java.util.concurrent.locks

Class AbstractOwnableSynchronizer

java.lang.Object

java.util.concurrent.locks.AbstractOwnableSynchronizer

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

AbstractQueuedLongSynchronizer, AbstractQueuedSynchronizer

public abstract class AbstractOwnableSynchronizer
extends Object
implements Serializable

A synchronizer that may be exclusively owned by a thread. This class provides a basis for creating locks and related synchronizers that may entail a notion of ownership. The AbstractOwnableSynchronizer class itself does not manage or use this information. However, subclasses and tools may use appropriately maintained values to help control and monitor access and provide diagnostics.

Since:

1.6

Author:

Doug Lea

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractOwnableSynchronizer() Empty constructor for use by subclasses.

Method Summary

Modifier and Type	Method and Description
protected Thread	getExclusiveOwnerThread() Returns the thread last set by setExclusiveOwnerThread, or null if never set.
protected void	setExclusiveOwnerThread(Thread t) Sets the thread that currently owns exclusive access.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractOwnableSynchronizer

protected AbstractOwnableSynchronizer()

Empty constructor for use by subclasses.

Method Detail

setExclusiveOwnerThread

protected final void setExclusiveOwnerThread(Thread t)

Sets the thread that currently owns exclusive access. A null argument indicates that no thread owns access. This method does not otherwise impose any synchronization or volatile field accesses.

getExclusiveOwnerThread

protected final Thread getExclusiveOwnerThread()

Returns the thread last set by setExclusiveOwnerThread, or null if never set. This method does not otherwise impose any synchronization or volatile field accesses.

Returns:

the owner thread