com.google.common.util.concurrent

Class AbstractFuture.SynchronizedHelper

java.lang.Object

com.google.common.util.concurrent.AbstractFuture.AtomicHelper

com.google.common.util.concurrent.AbstractFuture.SynchronizedHelper

Enclosing class:

AbstractFuture<V>

private static final class AbstractFuture.SynchronizedHelper
extends AbstractFuture.AtomicHelper

AbstractFuture.AtomicHelper based on synchronized and volatile writes.

This is an implementation of last resort for when certain basic VM features are broken (like AtomicReferenceFieldUpdater).

Constructor Summary

Constructors

Modifier	Constructor and Description
private	SynchronizedHelper()

Method Summary

Modifier and Type	Method and Description
(package private) boolean	casListeners(AbstractFuture<?> future, AbstractFuture.Listener expect, AbstractFuture.Listener update) Performs a CAS operation on the AbstractFuture.listeners field.
(package private) boolean	casValue(AbstractFuture<?> future, java.lang.Object expect, java.lang.Object update) Performs a CAS operation on the AbstractFuture.value field.
(package private) boolean	casWaiters(AbstractFuture<?> future, AbstractFuture.Waiter expect, AbstractFuture.Waiter update) Performs a CAS operation on the AbstractFuture.waiters field.
(package private) void	putNext(AbstractFuture.Waiter waiter, AbstractFuture.Waiter newValue) Non volatile write of the waiter to the AbstractFuture.Waiter.next field.
(package private) void	putThread(AbstractFuture.Waiter waiter, java.lang.Thread newValue) Non volatile write of the thread to the AbstractFuture.Waiter.thread field.

Methods inherited from class java.lang.Object

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

Constructor Detail

SynchronizedHelper

private SynchronizedHelper()

Method Detail

putThread

void putThread(AbstractFuture.Waiter waiter,
               java.lang.Thread newValue)

Description copied from class: AbstractFuture.AtomicHelper

Non volatile write of the thread to the AbstractFuture.Waiter.thread field.

Specified by:

putThread in class AbstractFuture.AtomicHelper

putNext

void putNext(AbstractFuture.Waiter waiter,
             AbstractFuture.Waiter newValue)

Description copied from class: AbstractFuture.AtomicHelper

Non volatile write of the waiter to the AbstractFuture.Waiter.next field.

Specified by:

putNext in class AbstractFuture.AtomicHelper

casWaiters

boolean casWaiters(AbstractFuture<?> future,
                   AbstractFuture.Waiter expect,
                   AbstractFuture.Waiter update)

Description copied from class: AbstractFuture.AtomicHelper

Performs a CAS operation on the AbstractFuture.waiters field.

Specified by:

casWaiters in class AbstractFuture.AtomicHelper

casListeners

boolean casListeners(AbstractFuture<?> future,
                     AbstractFuture.Listener expect,
                     AbstractFuture.Listener update)

Description copied from class: AbstractFuture.AtomicHelper

Performs a CAS operation on the AbstractFuture.listeners field.

Specified by:

casListeners in class AbstractFuture.AtomicHelper

casValue

boolean casValue(AbstractFuture<?> future,
                 java.lang.Object expect,
                 java.lang.Object update)

Description copied from class: AbstractFuture.AtomicHelper

Performs a CAS operation on the AbstractFuture.value field.

Specified by:

casValue in class AbstractFuture.AtomicHelper