org.jscsi.target.util

Class BinaryLock

java.lang.Object

org.jscsi.target.util.BinaryLock

public class BinaryLock
extends Object

Instances of BinaryLock can be used to prevent concurrent access to the same resource, so, in essence, this is a very simplified Lock implementation, however lacking many advanced capabilities.

A BinaryLock knows only two states, locked and unlocked. Attempts by the lock-holder to lock a BinaryLock when locked or to unlock it when unlocked, will have no effect.

Author:

Andreas Ergenzinger

Constructor Summary

Constructors

Constructor and Description
BinaryLock()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	lock() This method is used to acquire the lock.
void	unlock() Releases the lock when called by the current lock holder;

Methods inherited from class java.lang.Object

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

Constructor Detail

BinaryLock

public BinaryLock()

Method Detail

lock

public boolean lock()

This method is used to acquire the lock. It will block until no other Thread is holding the lock and then return true to indicate the successful lock acquisition, or return false, if the calling Thread was interrupted while waiting for the lock.

If the caller is already holding the lock, the method will immediately return true without any changes.

Returns:

true if and only if the lock has been acquired

unlock

public void unlock()

Releases the lock when called by the current lock holder;