Special purpose iterators to be used when scanning the LRU list. More...

#include <buf0buf.h>

Inheritance diagram for LRUItr:

Public Member Functions
	LRUItr (const buf_pool_t buf_pool, const ib_mutex_t mutex)
	Constructor. More...

	~LRUItr () override=default
	Destructor. More...

buf_page_t *	start ()
	Selects from where to start a scan. More...

Public Member Functions inherited from LRUHp
	LRUHp (const buf_pool_t buf_pool, const ib_mutex_t mutex)
	Constructor. More...

	~LRUHp () override=default
	Destructor. More...

void	adjust (const buf_page_t *bpage) override
	Adjust the value of hp. More...

Public Member Functions inherited from HazardPointer
	HazardPointer (const buf_pool_t buf_pool, const ib_mutex_t mutex)
	Constructor. More...

virtual	~HazardPointer ()=default
	Destructor. More...

buf_page_t *	get () const
	Get current value. More...

void	set (buf_page_t *bpage)
	Set current value. More...

bool	is_hp (const buf_page_t *bpage)
	Checks if a bpage is the hp. More...

void	move (const buf_page_t bpage, buf_page_t dpage)
	Adjust the value of hp for moving. More...

Additional Inherited Members
Protected Member Functions inherited from HazardPointer
	HazardPointer (const HazardPointer &)
	Disable copying. More...

HazardPointer &	operator= (const HazardPointer &)

Protected Attributes inherited from HazardPointer
const buf_pool_t *	m_buf_pool
	Buffer pool instance. More...

const ib_mutex_t *	m_mutex
	mutex that protects access to the m_hp. More...

buf_page_t *	m_hp
	hazard pointer. More...

Detailed Description

Special purpose iterators to be used when scanning the LRU list.

The idea is that when one thread finishes the scan it leaves the itr in that position and the other thread can start scan from there

Constructor & Destructor Documentation

inline

Constructor.

Parameters

buf_pool	buffer pool instance
mutex	mutex that is protecting the hp.

LRUItr::~LRUItr ( )

overridedefault

Destructor.

buf_page_t * LRUItr::start ( )

Selects from where to start a scan.

If we have scanned too deep into the LRU list it resets the value to the tail of the LRU list.

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