undo::Tablespaces Class Reference

List of undo tablespaces, each containing a list of rollback segments. More...

#include <trx0purge.h>

Public Member Functions
	Tablespaces ()
	~Tablespaces ()
void	init ()
	Initialize. More...
void	deinit ()
	De-initialize. More...
void	clear ()
	Clear the contents of the list of Tablespace objects. More...
ulint	size ()
	Get the number of tablespaces tracked by this object. More...
bool	empty ()
	See if the list of tablespaces is empty. More...
Tablespace *	at (size_t pos)
	Get the Tablespace tracked at a position. More...
void	add (Tablespace &ref_undo_space)
	Add a new undo::Tablespace to the back of the vector. More...
void	drop (Tablespace *undo_space)
	Drop an existing explicit undo::Tablespace. More...
void	drop (Tablespace &ref_undo_space)
	Drop an existing explicit undo::Tablespace. More...
bool	contains (space_id_t num)
	Check if the given space_id is in the vector. More...
Tablespace *	find (space_id_t num)
	Find the given space_num in the vector. More...
Tablespace *	find_first_inactive_explicit (size_t *num_active)
	Find the first undo space that is marked inactive explicitly. More...
bool	own_latch ()
	Determine if this thread owns a lock on m_latch. More...
void	s_lock ()
	Get a shared lock on m_spaces. More...
void	s_unlock ()
	Release a shared lock on m_spaces. More...
void	x_lock ()
	Get an exclusive lock on m_spaces. More...
void	x_unlock ()
	Release an exclusive lock on m_spaces. More...

Public Attributes
Tablespaces_Vector	m_spaces

Private Types
using	Tablespaces_Vector = std::vector< Tablespace *, ut::allocator< Tablespace * > >

Private Attributes
rw_lock_t *	m_latch
	RW lock to protect m_spaces. More...

Detailed Description

List of undo tablespaces, each containing a list of rollback segments.

Member Typedef Documentation

Tablespaces_Vector

using undo::Tablespaces::Tablespaces_Vector = std::vector<Tablespace *, ut::allocator<Tablespace *> >

private

Constructor & Destructor Documentation

Tablespaces()

undo::Tablespaces::Tablespaces ( )

inline

~Tablespaces()

undo::Tablespaces::~Tablespaces ( )

inline

Member Function Documentation

add()

void undo::Tablespaces::add

(

Tablespace &

ref_undo_space

)

Add a new undo::Tablespace to the back of the vector.

Add a new space_id to the back of the vector.

The vector has been pre-allocated to 128 so read threads will not loose what is pointed to. If tablespace_name and file_name are standard names, they are optional.

Parameters

[in]

ref_undo_space

undo tablespace

at()

Tablespace * undo::Tablespaces::at ( size_t  pos )

inline

Get the Tablespace tracked at a position.

clear()

void undo::Tablespaces::clear ( )

inline

Clear the contents of the list of Tablespace objects.

This does not deallocate any memory.

contains()

bool undo::Tablespaces::contains ( space_id_t  num )

inline

Check if the given space_id is in the vector.

Parameters

[in]

num

undo tablespace number

Returns

true if space_id is found, else false

deinit()

void undo::Tablespaces::deinit

(

void

)

De-initialize.

De-initialize the undo::Tablespaces object.

drop() [1/2]

void undo::Tablespaces::drop

(

Tablespace &

ref_undo_space

)

Drop an existing explicit undo::Tablespace.

Parameters

[in]

ref_undo_space

reference to undo space

drop() [2/2]

void undo::Tablespaces::drop

(

Tablespace *

undo_space

)

Drop an existing explicit undo::Tablespace.

Parameters

[in]

undo_space

pointer to undo space

empty()

bool undo::Tablespaces::empty ( )

inline

See if the list of tablespaces is empty.

find()

Tablespace * undo::Tablespaces::find ( space_id_t  num )

inline

Find the given space_num in the vector.

Parameters

[in]

num

undo tablespace number

Returns

pointer to an undo::Tablespace struct

find_first_inactive_explicit()

Tablespace * undo::Tablespaces::find_first_inactive_explicit ( size_t *  num_active )

inline

Find the first undo space that is marked inactive explicitly.

Parameters

[in,out]

num_active

If there are no inactive_explicit spaces found, this will contain the number of active spaces found.

Returns

pointer to an undo::Tablespace struct

init()

void undo::Tablespaces::init

(

void

)

Initialize.

Initialize the undo::Tablespaces object.

Fix the size of the vector so that it will not do allocations for inserts. This way the contents can be read without using a latch.

own_latch()

bool undo::Tablespaces::own_latch ( )

inline

Determine if this thread owns a lock on m_latch.

s_lock()

void undo::Tablespaces::s_lock ( )

inline

Get a shared lock on m_spaces.

s_unlock()

void undo::Tablespaces::s_unlock ( )

inline

Release a shared lock on m_spaces.

size()

ulint undo::Tablespaces::size ( )

inline

Get the number of tablespaces tracked by this object.

x_lock()

void undo::Tablespaces::x_lock ( )

inline

Get an exclusive lock on m_spaces.

x_unlock()

void undo::Tablespaces::x_unlock ( )

inline

Release an exclusive lock on m_spaces.

Member Data Documentation

m_latch

rw_lock_t* undo::Tablespaces::m_latch

private

RW lock to protect m_spaces.

x for adding elements, s for scanning, size() etc.

m_spaces

Tablespaces_Vector undo::Tablespaces::m_spaces

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

• storage/innobase/include/trx0purge.h
• storage/innobase/trx/trx0purge.cc