CreateTracker Struct Reference

Track mutex file creation name and line number. More...

Classes
struct	File
	For tracking the filename and line number. More...

Public Member Functions
	CreateTracker () 1
	Constructor. More...
	~CreateTracker () 1
	Destructor. More...
void	register_latch (const void *ptr, const char *filename, uint16_t line) 1
	Register where the latch was created. More...
void	deregister_latch (const void *ptr) 1
	Deregister a latch - when it is destroyed. More...
std::string	get (const void *ptr) 1
	Get the create string, format is "name:line". More...

Private Types
typedef std::map< const void *, File, std::less< const void * >, ut::allocator< std::pair< const void *const, File > > >	Files
	Map the mutex instance to where it was created. More...
typedef OSMutex	Mutex

Private Attributes
Mutex	m_mutex
	Mutex protecting m_files. More...
Files	m_files
	Track the latch creation. More...

Detailed Description

Track mutex file creation name and line number.

This is to avoid storing { const char* name; uint16_t line; } in every instance. This results in the sizeof(Mutex) > 64. We use a lookup table to store it separately. Fetching the values is very rare, only required for diagnostic purposes. And, we don't create/destroy mutexes that frequently.

Member Typedef Documentation

Files

typedef std::map<const void *, File, std::less<const void *>, ut::allocator<std::pair<const void *const, File> > > CreateTracker::Files

private

Map the mutex instance to where it was created.

Mutex

typedef OSMutex CreateTracker::Mutex

private

Constructor & Destructor Documentation

CreateTracker()

CreateTracker::CreateTracker ( )

inline

Constructor.

~CreateTracker()

CreateTracker::~CreateTracker ( )

inline

Destructor.

Member Function Documentation

deregister_latch()

void CreateTracker::deregister_latch ( const void *  ptr )

inline

Deregister a latch - when it is destroyed.

Parameters

[in]

ptr

Latch instance being destroyed

get()

std::string CreateTracker::get ( const void *  ptr )

inline

Get the create string, format is "name:line".

Parameters

[in]

ptr

Latch instance

Returns

the create string or "" if not found

register_latch()

void CreateTracker::register_latch ( const void *  ptr, const char *  filename, uint16_t  line  )

inline

Register where the latch was created.

Parameters

[in]	ptr	Latch instance
[in]	filename	Where created
[in]	line	Line number in filename

Member Data Documentation

m_files

Files CreateTracker::m_files

private

Track the latch creation.

m_mutex

Mutex CreateTracker::m_mutex

private

Mutex protecting m_files.

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

• storage/innobase/sync/sync0debug.cc