Lockword Class Reference

Lockword. More...

Public Member Functions
	Lockword (uintptr_t &lockword)
void	init ()
bool	is_thin_lock () const
bool	is_fat_lock () const
bool	is_unlocked () const
	Check if the lockword is an unlocked thin-lock. More...
bool	lock (uintptr_t thinlock)
	Try to lock the lockword with the given thin-lock value. More...
void	unlock ()
	Set the lockword to THIN_UNLOCKED. More...
uintptr_t	get_thin_lock () const
uintptr_t	get_thin_lock_without_count () const
int32_t	get_thin_lock_count () const
int32_t	get_thin_lock_thread_index () const
struct lock_record_t *	get_fat_lock () const
void	set (uintptr_t lockword)
void	set (struct lock_record_t *lr)
bool	is_max_thin_lock_count () const
void	increase_thin_lock_count ()
void	decrease_thin_lock_count ()
void	inflate (struct lock_record_t *lr)
	Inflate the lock of the given object. More...

Static Public Member Functions
static uintptr_t	pre_compute_thinlock (int32_t index)
	Pre-compute the thin lock value for a thread index. More...

Private Attributes
uintptr_t &	_lockword

Static Private Attributes
static const int	THIN_LOCK_WORD_SIZE = SIZEOF_VOID_P * 8
static const int	THIN_LOCK_SHAPE_BIT = 0x01
static const uintptr_t	THIN_UNLOCKED = 0
static const int	THIN_LOCK_COUNT_SHIFT = 1
static const int	THIN_LOCK_COUNT_SIZE = 8
static const int	THIN_LOCK_COUNT_INCR = (1 << THIN_LOCK_COUNT_SHIFT)
static const int	THIN_LOCK_COUNT_MAX = ((1 << THIN_LOCK_COUNT_SIZE) - 1)
static const int	THIN_LOCK_COUNT_MASK = (THIN_LOCK_COUNT_MAX << THIN_LOCK_COUNT_SHIFT)
static const int	THIN_LOCK_TID_SHIFT = (THIN_LOCK_COUNT_SIZE + THIN_LOCK_COUNT_SHIFT)
static const int	THIN_LOCK_TID_SIZE = (THIN_LOCK_WORD_SIZE - THIN_LOCK_TID_SHIFT)

Detailed Description

Lockword.

Definition at line 37 of file lockword.hpp.

Constructor & Destructor Documentation

Lockword::Lockword ( uintptr_t &  lockword )

inline

Definition at line 59 of file lockword.hpp.

Member Function Documentation

void Lockword::decrease_thin_lock_count ( )

inline

Definition at line 207 of file lockword.hpp.

struct lock_record_t * Lockword::get_fat_lock

(

)

const

Definition at line 174 of file lockword.hpp.

uintptr_t Lockword::get_thin_lock ( ) const

inline

Definition at line 150 of file lockword.hpp.

int32_t Lockword::get_thin_lock_count ( ) const

inline

Definition at line 162 of file lockword.hpp.

int32_t Lockword::get_thin_lock_thread_index ( ) const

inline

Definition at line 168 of file lockword.hpp.

uintptr_t Lockword::get_thin_lock_without_count ( ) const

inline

Definition at line 156 of file lockword.hpp.

void Lockword::increase_thin_lock_count ( )

inline

Definition at line 198 of file lockword.hpp.

void Lockword::inflate

(

struct lock_record_t *

lr

)

Inflate the lock of the given object.

This may only be called by the owner of the monitor of the object.

PRE-CONDITION: The current thread must be the owner of this object's monitor AND of the lock record's lock!

Parameters

lr	The lock-record to install. The current thread must own the lock of this lock record!

Definition at line 44 of file lockword.cpp.

void Lockword::init ( )

inline

Definition at line 61 of file lockword.hpp.

bool Lockword::is_fat_lock ( ) const

inline

Definition at line 108 of file lockword.hpp.

bool Lockword::is_max_thin_lock_count ( ) const

inline

Definition at line 192 of file lockword.hpp.

bool Lockword::is_thin_lock ( ) const

inline

Definition at line 102 of file lockword.hpp.

bool Lockword::is_unlocked ( ) const

inline

Check if the lockword is an unlocked thin-lock.

Returns

true if unlocked, false otherwise.

Definition at line 119 of file lockword.hpp.

bool Lockword::lock ( uintptr_t  thinlock )

inline

Try to lock the lockword with the given thin-lock value.

Parameters

thinlock

Thin-lock value to store in the Lockword.

Returns

true if lock was successful, false otherwise.

Definition at line 132 of file lockword.hpp.

uintptr_t Lockword::pre_compute_thinlock ( int32_t  index )

inlinestatic

Pre-compute the thin lock value for a thread index.

Parameters

index

The thead index (>= 1).

Returns

The thin lock value for this thread index.

Definition at line 96 of file lockword.hpp.

void Lockword::set ( uintptr_t  lockword )

inline

Definition at line 180 of file lockword.hpp.

void Lockword::set ( struct lock_record_t *  lr )

inline

Definition at line 186 of file lockword.hpp.

void Lockword::unlock ( )

inline

Set the lockword to THIN_UNLOCKED.

Definition at line 144 of file lockword.hpp.

Field Documentation

uintptr_t& Lockword::_lockword

private

Definition at line 56 of file lockword.hpp.

const int Lockword::THIN_LOCK_COUNT_INCR = (1 << THIN_LOCK_COUNT_SHIFT)

staticprivate

Definition at line 46 of file lockword.hpp.

const int Lockword::THIN_LOCK_COUNT_MASK = (THIN_LOCK_COUNT_MAX << THIN_LOCK_COUNT_SHIFT)

staticprivate

Definition at line 49 of file lockword.hpp.

const int Lockword::THIN_LOCK_COUNT_MAX = ((1 << THIN_LOCK_COUNT_SIZE) - 1)

staticprivate

Definition at line 47 of file lockword.hpp.

const int Lockword::THIN_LOCK_COUNT_SHIFT = 1

staticprivate

Definition at line 44 of file lockword.hpp.

const int Lockword::THIN_LOCK_COUNT_SIZE = 8

staticprivate

Definition at line 45 of file lockword.hpp.

const int Lockword::THIN_LOCK_SHAPE_BIT = 0x01

staticprivate

Definition at line 40 of file lockword.hpp.

const int Lockword::THIN_LOCK_TID_SHIFT = (THIN_LOCK_COUNT_SIZE + THIN_LOCK_COUNT_SHIFT)

staticprivate

Definition at line 51 of file lockword.hpp.

const int Lockword::THIN_LOCK_TID_SIZE = (THIN_LOCK_WORD_SIZE - THIN_LOCK_TID_SHIFT)

staticprivate

Definition at line 52 of file lockword.hpp.

const int Lockword::THIN_LOCK_WORD_SIZE = SIZEOF_VOID_P * 8

staticprivate

Definition at line 39 of file lockword.hpp.

const uintptr_t Lockword::THIN_UNLOCKED = 0

staticprivate

Definition at line 42 of file lockword.hpp.

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

• /home/bbc/buildbot/slave/doxygen-compiler2/source/cacao/src/threads/lockword.hpp
• /home/bbc/buildbot/slave/doxygen-compiler2/source/cacao/src/threads/lockword.cpp