Shared lock, allows multiple readers but only one writer at a time. More...

Inheritance diagram for base::SharedLock:

Public Types
enum	{ UNLOCKED = 0, READ, WRITE, DYNAMIC }
	lock modes, states and priorities More...
Public Member Functions
	SharedLock (size_t priority=DYNAMIC)
	Constructor.
	~SharedLock ()
	Destructor.
void	lock (size_t mode=READ)
	Locks this lock.
void	unlock ()
	Unlocks this lock.
Protected Attributes
size_t	_priority
	priority setting (READ, WRITE or DYNAMIC)
Condition *	_rcond
	reader condition variable
size_t	_reader
	number of readers in case of _state == READ
size_t	_reader_waiting
	number of readers waiting
size_t	_state
	current lock state (UNLOCKED, READ or WRITE)
Condition *	_wcond
	writer condition variable
size_t	_writer_waiting
	number of writers waiting

Detailed Description

Shared lock, allows multiple readers but only one writer at a time.

Member Enumeration Documentation

anonymous enum

lock modes, states and priorities

Enumerator:

UNLOCKED	the lock is unlocked
READ	the lock is owned by readers, a reader wants to lock it, or read priority
WRITE	the lock is owned by writers, a writer wants to lock it, or write priority
DYNAMIC	dynamic priority

base::SharedLock::SharedLock ( size_t priority = DYNAMIC )

Constructor.

Parameters:

priority

The access mode that has priority

void base::SharedLock::lock ( size_t mode = READ )

Locks this lock.

Parameters:

mode

Lock mode, READ or WRITE

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