Overview Package Tree Index Deprecated About
Prev Class | Next ClassFrames | No Frames
Summary: Nested | Field | Method | ConstrDetail: Nested | Field | Method | Constr

EDU.oswego.cs.dl.util.concurrent

Class SynchronizedBoolean

Implemented Interfaces:
Cloneable, Comparable, Executor
Known Direct Subclasses:
WaitableBoolean
public class SynchronizedBoolean
extends SynchronizedVariable
implements Comparable, Cloneable
A class useful for offloading synch for boolean instance variables.

[ Introduction to this package. ]

Field Summary

protected boolean
value_

Fields inherited from class EDU.oswego.cs.dl.util.concurrent.SynchronizedVariable

lock_

Constructor Summary

SynchronizedBoolean(boolean initialValue)
Make a new SynchronizedBoolean with the given initial value, and using its own internal lock.
SynchronizedBoolean(boolean initialValue, Object lock)
Make a new SynchronizedBoolean with the given initial value, and using the supplied lock.

Method Summary

boolean
and(boolean b)
Set value to value & b.
boolean
commit(boolean assumedValue, boolean newValue)
Set value to newValue only if it is currently assumedValue.
int
compareTo(SynchronizedBoolean other)
int
compareTo(Object other)
int
compareTo(boolean other)
boolean
complement()
Set the value to its complement
boolean
equals(Object other)
boolean
get()
Return the current value
int
hashCode()
boolean
or(boolean b)
Set value to value | b.
boolean
set(boolean newValue)
Set to newValue.
boolean
swap(SynchronizedBoolean other)
Atomically swap values with another SynchronizedBoolean.
String
toString()
boolean
xor(boolean b)
Set value to value ^ b.

Methods inherited from class EDU.oswego.cs.dl.util.concurrent.SynchronizedVariable

execute, getLock

Field Details

value_

protected boolean value_

Constructor Details

SynchronizedBoolean

public SynchronizedBoolean(boolean initialValue)
Make a new SynchronizedBoolean with the given initial value, and using its own internal lock.

SynchronizedBoolean

public SynchronizedBoolean(boolean initialValue,
                           Object lock)
Make a new SynchronizedBoolean with the given initial value, and using the supplied lock.

Method Details

and

public boolean and(boolean b)
Set value to value & b.

Returns:
the new value

commit

public boolean commit(boolean assumedValue,
                      boolean newValue)
Set value to newValue only if it is currently assumedValue.

Returns:
true if successful

compareTo

public int compareTo(SynchronizedBoolean other)

compareTo

public int compareTo(Object other)

compareTo

public int compareTo(boolean other)

complement

public boolean complement()
Set the value to its complement

Returns:
the new value

equals

public boolean equals(Object other)

get

public final boolean get()
Return the current value

hashCode

public int hashCode()

or

public boolean or(boolean b)
Set value to value | b.

Returns:
the new value

set

public boolean set(boolean newValue)
Set to newValue.

Returns:
the old value

swap

public boolean swap(SynchronizedBoolean other)
Atomically swap values with another SynchronizedBoolean. Uses identityHashCode to avoid deadlock when two SynchronizedBooleans attempt to simultaneously swap with each other. (Note: Ordering via identyHashCode is not strictly guaranteed by the language specification to return unique, orderable values, but in practice JVMs rely on them being unique.)

Returns:
the new value

toString

public String toString()

xor

public boolean xor(boolean b)
Set value to value ^ b.

Returns:
the new value

Overview Package Tree Index Deprecated About