locksys::Latches::Table_shards Class Reference

Public Member Functions
	Table_shards ()
	~Table_shards ()
Lock_mutex &	get_mutex (const table_id_t table_id)
	Returns the mutex which (together with the global latch) protects the table shard which contains table locks for the given table. More...
const Lock_mutex &	get_mutex (const table_id_t table_id) const
	Returns the mutex which (together with the global latch) protects the table shard which contains table locks for the given table. More...
const Lock_mutex &	get_mutex (const dict_table_t &table) const
	Returns the mutex which (together with the global latch) protects the table shard which contains table locks for the given table. More...

Static Private Member Functions
static size_t	get_shard (const table_id_t table_id)
	Identifies the table shard which contains locks for the given table. More...

Private Attributes
Padded_mutex	mutexes [SHARDS_COUNT]
	Each shard is protected by a separate mutex. More...

Constructor & Destructor Documentation

Table_shards()

locksys::Latches::Table_shards::Table_shards

(

)

~Table_shards()

locksys::Latches::Table_shards::~Table_shards

(

)

Member Function Documentation

get_mutex() [1/3]

const Lock_mutex & locksys::Latches::Table_shards::get_mutex

(

const dict_table_t &

table

)

const

Returns the mutex which (together with the global latch) protects the table shard which contains table locks for the given table.

Parameters

[in]

table

The table

Returns

The mutex responsible for the shard containing the table

get_mutex() [2/3]

Lock_mutex & locksys::Latches::Table_shards::get_mutex

(

const table_id_t

table_id

)

Returns the mutex which (together with the global latch) protects the table shard which contains table locks for the given table.

Parameters

[in]

table_id

The id of the table

Returns

The mutex responsible for the shard containing the table

get_mutex() [3/3]

const Lock_mutex & locksys::Latches::Table_shards::get_mutex

(

const table_id_t

table_id

)

const

Returns the mutex which (together with the global latch) protects the table shard which contains table locks for the given table.

Parameters

[in]

table_id

The id of the table

Returns

The mutex responsible for the shard containing the table

get_shard()

size_t locksys::Latches::Table_shards::get_shard ( const table_id_t  table_id )

staticprivate

Identifies the table shard which contains locks for the given table.

Parameters

[in]

table_id

The id of the table

Returns

Integer in the range [0..lock_sys_t::SHARDS_COUNT)

Member Data Documentation

mutexes

Padded_mutex locksys::Latches::Table_shards::mutexes[SHARDS_COUNT]

private

Each shard is protected by a separate mutex.

Mutexes are padded to avoid false sharing issues with cache.

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

• storage/innobase/include/lock0latches.h
• storage/innobase/lock/lock0latches.cc