XDES_BITMAP + UT_BITS_IN_BYTES(FSP_EXTENT_SIZE * XDES_BITS_PER_PAGE))
	File extent data structure size in bytes. More...
#define	XDES_SIZE_MAX    (XDES_BITMAP + UT_BITS_IN_BYTES(FSP_EXTENT_SIZE_MAX * XDES_BITS_PER_PAGE))
	File extent data structure size in bytes for MAX page size. More...
#define	XDES_SIZE_MIN    (XDES_BITMAP + UT_BITS_IN_BYTES(FSP_EXTENT_SIZE_MIN * XDES_BITS_PER_PAGE))
	File extent data structure size in bytes for MIN page size. More...

Enumerations
enum	xdes_state_t {   XDES_NOT_INITED = 0 , XDES_FREE = 1 , XDES_FREE_FRAG = 2 , XDES_FULL_FRAG = 3 ,   XDES_FSEG = 4 , XDES_FSEG_FRAG = 5 }
	States of a descriptor. More...

Variables
constexpr uint32_t	XDES_ID = 0
	The identifier of the segment to which this extent belongs. More...
constexpr uint32_t	XDES_FLST_NODE = 8
	The list node data structure for the descriptors. More...
constexpr uint32_t	XDES_STATE = FLST_NODE_SIZE + 8
	contains state information of the extent More...
constexpr uint32_t	XDES_BITMAP = FLST_NODE_SIZE + 12
	Descriptor bitmap of the pages in the extent. More...
constexpr uint32_t	XDES_BITS_PER_PAGE = 2
	How many bits are there per page. More...
constexpr uint32_t	XDES_FREE_BIT = 0
	Index of the bit which tells if the page is free. More...
constexpr uint32_t	XDES_CLEAN_BIT = 1
	NOTE: currently not used! Index of the bit which tells if there are old versions of tuples on the page. More...
constexpr uint32_t	XDES_ARR_OFFSET = FSP_HEADER_OFFSET + FSP_HEADER_SIZE
	Offset of the descriptor array on a descriptor page. More...
const ulint	XDES_FRAG_N_USED = 2
	The number of reserved pages in a fragment extent. More...

Detailed Description

Macro Definition Documentation

XDES_SIZE

#define XDES_SIZE    (XDES_BITMAP + UT_BITS_IN_BYTES(FSP_EXTENT_SIZE * XDES_BITS_PER_PAGE))

File extent data structure size in bytes.

XDES_SIZE_MAX

#define XDES_SIZE_MAX    (XDES_BITMAP + UT_BITS_IN_BYTES(FSP_EXTENT_SIZE_MAX * XDES_BITS_PER_PAGE))

File extent data structure size in bytes for MAX page size.

XDES_SIZE_MIN

#define XDES_SIZE_MIN    (XDES_BITMAP + UT_BITS_IN_BYTES(FSP_EXTENT_SIZE_MIN * XDES_BITS_PER_PAGE))

File extent data structure size in bytes for MIN page size.

Enumeration Type Documentation

xdes_state_t

enum xdes_state_t

States of a descriptor.

Enumerator
XDES_NOT_INITED	extent descriptor is not initialized
XDES_FREE	extent is in free list of space
XDES_FREE_FRAG	extent is in free fragment list of space
XDES_FULL_FRAG	extent is in full fragment list of space
XDES_FSEG	extent belongs to a segment
XDES_FSEG_FRAG	fragment extent leased to segment

Variable Documentation

XDES_ARR_OFFSET

constexpr uint32_t XDES_ARR_OFFSET = FSP_HEADER_OFFSET + FSP_HEADER_SIZE

constexpr

Offset of the descriptor array on a descriptor page.

XDES_BITMAP

constexpr uint32_t XDES_BITMAP = FLST_NODE_SIZE + 12

constexpr

Descriptor bitmap of the pages in the extent.

XDES_BITS_PER_PAGE

constexpr uint32_t XDES_BITS_PER_PAGE = 2

constexpr

How many bits are there per page.

XDES_CLEAN_BIT

constexpr uint32_t XDES_CLEAN_BIT = 1

constexpr

NOTE: currently not used! Index of the bit which tells if there are old versions of tuples on the page.

XDES_FLST_NODE

constexpr uint32_t XDES_FLST_NODE = 8

constexpr

The list node data structure for the descriptors.

XDES_FRAG_N_USED

const ulint XDES_FRAG_N_USED = 2

The number of reserved pages in a fragment extent.

XDES_FREE_BIT

constexpr uint32_t XDES_FREE_BIT = 0

constexpr

Index of the bit which tells if the page is free.

XDES_ID

constexpr uint32_t XDES_ID = 0

constexpr

The identifier of the segment to which this extent belongs.

XDES_STATE

constexpr uint32_t XDES_STATE = FLST_NODE_SIZE + 8

constexpr

contains state information of the extent