tbb::spin_rw_mutex_v3 Class Reference

Fast, unfair, spinning reader-writer lock with backoff and writer-preference. More...

#include <spin_rw_mutex.h>

Classes
class	scoped_lock
	The scoped locking pattern. More...

Public Member Functions
	spin_rw_mutex_v3 ()
	Construct unacquired mutex.
	~spin_rw_mutex_v3 ()
	Destructor asserts if the mutex is acquired, i.e. state is zero.
void	lock ()
	Acquire writer lock.
bool	try_lock ()
	Try acquiring writer lock (non-blocking) More...
void	unlock ()
	Release lock.
void	lock_read ()
	Acquire reader lock.
bool	try_lock_read ()
	Try acquiring reader lock (non-blocking) More...

Static Public Attributes
static const bool	is_rw_mutex = true
static const bool	is_recursive_mutex = false
static const bool	is_fair_mutex = false

Protected Types
typedef intptr_t	state_t

Protected Attributes
state_t	state
	State of lock. More...

Static Protected Attributes
static const state_t	WRITER = 1
static const state_t	WRITER_PENDING = 2
static const state_t	READERS = ~(WRITER | WRITER_PENDING)
static const state_t	ONE_READER = 4
static const state_t	BUSY = WRITER | READERS

Detailed Description

Fast, unfair, spinning reader-writer lock with backoff and writer-preference.

Member Function Documentation

bool tbb::spin_rw_mutex_v3::try_lock ( )

inline

Try acquiring writer lock (non-blocking)

Return true if lock acquired; false otherwise.

bool tbb::spin_rw_mutex_v3::try_lock_read ( )

inline

Try acquiring reader lock (non-blocking)

Return true if reader lock acquired; false otherwise.

Member Data Documentation

state_t tbb::spin_rw_mutex_v3::state

protected

State of lock.

Bit 0 = writer is holding lock Bit 1 = request by a writer to acquire lock (hint to readers to wait) Bit 2..N = number of readers holding lock

Referenced by tbb::spin_rw_mutex_v3::scoped_lock::release(), and unlock().

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

• spin_rw_mutex.h