com.dautelle.util
Class ReentrantLock

java.lang.Object
  com.dautelle.util.ReentrantLock

public class ReentrantLock

extends java.lang.Object

This class represents a reentranl lock with the same semantics as built-in Java synchronized locks: Once a thread has a lock, it can re-obtain it any number of times without blocking.

This class is public domain (not copyrighted).

Version:

4.4, March 31, 2003

Author:

Doug Lea, Jean-Marie Dautelle

Constructor Summary

ReentrantLock()
Default constructor.

Method Summary

java.lang.Thread	getOwner() Returns the thread owner of this ReentrantLock.
void	lock() Acquires the lock.
boolean	tryLock() Acquires the lock only if it not held by another thread.
void	unlock() Attempts to release this lock.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReentrantLock

public ReentrantLock()

Default constructor.

Method Detail

lock

public void lock()

Acquires the lock.

tryLock

public boolean tryLock()

Acquires the lock only if it not held by another thread.

Returns:

true if the lock was free and was acquired by the current thread, or the lock was already held by the current thread; false otherwise.

unlock

public void unlock()

Attempts to release this lock. The lock is actually released if at least as many unlock() as lock() have been performed on this ReentrantLock by the current thread. throws IllegalMonitorStateExeception if the current thread does not hold this lock.

getOwner

public java.lang.Thread getOwner()

Returns the thread owner of this ReentrantLock.

Returns:

the owner of this lock.