latch_t Struct Reference

All (ordered) latches, used in debugging, must derive from this class. More...

#include <sync0types.h>

Inheritance diagram for latch_t:

Public Member Functions
	latch_t (latch_id_t id=LATCH_ID_NONE) 1
	Constructor. More...
latch_t &	operator= (const latch_t &)=default
virtual	~latch_t () 1=default
	Destructor. More...
latch_id_t	get_id () const
bool	is_rw_lock () const 1
virtual std::string	to_string () const =0
	Print the latch context. More...
virtual std::string	locked_from () const =0
latch_level_t	get_level () const 1
bool	is_temp_fsp () const 1
void	set_temp_fsp () 1
	Set the temporary tablespace flag. More...
const char *	get_name () const 1

Public Attributes
latch_id_t	m_id
	Latch ID. More...
bool	m_rw_lock
	true if it is a rw-lock. More...
bool	m_temp_fsp
	true if it is an temporary space latch More...

Detailed Description

All (ordered) latches, used in debugging, must derive from this class.

Constructor & Destructor Documentation

latch_t()

latch_t::latch_t ( latch_id_t  id = LATCH_ID_NONE )

inlineexplicit

Constructor.

Parameters

[in]

id

The latch ID

~latch_t()

virtual latch_t::~latch_t ( )

virtualdefault

Destructor.

Member Function Documentation

get_id()

latch_id_t latch_t::get_id ( ) const

inline

Returns

the latch ID

get_level()

latch_level_t latch_t::get_level ( ) const

inline

Returns

the latch level

get_name()

const char * latch_t::get_name ( ) const

inline

Returns

the latch name, m_id must be set

is_rw_lock()

bool latch_t::is_rw_lock ( ) const

inline

Returns

true if it is a rw-lock

is_temp_fsp()

bool latch_t::is_temp_fsp ( ) const

inline

Returns

true if the latch is for a temporary file space

locked_from()

virtual std::string latch_t::locked_from ( ) const

pure virtual

Returns

"filename:line" from where the latch was last locked

Implemented in MutexDebug< Mutex >::Context, and rw_lock_t.

operator=()

latch_t & latch_t::operator= ( const latch_t &  )

default

set_temp_fsp()

void latch_t::set_temp_fsp ( )

inline

Set the temporary tablespace flag.

The latch order constraints are different for intrinsic tables. We don't always acquire the index->lock. We need to figure out the context and add some special rules during the checks.

to_string()

virtual std::string latch_t::to_string ( ) const

pure virtual

Print the latch context.

Returns

the string representation

Implemented in rw_lock_t, and MutexDebug< Mutex >::Context.

Member Data Documentation

m_id

latch_id_t latch_t::m_id

Latch ID.

m_rw_lock

bool latch_t::m_rw_lock

true if it is a rw-lock.

In debug mode, rw_lock_t derives from this class and sets this variable.

m_temp_fsp

bool latch_t::m_temp_fsp

true if it is an temporary space latch

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The documentation for this struct was generated from the following file:

• storage/innobase/include/sync0types.h