arlut.csd.Util
Class booleanSemaphore

java.lang.Object
  |
  +--arlut.csd.Util.booleanSemaphore

public class booleanSemaphore

extends java.lang.Object

Simple, synchronized boolean flag class.

This class is useful for providing a reliable boolean flag that can be examined by separate threads without worry over funky memory model behavior on multiprocessor systems, etc.

Field Summary

private boolean

state

Constructor Summary

booleanSemaphore(boolean initialState)

Method Summary

boolean	isSet()
boolean	set(boolean b) Simple bidirectional test and set.

Methods inherited from class java.lang.Object

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

Field Detail

state

private boolean state

Constructor Detail

booleanSemaphore

public booleanSemaphore(boolean initialState)

Method Detail

isSet

public boolean isSet()

set

public boolean set(boolean b)

Simple bidirectional test and set.

Returns:

The value that the booleanSemaphore had before set() was called.