EDU.oswego.cs.dl.util.concurrent

Class SynchronizedShort

public class SynchronizedShort extends SynchronizedVariable implements Comparable, Cloneable

A class useful for offloading synch for short instance variables.

Field Summary
protected short	value_

Constructor Summary
	SynchronizedShort(short initialValue) Make a new SynchronizedShort with the given initial value, and using its own internal lock.
	SynchronizedShort(short initialValue, Object lock) Make a new SynchronizedShort with the given initial value, and using the supplied lock.

Method Summary
short	add(short amount) Add amount to value (i.e., set value += amount)
short	and(short b) Set value to value & b.
boolean	commit(short assumedValue, short newValue) Set value to newValue only if it is currently assumedValue.
int	compareTo(short other)
int	compareTo(SynchronizedShort other)
int	compareTo(Object other)
short	complement() Set the value to its complement
short	decrement() Decrement the value.
short	divide(short factor) Divide value by factor (i.e., set value /= factor)
boolean	equals(Object other)
short	get() Return the current value
int	hashCode()
short	increment() Increment the value.
short	multiply(short factor) Multiply value by factor (i.e., set value *= factor)
short	negate() Set the value to the negative of its old value
short	or(short b) Set value to value \| b.
short	set(short newValue) Set to newValue.
short	subtract(short amount) Subtract amount from value (i.e., set value -= amount)
short	swap(SynchronizedShort other) Atomically swap values with another SynchronizedShort.
String	toString()
short	xor(short b) Set value to value ^ b.

Constructor Detail

SynchronizedShort

public SynchronizedShort(short initialValue)

Make a new SynchronizedShort with the given initial value, and using its own internal lock.

SynchronizedShort

public SynchronizedShort(short initialValue, Object lock)

Make a new SynchronizedShort with the given initial value, and using the supplied lock.

Method Detail

add

public short add(short amount)

Add amount to value (i.e., set value += amount)

Returns: the new value

and

public short and(short b)

Set value to value & b.

Returns: the new value

commit

public boolean commit(short assumedValue, short newValue)

Set value to newValue only if it is currently assumedValue.

Returns: true if successful

compareTo

public int compareTo(SynchronizedShort other)

complement

public short complement()

Set the value to its complement

Returns: the new value

decrement

public short decrement()

Decrement the value.

Returns: the new value

divide

public short divide(short factor)

Divide value by factor (i.e., set value /= factor)

Returns: the new value

get

public final short get()

Return the current value

increment

public short increment()

Increment the value.

Returns: the new value

multiply

public short multiply(short factor)

Multiply value by factor (i.e., set value *= factor)

Returns: the new value

negate

public short negate()

Set the value to the negative of its old value

Returns: the new value

or

public short or(short b)

Set value to value | b.

Returns: the new value

set

public short set(short newValue)

Set to newValue.

Returns: the old value

subtract

public short subtract(short amount)

Subtract amount from value (i.e., set value -= amount)

Returns: the new value

swap

public short swap(SynchronizedShort other)

Atomically swap values with another SynchronizedShort. Uses identityHashCode to avoid deadlock when two SynchronizedShorts 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 short xor(short b)

Set value to value ^ b.

Returns: the new value