page_size_t Class Reference

Page size descriptor. More...

#include <page0size.h>

Public Member Functions
	page_size_t (uint32_t physical, uint32_t logical, bool is_compressed)
	Constructor from (physical, logical, is_compressed). More...
	page_size_t (uint32_t fsp_flags)
	Constructor from (fsp_flags). More...
size_t	physical () const
	Retrieve the physical page size (on-disk). More...
size_t	logical () const
	Retrieve the logical page size (in-memory). More...
page_no_t	extent_size () const
size_t	extents_per_xdes () const
bool	is_compressed () const
	Check whether the page is compressed on disk. More...
void	copy_from (const page_size_t &src)
	Copy the values from a given page_size_t object. More...
bool	equals_to (const page_size_t &a) const
	Check if a given page_size_t object is equal to the current one. More...
void	set_flag (uint32_t fsp_flags)
page_size_t &	operator= (const page_size_t &)=default
	page_size_t (const page_size_t &)=default

Private Attributes
unsigned	m_physical: PAGE_SIZE_T_SIZE_BITS
	Physical page size. More...
unsigned	m_logical: PAGE_SIZE_T_SIZE_BITS
	Logical page size. More...
unsigned	m_is_compressed: 1
	Flag designating whether the physical page is compressed, which is true IFF the whole tablespace where the page belongs is compressed. More...

Detailed Description

Page size descriptor.

Contains the physical and logical page size, as well as whether the page is compressed or not.

Constructor & Destructor Documentation

page_size_t() [1/3]

page_size_t::page_size_t ( uint32_t  physical, uint32_t  logical, bool  is_compressed  )

inline

Constructor from (physical, logical, is_compressed).

Parameters

[in]	physical	physical (on-disk/zipped) page size
[in]	logical	logical (in-memory/unzipped) page size
[in]	is_compressed	whether the page is compressed

page_size_t() [2/3]

page_size_t::page_size_t ( uint32_t  fsp_flags )

inlineexplicit

Constructor from (fsp_flags).

Parameters

[in]

fsp_flags

filespace flags

page_size_t() [3/3]

page_size_t::page_size_t ( const page_size_t &  )

default

Member Function Documentation

copy_from()

void page_size_t::copy_from ( const page_size_t &  src )

inline

Copy the values from a given page_size_t object.

Parameters

[in]

src

page size object whose values to fetch

equals_to()

bool page_size_t::equals_to ( const page_size_t &  a ) const

inline

Check if a given page_size_t object is equal to the current one.

Parameters

[in]

a

page_size_t object to compare

Returns

true if equal

extent_size()

page_no_t page_size_t::extent_size ( ) const

inline

extents_per_xdes()

size_t page_size_t::extents_per_xdes ( ) const

inline

is_compressed()

bool page_size_t::is_compressed ( ) const

inline

Check whether the page is compressed on disk.

Returns

true if compressed

logical()

size_t page_size_t::logical ( ) const

inline

Retrieve the logical page size (in-memory).

Returns

logical page size in bytes

operator=()

page_size_t & page_size_t::operator= ( const page_size_t &  )

default

physical()

size_t page_size_t::physical ( ) const

inline

Retrieve the physical page size (on-disk).

Returns

physical page size in bytes

set_flag()

void page_size_t::set_flag ( uint32_t  fsp_flags )

inline

Member Data Documentation

m_is_compressed

unsigned page_size_t::m_is_compressed

private

Flag designating whether the physical page is compressed, which is true IFF the whole tablespace where the page belongs is compressed.

m_logical

unsigned page_size_t::m_logical

private

Logical page size.

m_physical

unsigned page_size_t::m_physical

private

Physical page size.

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

• storage/innobase/include/page0size.h