EDU.oswego.cs.dl.util.concurrent

Class SynchronizedLong

Implemented Interfaces:
Cloneable, Comparable, Executor
Known Direct Subclasses:
WaitableLong

public class SynchronizedLong
extends SynchronizedVariable
implements Comparable, Cloneable

A class useful for offloading synch for long instance variables.

[ Introduction to this package. ]

Field Summary

protected long
value_

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

lock_

Constructor Summary

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

Method Summary

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

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

execute, getLock

Field Details

value_

protected long value_

Constructor Details

SynchronizedLong

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

SynchronizedLong

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

Method Details

add

public long add(long amount)
Add amount to value (i.e., set value += amount)
Returns:
the new value

and

public long and(long b)
Set value to value & b.
Returns:
the new value

commit

public boolean commit(long assumedValue,
                      long newValue)
Set value to newValue only if it is currently assumedValue.
Returns:
true if successful

compareTo

public int compareTo(SynchronizedLong other)

compareTo

public int compareTo(Object other)

compareTo

public int compareTo(long other)

complement

public long complement()
Set the value to its complement
Returns:
the new value

decrement

public long decrement()
Decrement the value.
Returns:
the new value

divide

public long divide(long factor)
Divide value by factor (i.e., set value /= factor)
Returns:
the new value

equals

public boolean equals(Object other)

get

public final long get()
Return the current value

hashCode

public int hashCode()

increment

public long increment()
Increment the value.
Returns:
the new value

multiply

public long multiply(long factor)
Multiply value by factor (i.e., set value *= factor)
Returns:
the new value

negate

public long negate()
Set the value to the negative of its old value
Returns:
the new value

or

public long or(long b)
Set value to value | b.
Returns:
the new value

set

public long set(long newValue)
Set to newValue.
Returns:
the old value

subtract

public long subtract(long amount)
Subtract amount from value (i.e., set value -= amount)
Returns:
the new value

swap

public long swap(SynchronizedLong other)
Atomically swap values with another SynchronizedLong. Uses identityHashCode to avoid deadlock when two SynchronizedLongs attempt to simultaneously swap with each other.
Returns:
the new value

toString

public String toString()

xor

public long xor(long b)
Set value to value ^ b.
Returns:
the new value