java.util.concurrent.locks
Class ReentrantLock.NonfairSync

java.lang.Object
  java.util.concurrent.locks.AbstractQueuedSynchronizer
      java.util.concurrent.locks.ReentrantLock.Sync
          java.util.concurrent.locks.ReentrantLock.NonfairSync

All Implemented Interfaces:

Serializable

Enclosing class:

ReentrantLock

static final class ReentrantLock.NonfairSync
extends ReentrantLock.Sync

Sync object for non-fair locks

Nested Class Summary

Nested classes/interfaces inherited from class java.util.concurrent.locks.AbstractQueuedSynchronizer

AbstractQueuedSynchronizer.ConditionObject, AbstractQueuedSynchronizer.Node

Field Summary

Fields inherited from class java.util.concurrent.locks.ReentrantLock.Sync

owner

Constructor Summary

ReentrantLock.NonfairSync()

Method Summary

(package private) void	lock() Perform lock.
protected boolean	tryAcquire(int acquires) Attempts to acquire in exclusive mode.

Methods inherited from class java.util.concurrent.locks.ReentrantLock.Sync

getHoldCount, getOwner, isHeldExclusively, isLocked, newCondition, nonfairTryAcquire, tryRelease

Methods inherited from class java.util.concurrent.locks.AbstractQueuedSynchronizer

acquire, acquireInterruptibly, acquireQueued, acquireShared, acquireSharedInterruptibly, compareAndSetState, fullyRelease, getExclusiveQueuedThreads, getFirstQueuedThread, getQueuedThreads, getQueueLength, getSharedQueuedThreads, getState, getWaitingThreads, getWaitQueueLength, hasContended, hasQueuedThreads, hasWaiters, isOnSyncQueue, isQueued, owns, release, releaseShared, setState, toString, transferAfterCancelledWait, transferForSignal, tryAcquireNanos, tryAcquireShared, tryAcquireSharedNanos, tryReleaseShared

Methods inherited from class java.lang.Object

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

Constructor Detail

ReentrantLock.NonfairSync

ReentrantLock.NonfairSync()

Method Detail

lock

final void lock()

Perform lock. Try immediate barge, backing up to normal acquire on failure.

Specified by:

lock in class ReentrantLock.Sync

tryAcquire

protected final boolean tryAcquire(int acquires)

Description copied from class: AbstractQueuedSynchronizer

Attempts to acquire in exclusive mode. This method should query if the state of the object permits it to be acquired in the exclusive mode, and if so to acquire it.

This method is always invoked by the thread performing acquire. If this method reports failure, the acquire method may queue the thread, if it is not already queued, until it is signalled by a release from some other thread. This can be used to implement method Lock.tryLock().

The default implementation throws UnsupportedOperationException

Overrides:

tryAcquire in class AbstractQueuedSynchronizer

Parameters:

acquires - the acquire argument. This value is always the one passed to an acquire method, or is the value saved on entry to a condition wait. The value is otherwise uninterpreted and can represent anything you like.

Returns:

true if successful. Upon success, this object has been acquired.