Segment Class Reference

File segment of a double write file. More...

Inheritance diagram for Segment:

Public Member Functions
	Segment (dblwr::File &file, page_no_t start, uint32_t n_pages)
	Constructor. More...
	Segment (dblwr::File &file, uint32_t phy_size, page_no_t start, uint32_t n_pages)
	Constructor. More...
virtual	~Segment ()=default
	Destructor. More...
void	write (const void *ptr, uint32_t len) noexcept
	Write to the segment. More...
void	flush () noexcept
	Flush the segment to disk. More...
	Segment (Segment &&)=delete
	Segment (const Segment &)=delete
Segment &	operator= (Segment &&)=delete
Segment &	operator= (const Segment &)=delete

Public Attributes
dblwr::File &	m_file
	File that owns the segment. More...
uint32_t	m_phy_size {}
	Physical page size of each entry/Segment. More...
os_offset_t	m_start {}
	Physical offset in the file for the segment. More...
os_offset_t	m_end {}
	Physical offset up to which this segment is responsible for. More...

Detailed Description

File segment of a double write file.

Constructor & Destructor Documentation

Segment() [1/4]

Segment::Segment ( dblwr::File &  file, page_no_t  start, uint32_t  n_pages  )

inline

Constructor.

Parameters

[in]	file	File that owns the segment.
[in]	start	Offset (page number) of segment in the file.
[in]	n_pages	Number of pages in the segment.

Segment() [2/4]

Segment::Segment ( dblwr::File &  file, uint32_t  phy_size, page_no_t  start, uint32_t  n_pages  )

inline

Constructor.

Parameters

[in]	file	File that owns the segment.
[in]	phy_size	Size of an entry in segment
[in]	start	Offset (page number) of segment in the file.
[in]	n_pages	Number of pages in the segment.

~Segment()

virtual Segment::~Segment ( )

virtualdefault

Destructor.

Segment() [3/4]

Segment::Segment ( Segment &&  )

delete

Segment() [4/4]

Segment::Segment ( const Segment &  )

delete

Member Function Documentation

flush()

void Segment::flush ( )

inlinenoexcept

Flush the segment to disk.

operator=() [1/2]

Segment & Segment::operator= ( const Segment &  )

delete

operator=() [2/2]

Segment & Segment::operator= ( Segment &&  )

delete

write()

void Segment::write ( const void *  ptr, uint32_t  len  )

inlinenoexcept

Write to the segment.

Parameters

[in]	ptr	Start writing from here.
[in]	len	Number of bytes to write.

Member Data Documentation

m_end

os_offset_t Segment::m_end {}

Physical offset up to which this segment is responsible for.

m_file

dblwr::File& Segment::m_file

File that owns the segment.

m_phy_size

uint32_t Segment::m_phy_size {}

Physical page size of each entry/Segment.

m_start

os_offset_t Segment::m_start {}

Physical offset in the file for the segment.

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

• storage/innobase/buf/buf0dblwr.cc