EDU.oswego.cs.dl.util.concurrent

Class WaitableLong

java.lang.Object

EDU.oswego.cs.dl.util.concurrent.SynchronizedVariable

EDU.oswego.cs.dl.util.concurrent.SynchronizedLong

EDU.oswego.cs.dl.util.concurrent.WaitableLong

All Implemented Interfaces:

Executor, java.lang.Cloneable, java.lang.Comparable

public class WaitableLong
extends SynchronizedLong

A class useful for offloading waiting and signalling operations on single long variables.

[ Introduction to this package. ]

Field Summary

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

value_

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

lock_

Constructor Summary

Constructors

Constructor and Description
WaitableLong(long initialValue) Make a new WaitableLong with the given initial value, and using its own internal lock.
WaitableLong(long initialValue, java.lang.Object lock) Make a new WaitableLong with the given initial value, and using the supplied lock.

Method Summary

Modifier and Type	Method and Description
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.
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)
long	increment() Increment the value.
long	multiply(long factor) Multiply value by factor (i.e., set value *= factor)
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)
void	whenEqual(long c, java.lang.Runnable action) Wait until value equals c, then run action if nonnull.
void	whenGreater(long c, java.lang.Runnable action) wait until value greater than c, then run action if nonnull.
void	whenGreaterEqual(long c, java.lang.Runnable action) wait until value greater than or equal to c, then run action if nonnull.
void	whenLess(long c, java.lang.Runnable action) wait until value less than c, then run action if nonnull.
void	whenLessEqual(long c, java.lang.Runnable action) wait until value less than or equal to c, then run action if nonnull.
void	whenNotEqual(long c, java.lang.Runnable action) wait until value not equal to c, then run action if nonnull.
long	xor(long b) Set value to value ^ b.

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

compareTo, compareTo, compareTo, equals, get, hashCode, negate, swap, toString

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

execute, getLock

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

WaitableLong

public WaitableLong(long initialValue)

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

WaitableLong

public WaitableLong(long initialValue,
                    java.lang.Object lock)

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

Method Detail

set

public long set(long newValue)

Description copied from class: SynchronizedLong

Set to newValue.

Overrides:

set in class SynchronizedLong

Returns:

the old value

commit

public boolean commit(long assumedValue,
                      long newValue)

Description copied from class: SynchronizedLong

Set value to newValue only if it is currently assumedValue.

Overrides:

commit in class SynchronizedLong

Returns:

true if successful

increment

public long increment()

Description copied from class: SynchronizedLong

Increment the value.

Overrides:

increment in class SynchronizedLong

Returns:

the new value

decrement

public long decrement()

Description copied from class: SynchronizedLong

Decrement the value.

Overrides:

decrement in class SynchronizedLong

Returns:

the new value

add

public long add(long amount)

Description copied from class: SynchronizedLong

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

Overrides:

add in class SynchronizedLong

Returns:

the new value

subtract

public long subtract(long amount)

Description copied from class: SynchronizedLong

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

Overrides:

subtract in class SynchronizedLong

Returns:

the new value

multiply

public long multiply(long factor)

Description copied from class: SynchronizedLong

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

Overrides:

multiply in class SynchronizedLong

Returns:

the new value

divide

public long divide(long factor)

Description copied from class: SynchronizedLong

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

Overrides:

divide in class SynchronizedLong

Returns:

the new value

complement

public long complement()

Set the value to its complement

Overrides:

complement in class SynchronizedLong

Returns:

the new value

and

public long and(long b)

Set value to value & b.

Overrides:

and in class SynchronizedLong

Returns:

the new value

or

public long or(long b)

Set value to value | b.

Overrides:

or in class SynchronizedLong

Returns:

the new value

xor

public long xor(long b)

Set value to value ^ b.

Overrides:

xor in class SynchronizedLong

Returns:

the new value

whenEqual

public void whenEqual(long c,
                      java.lang.Runnable action)
               throws java.lang.InterruptedException

Wait until value equals c, then run action if nonnull. The action is run with the synchronization lock held.

Throws:

java.lang.InterruptedException

whenNotEqual

public void whenNotEqual(long c,
                         java.lang.Runnable action)
                  throws java.lang.InterruptedException

wait until value not equal to c, then run action if nonnull. The action is run with the synchronization lock held.

Throws:

java.lang.InterruptedException

whenLessEqual

public void whenLessEqual(long c,
                          java.lang.Runnable action)
                   throws java.lang.InterruptedException

wait until value less than or equal to c, then run action if nonnull. The action is run with the synchronization lock held.

Throws:

java.lang.InterruptedException

whenLess

public void whenLess(long c,
                     java.lang.Runnable action)
              throws java.lang.InterruptedException

wait until value less than c, then run action if nonnull. The action is run with the synchronization lock held.

Throws:

java.lang.InterruptedException

whenGreaterEqual

public void whenGreaterEqual(long c,
                             java.lang.Runnable action)
                      throws java.lang.InterruptedException

wait until value greater than or equal to c, then run action if nonnull. The action is run with the synchronization lock held.

Throws:

java.lang.InterruptedException

whenGreater

public void whenGreater(long c,
                        java.lang.Runnable action)
                 throws java.lang.InterruptedException

wait until value greater than c, then run action if nonnull. The action is run with the synchronization lock held.

Throws:

java.lang.InterruptedException