Reduced_batch_deserializer Class Reference

Reduced doublewrite file deserializer. More...

Public Member Functions
	Reduced_batch_deserializer (Buffer *buf, uint32_t n_pages)
	Constructor. More...
template<typename F >
dberr_t	deserialize (F &f)
	Deserialize page and call Functor f for each page_entry found from reduced dblwr page. More...

Private Member Functions
dberr_t	parse_header (const byte *page, uint16_t *data_len) noexcept
	Parse reduced dblwr batch page header. More...
template<typename F >
dberr_t	parse_page (const byte *page, F &f) noexcept
template<typename F >
void	parse_page_data (const byte *page, uint16_t data_len, F &f) noexcept
	Utility function to parse page data. More...
bool	is_zeroes (const byte *page)

Private Attributes
Buffer *	m_buf
	Temporary buffer to hold Reduced dblwr pages. More...
uint32_t	m_n_pages
	Number of reduced dblwr pages. More...

Detailed Description

Reduced doublewrite file deserializer.

Used during crash recovery.

Constructor & Destructor Documentation

Reduced_batch_deserializer()

Reduced_batch_deserializer::Reduced_batch_deserializer ( Buffer *  buf, uint32_t  n_pages  )

inlineexplicit

Constructor.

Parameters

[in]	buf	Buffer to hold the Reduced dblwr pages
[in]	n_pages	Number of reduced dblwr pages

Member Function Documentation

deserialize()

template<typename F >

dberr_t Reduced_batch_deserializer::deserialize ( F &  f )

inline

Deserialize page and call Functor f for each page_entry found from reduced dblwr page.

Parameters

[in]

f

Functor to process page entry from dblwr page

Returns

DB_SUCCESS on success, others of checksum or parsing failures

is_zeroes()

bool Reduced_batch_deserializer::is_zeroes ( const byte *  page )

inlineprivate

Returns

true if dblwr page is an all-zero page

Parameters

[in]

page

dblwr page in batch file (.bdblwr)

parse_header()

dberr_t Reduced_batch_deserializer::parse_header ( const byte *  page, uint16_t *  data_len  )

inlineprivatenoexcept

Parse reduced dblwr batch page header.

Parameters

[in]	page	Page to parse
[in]	data_len	length of data in page

Returns

DB_SUCCESS on success, others on failure

parse_page()

template<typename F >

dberr_t Reduced_batch_deserializer::parse_page ( const byte *  page, F &  f  )

inlineprivatenoexcept

parse_page_data()

template<typename F >

void Reduced_batch_deserializer::parse_page_data ( const byte *  page, uint16_t  data_len, F &  f  )

inlineprivatenoexcept

Utility function to parse page data.

Parameters

[in]	page	reduced dblwr batch page
[in]	data_len	length of data in page
[in]	f	Callback function that process page entries

Member Data Documentation

m_buf

Buffer* Reduced_batch_deserializer::m_buf

private

Temporary buffer to hold Reduced dblwr pages.

m_n_pages

uint32_t Reduced_batch_deserializer::m_n_pages

private

Number of reduced dblwr pages.

---

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

• storage/innobase/buf/buf0dblwr.cc