Module java.base
Package java.util.concurrent.locks
Class AbstractQueuedLongSynchronizer.ConditionObject
java.lang.Object
java.util.concurrent.locks.AbstractQueuedLongSynchronizer.ConditionObject
- All Implemented Interfaces:
Serializable,Condition
- Enclosing class:
AbstractQueuedLongSynchronizer
public class AbstractQueuedLongSynchronizer.ConditionObject
extends Object
implements Condition, Serializable
Condition implementation for a
AbstractQueuedLongSynchronizer
serving as the basis of a Lock implementation.
Method documentation for this class describes mechanics,
not behavioral specifications from the point of view of Lock
and Condition users. Exported versions of this class will in
general need to be accompanied by documentation describing
condition semantics that rely on those of the associated
AbstractQueuedLongSynchronizer.
This class is Serializable, but all fields are transient, so deserialized conditions have no waiters.
- See Also:
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionfinal voidawait()Implements interruptible condition wait.final booleanImplements timed condition wait.final longawaitNanos(long nanosTimeout) Implements timed condition wait.final voidImplements uninterruptible condition wait.final booleanawaitUntil(Date deadline) Implements absolute timed condition wait.protected final Collection<Thread> Returns a collection containing those threads that may be waiting on this Condition.protected final intReturns an estimate of the number of threads waiting on this condition.protected final booleanQueries whether any threads are waiting on this condition.final voidsignal()Moves the longest-waiting thread, if one exists, from the wait queue for this condition to the wait queue for the owning lock.final voidMoves all threads from the wait queue for this condition to the wait queue for the owning lock.
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Constructor Details
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ConditionObject
public ConditionObject()Creates a newConditionObjectinstance.
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Method Details
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signal
public final void signal()Moves the longest-waiting thread, if one exists, from the wait queue for this condition to the wait queue for the owning lock.- Specified by:
signalin interfaceCondition- Throws:
IllegalMonitorStateException- ifAbstractQueuedLongSynchronizer.isHeldExclusively()returnsfalse
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signalAll
public final void signalAll()Moves all threads from the wait queue for this condition to the wait queue for the owning lock.- Specified by:
signalAllin interfaceCondition- Throws:
IllegalMonitorStateException- ifAbstractQueuedLongSynchronizer.isHeldExclusively()returnsfalse
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awaitUninterruptibly
public final void awaitUninterruptibly()Implements uninterruptible condition wait.- Save lock state returned by
AbstractQueuedLongSynchronizer.getState(). - Invoke
AbstractQueuedLongSynchronizer.release(long)with saved state as argument, throwing IllegalMonitorStateException if it fails. - Block until signalled.
- Reacquire by invoking specialized version of
AbstractQueuedLongSynchronizer.acquire(java.util.concurrent.locks.AbstractQueuedLongSynchronizer.Node, long, boolean, boolean, boolean, long)with saved state as argument.
- Specified by:
awaitUninterruptiblyin interfaceCondition
- Save lock state returned by
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await
Implements interruptible condition wait.- If current thread is interrupted, throw InterruptedException.
- Save lock state returned by
AbstractQueuedLongSynchronizer.getState(). - Invoke
AbstractQueuedLongSynchronizer.release(long)with saved state as argument, throwing IllegalMonitorStateException if it fails. - Block until signalled or interrupted.
- Reacquire by invoking specialized version of
AbstractQueuedLongSynchronizer.acquire(java.util.concurrent.locks.AbstractQueuedLongSynchronizer.Node, long, boolean, boolean, boolean, long)with saved state as argument. - If interrupted while blocked in step 4, throw InterruptedException.
- Specified by:
awaitin interfaceCondition- Throws:
InterruptedException- if the current thread is interrupted (and interruption of thread suspension is supported)
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awaitNanos
Implements timed condition wait.- If current thread is interrupted, throw InterruptedException.
- Save lock state returned by
AbstractQueuedLongSynchronizer.getState(). - Invoke
AbstractQueuedLongSynchronizer.release(long)with saved state as argument, throwing IllegalMonitorStateException if it fails. - Block until signalled, interrupted, or timed out.
- Reacquire by invoking specialized version of
AbstractQueuedLongSynchronizer.acquire(java.util.concurrent.locks.AbstractQueuedLongSynchronizer.Node, long, boolean, boolean, boolean, long)with saved state as argument. - If interrupted while blocked in step 4, throw InterruptedException.
- Specified by:
awaitNanosin interfaceCondition- Parameters:
nanosTimeout- the maximum time to wait, in nanoseconds- Returns:
- an estimate of the
nanosTimeoutvalue minus the time spent waiting upon return from this method. A positive value may be used as the argument to a subsequent call to this method to finish waiting out the desired time. A value less than or equal to zero indicates that no time remains. - Throws:
InterruptedException- if the current thread is interrupted (and interruption of thread suspension is supported)
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awaitUntil
Implements absolute timed condition wait.- If current thread is interrupted, throw InterruptedException.
- Save lock state returned by
AbstractQueuedLongSynchronizer.getState(). - Invoke
AbstractQueuedLongSynchronizer.release(long)with saved state as argument, throwing IllegalMonitorStateException if it fails. - Block until signalled, interrupted, or timed out.
- Reacquire by invoking specialized version of
AbstractQueuedLongSynchronizer.acquire(java.util.concurrent.locks.AbstractQueuedLongSynchronizer.Node, long, boolean, boolean, boolean, long)with saved state as argument. - If interrupted while blocked in step 4, throw InterruptedException.
- If timed out while blocked in step 4, return false, else true.
- Specified by:
awaitUntilin interfaceCondition- Parameters:
deadline- the absolute time to wait until- Returns:
falseif the deadline has elapsed upon return, elsetrue- Throws:
InterruptedException- if the current thread is interrupted (and interruption of thread suspension is supported)
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await
Implements timed condition wait.- If current thread is interrupted, throw InterruptedException.
- Save lock state returned by
AbstractQueuedLongSynchronizer.getState(). - Invoke
AbstractQueuedLongSynchronizer.release(long)with saved state as argument, throwing IllegalMonitorStateException if it fails. - Block until signalled, interrupted, or timed out.
- Reacquire by invoking specialized version of
AbstractQueuedLongSynchronizer.acquire(java.util.concurrent.locks.AbstractQueuedLongSynchronizer.Node, long, boolean, boolean, boolean, long)with saved state as argument. - If interrupted while blocked in step 4, throw InterruptedException.
- If timed out while blocked in step 4, return false, else true.
- Specified by:
awaitin interfaceCondition- Parameters:
time- the maximum time to waitunit- the time unit of thetimeargument- Returns:
falseif the waiting time detectably elapsed before return from the method, elsetrue- Throws:
InterruptedException- if the current thread is interrupted (and interruption of thread suspension is supported)
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hasWaiters
protected final boolean hasWaiters()Queries whether any threads are waiting on this condition. ImplementsAbstractQueuedLongSynchronizer.hasWaiters(ConditionObject).- Returns:
trueif there are any waiting threads- Throws:
IllegalMonitorStateException- ifAbstractQueuedLongSynchronizer.isHeldExclusively()returnsfalse
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getWaitQueueLength
protected final int getWaitQueueLength()Returns an estimate of the number of threads waiting on this condition. ImplementsAbstractQueuedLongSynchronizer.getWaitQueueLength(ConditionObject).- Returns:
- the estimated number of waiting threads
- Throws:
IllegalMonitorStateException- ifAbstractQueuedLongSynchronizer.isHeldExclusively()returnsfalse
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getWaitingThreads
Returns a collection containing those threads that may be waiting on this Condition. ImplementsAbstractQueuedLongSynchronizer.getWaitingThreads(ConditionObject).- Returns:
- the collection of threads
- Throws:
IllegalMonitorStateException- ifAbstractQueuedLongSynchronizer.isHeldExclusively()returnsfalse
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