alluxio.concurrent

Class WeakSafeReentrantReadWriteLock

java.lang.Object

alluxio.concurrent.WeakSafeReentrantReadWriteLock

All Implemented Interfaces:

ReadWriteLock

public final class WeakSafeReentrantReadWriteLock
extends Object
implements ReadWriteLock

ReadWriteLock implementation whose read and write locks retain a reference back to this lock. Otherwise, a reference to just the read lock or just the write lock would not suffice to ensure the ReadWriteLock is retained. Adapted from https://github.com/google/guava/blob/v27.0.1/guava/src/com/google/common/util/concurrent/Striped.java#L319

Constructor Summary

Constructors

Constructor and Description
WeakSafeReentrantReadWriteLock() Creates a new lock.

Method Summary

Modifier and Type	Method and Description
int	getReadHoldCount() Queries the number of reentrant read holds on this lock by the current thread.
int	getWriteHoldCount() Queries the number of reentrant write holds on this lock by the current thread.
Lock	readLock()
Lock	writeLock()

Methods inherited from class java.lang.Object

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

Constructor Detail

WeakSafeReentrantReadWriteLock

public WeakSafeReentrantReadWriteLock()

Creates a new lock.

Method Detail

readLock

public Lock readLock()

Specified by:

readLock in interface ReadWriteLock

writeLock

public Lock writeLock()

Specified by:

writeLock in interface ReadWriteLock

getReadHoldCount

public int getReadHoldCount()

Queries the number of reentrant read holds on this lock by the current thread. A reader thread has a hold on a lock for each lock action that is not matched by an unlock action.

Returns:

the number of holds on the read lock by the current thread, or zero if the read lock is not held by the current thread

getWriteHoldCount

public int getWriteHoldCount()

Queries the number of reentrant write holds on this lock by the current thread. A writer thread has a hold on a lock for each lock action that is not matched by an unlock action.

Returns:

the number of holds on the write lock by the current thread, or zero if the write lock is not held by the current thread