ReentrantLock与AQS

ReentrantLock.Sync

lock()nonfairTryAcquire(int acquires)newCondition():ConditionObjectgetOwner():ThreadgetHoldCount():intisLocked():boolean

AbstractOwnableSynchronizer

- exclusiveOwnerThread:Thread

AbstractQueuedSynchronizer.Node

waitStatus:intprev:Nodenext:Nodethread:ThreadnextWaiter:Node

predecessor():NodeisShared():boolean

Lock

ReentrantLock

- sync:Sync

+ ReentrantLock()+ ReentrantLock(boolean fair)+ getHoldCount():int+ isHeldByCurrentThread():boolean+ isLocked():boolean+ isFair():boolean+ hasQueuedThreads():boolean+ hasQueuedThread(Thread thread):boolean+ getQueueLength():int+ hasWaiters(Condition condition):boolean+ getWaitQueueLength(Condition condition):int

AbstractQueuedSynchronizer

- head:Node- tail:Node- state:int

ReentrantLock.NonfairSync

ReentrantLock.FairSync

Condition

AbstractQueuedSynchronizer.ConditionObject

- firstWaiter:Node- lastWaiter:Node

+ operation1(params):returnType- addConditionWaiter():Node- doSignal(Node first)- doSignalAll(Node first)- unlinkCancelledWaiters()- checkInterruptWhileWaiting(Node node)- reportInterruptAfterWait(int interruptMode)isOwnedBy(AbstractQueuedSynchronizer sync):boolean# hasWaiters():boolean# getWaitQueueLength():int# getWaitingThreads():Collection<Thread>