Table_cache_manager Class Reference

Container class for all table cache instances in the system. More...

#include <table_cache.h>

Public Member Functions
bool	init ()
	Initialize all instances of table cache to be used by server. More...
void	destroy ()
	Destroy all instances of table cache which were used by server. More...
Table_cache *	get_cache (THD *thd)
	Get instance of table cache to be used by particular connection. More...
uint	cache_index (Table_cache *cache) const
	Get index for the table cache in container. More...
uint	cached_tables ()
	Get total number of used and unused TABLE objects in all table caches. More...
void	lock_all_and_tdc ()
	Acquire locks on all instances of table cache and table definition cache (i.e. More...
void	unlock_all_and_tdc ()
	Release locks on all instances of table cache and table definition cache. More...
void	assert_owner (THD *thd)
	Assert that caller owns lock on the table cache. More...
void	assert_owner_all ()
	Assert that caller owns locks on all instances of table cache. More...
void	assert_owner_all_and_tdc ()
	Assert that caller owns locks on all instances of table cache and table definition cache. More...
void	free_table (THD *thd, enum_tdc_remove_table_type remove_type, TABLE_SHARE *share)
	Remove and free all or some (depending on parameter) TABLE objects for the table from all table cache instances. More...
void	free_all_unused_tables ()
	Free all unused TABLE objects in all table cache instances. More...
void	print_tables ()
	Print debug information for the contents of all table cache instances. More...

Static Public Attributes
static const int	MAX_TABLE_CACHES = 64
	Maximum supported number of table cache instances. More...
static const int	DEFAULT_MAX_TABLE_CACHES = 16
	Default number of table cache instances. More...

Private Attributes
Table_cache	m_table_cache [MAX_TABLE_CACHES]
	An array of Table_cache instances. More...

Friends
class	Table_cache_iterator

Detailed Description

Container class for all table cache instances in the system.

Member Function Documentation

assert_owner()

void Table_cache_manager::assert_owner

(

THD *

thd

)

Assert that caller owns lock on the table cache.

Parameters

thd	Thread handle

assert_owner_all()

void Table_cache_manager::assert_owner_all

(

)

Assert that caller owns locks on all instances of table cache.

assert_owner_all_and_tdc()

void Table_cache_manager::assert_owner_all_and_tdc

(

)

Assert that caller owns locks on all instances of table cache and table definition cache.

cache_index()

uint Table_cache_manager::cache_index ( Table_cache *  cache ) const

inline

Get index for the table cache in container.

cached_tables()

uint Table_cache_manager::cached_tables

(

)

Get total number of used and unused TABLE objects in all table caches.

Note

Doesn't require acquisition of table cache locks if inexact number of tables is acceptable.

destroy()

void Table_cache_manager::destroy

(

)

Destroy all instances of table cache which were used by server.

free_all_unused_tables()

void Table_cache_manager::free_all_unused_tables

(

)

Free all unused TABLE objects in all table cache instances.

free_table()

void Table_cache_manager::free_table	(	THD *	thd,
		enum_tdc_remove_table_type	remove_type,
		TABLE_SHARE *	share
	)

Remove and free all or some (depending on parameter) TABLE objects for the table from all table cache instances.

Parameters

thd	Thread context
remove_type	Type of removal.

See also

tdc_remove_table().

Parameters

share

TABLE_SHARE for the table to be removed.

Note

Caller should own LOCK_open and locks on all table cache instances.

get_cache()

Table_cache * Table_cache_manager::get_cache ( THD *  thd )

inline

Get instance of table cache to be used by particular connection.

init()

bool Table_cache_manager::init

(

void

)

Initialize all instances of table cache to be used by server.

Return values

false	- success.
true	- failure.

lock_all_and_tdc()

void Table_cache_manager::lock_all_and_tdc

(

)

Acquire locks on all instances of table cache and table definition cache (i.e.

LOCK_open).

print_tables()

void Table_cache_manager::print_tables

(

)

Print debug information for the contents of all table cache instances.

unlock_all_and_tdc()

void Table_cache_manager::unlock_all_and_tdc

(

)

Release locks on all instances of table cache and table definition cache.

Friends And Related Function Documentation

Table_cache_iterator

friend class Table_cache_iterator

friend

Member Data Documentation

DEFAULT_MAX_TABLE_CACHES

const int Table_cache_manager::DEFAULT_MAX_TABLE_CACHES = 16

static

Default number of table cache instances.

m_table_cache

Table_cache Table_cache_manager::m_table_cache[MAX_TABLE_CACHES]

private

An array of Table_cache instances.

Only the first table_cache_instances elements in it are used.

MAX_TABLE_CACHES

const int Table_cache_manager::MAX_TABLE_CACHES = 64

static

Maximum supported number of table cache instances.

---

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

• sql/table_cache.h
• sql/table_cache.cc