File	Doc	Category	Size	Date	Package
AtomicBoolean.java	API Doc	Android 1.5 API	3746	Wed May 06 22:41:02 BST 2009	java.util.concurrent.atomic

AtomicBoolean

• java.lang.Object

Fields Summary
private static final long	serialVersionUID
private static final Unsafe	unsafe
private static final long	valueOffset
private volatile int	value

Constructors Summary
public AtomicBoolean(boolean initialValue) Creates a new AtomicBoolean with the given initial value. param initialValue the initial value value = initialValue ? 1 : 0;
public AtomicBoolean() Creates a new AtomicBoolean with initial value false.

Methods Summary
public final boolean	compareAndSet(boolean expect, boolean update) Atomically sets the value to the given update value if the current value is equal to the expected value. Any given invocation of this operation may fail (return false) spuriously, but repeated invocation when the current value holds the expected value and no other thread is also attempting to set the value will eventually succeed. param expect the expected value param update the new value return true if successful int e = expect ? 1 : 0; int u = update ? 1 : 0; return unsafe.compareAndSwapInt(this, valueOffset, e, u);
public final boolean	get() Returns the current value. return the current value return value != 0;
public final boolean	getAndSet(boolean newValue) Sets to the given value and returns the previous value. param newValue the new value return the previous value for (;;) { boolean current = get(); if (compareAndSet(current, newValue)) return current; }
public final void	set(boolean newValue) Unconditionally sets to the given value. param newValue the new value value = newValue ? 1 : 0;
public java.lang.String	toString() Returns the String representation of the current value. return the String representation of the current value. return Boolean.toString(get());
public boolean	weakCompareAndSet(boolean expect, boolean update) Atomically set the value to the given updated value if the current value == the expected value. May fail spuriously. param expect the expected value param update the new value return true if successful. int e = expect ? 1 : 0; int u = update ? 1 : 0; return unsafe.compareAndSwapInt(this, valueOffset, e, u);