Java in a Nutshell, 5th Edition [Electronic resources] نسخه متنی

This abstract
class is a low-level utility. A concrete subclass can be used as a
helper class for implementing the Lock interface
or for implementing synchronizer utilities like the
CountDownLatch class of
java.util.concurrent. Subclasses must define
tryAcquire( ), TRyRelease( ),
tryAcquireShared( ), tryReleaseShared(
), and isHeldExclusively.

Figure 16-104. java.util.concurrent.locks.AbstractQueuedSynchronizer

public abstract class

AbstractQueuedSynchronizer implements Serializable {
// Protected Constructors
protected

AbstractQueuedSynchronizer ( );
// Nested Types
public class

ConditionObject implements Condition, Serializable;
// Public Instance Methods
public final void

acquire (int

arg );
public final void

acquireInterruptibly (int

arg ) throws InterruptedException;
public final void

acquireShared (int

arg );
public final void

acquireSharedInterruptibly (int

arg ) throws InterruptedException;
public final java.util.Collection<Thread>

getExclusiveQueuedThreads ( );
public final Thread

getFirstQueuedThread ( );
public final java.util.Collection<Thread>

getQueuedThreads ( );
public final int

getQueueLength ( );
public final java.util.Collection<Thread>

getSharedQueuedThreads ( );
public final java.util.Collection<Thread>

getWaitingThreads (AbstractQueuedSynchronizer.
ConditionObject

condition );
public final int

getWaitQueueLength (AbstractQueuedSynchronizer.ConditionObject

condition );
public final boolean

hasContended ( );
public final boolean

hasQueuedThreads ( );
public final boolean

hasWaiters (AbstractQueuedSynchronizer.ConditionObject

condition );
public final boolean

isQueued (Thread

thread );
public final boolean

owns (AbstractQueuedSynchronizer.ConditionObject

condition );
public final boolean

release (int

arg );
public final boolean

releaseShared (int

arg );
public final boolean

tryAcquireNanos (int

arg , long

nanosTimeout )
throws InterruptedException;
public final boolean

tryAcquireSharedNanos (int

arg , long

nanosTimeout )
throws InterruptedException;
// Public Methods Overriding Object
public String

toString ( );
// Protected Instance Methods
protected final boolean

compareAndSetState (int

expect , int

update );
protected final int

getState ( );
protected boolean

isHeldExclusively ( );
protected final void

setState (int

newState );
protected boolean

tryAcquire (int

arg );
protected int

tryAcquireShared (int

arg );
protected boolean

tryRelease (int

arg );
protected boolean

tryReleaseShared (int

arg );
}