A RAII wrapper class which combines Global_shared_latch_guard and Shard_naked_latch_guard to s-latch the global lock_sys latch and latch the mutex protecting the specified shard for the duration of its scope. More...

#include <lock0guards.h>

Public Member Functions
	Shard_latch_guard (ut::Location location, const dict_table_t &table)

	Shard_latch_guard (ut::Location location, const page_id_t &page_id)

Private Attributes
Global_shared_latch_guard	m_global_shared_latch_guard

Shard_naked_latch_guard	m_shard_naked_latch_guard

Detailed Description

A RAII wrapper class which combines Global_shared_latch_guard and Shard_naked_latch_guard to s-latch the global lock_sys latch and latch the mutex protecting the specified shard for the duration of its scope.

The order of initialization is important: we have to take shared global latch BEFORE we attempt to use hash function to compute correct shard and latch it.

Constructor & Destructor Documentation

◆ Shard_latch_guard() [1/2]

locksys::Shard_latch_guard::Shard_latch_guard	(	ut::Location	location,
		const dict_table_t &	table
	)

inlineexplicit

◆ Shard_latch_guard() [2/2]

locksys::Shard_latch_guard::Shard_latch_guard	(	ut::Location	location,
		const page_id_t &	page_id
	)

inlineexplicit

Member Data Documentation

◆ m_global_shared_latch_guard

Global_shared_latch_guard locksys::Shard_latch_guard::m_global_shared_latch_guard

private

◆ m_shard_naked_latch_guard

Shard_naked_latch_guard locksys::Shard_latch_guard::m_shard_naked_latch_guard