Package EDU.oswego.cs.dl.util.concurrent

Class WaitableChar

java.lang.Object

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

EDU.oswego.cs.dl.util.concurrent.SynchronizedChar

EDU.oswego.cs.dl.util.concurrent.WaitableChar

All Implemented Interfaces:

Executor, Cloneable, Comparable

public class WaitableChar
extends SynchronizedChar

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

[ Introduction to this package. ]

Field Summary

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

value_

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

lock_

Constructor Summary

Constructors

Constructor	Description
WaitableChar(char initialValue)	Make a new WaitableChar with the given initial value, and using its own internal lock.
WaitableChar(char initialValue, Object lock)	Make a new WaitableChar with the given initial value, and using the supplied lock.

Method Summary

Modifier and Type	Method	Description
char	add(char amount)	Add amount to value (i.e., set value += amount)
boolean	commit(char assumedValue, char newValue)	Set value to newValue only if it is currently assumedValue.
char	divide(char factor)	Divide value by factor (i.e., set value /= factor)
char	multiply(char factor)	Multiply value by factor (i.e., set value *= factor)
char	set(char newValue)	Set to newValue.
char	subtract(char amount)	Subtract amount from value (i.e., set value -= amount)
void	whenEqual(char c, Runnable action)	Wait until value equals c, then run action if nonnull.
void	whenGreater(char c, Runnable action)	wait until value greater than c, then run action if nonnull.
void	whenGreaterEqual(char c, Runnable action)	wait until value greater than or equal to c, then run action if nonnull.
void	whenLess(char c, Runnable action)	wait until value less than c, then run action if nonnull.
void	whenLessEqual(char c, Runnable action)	wait until value less than or equal to c, then run action if nonnull.
void	whenNotEqual(char c, Runnable action)	wait until value not equal to c, then run action if nonnull.

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

compareTo, compareTo, compareTo, equals, get, hashCode, 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

WaitableChar

public WaitableChar(char initialValue)

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

WaitableChar

public WaitableChar(char initialValue,
                    Object lock)

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

Method Detail

set

public char set(char newValue)

Description copied from class: SynchronizedChar

Set to newValue.

Overrides:

set in class SynchronizedChar

Returns:

the old value

commit

public boolean commit(char assumedValue,
                      char newValue)

Description copied from class: SynchronizedChar

Set value to newValue only if it is currently assumedValue.

Overrides:

commit in class SynchronizedChar

Returns:

true if successful

add

public char add(char amount)

Description copied from class: SynchronizedChar

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

Overrides:

add in class SynchronizedChar

Returns:

the new value

subtract

public char subtract(char amount)

Description copied from class: SynchronizedChar

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

Overrides:

subtract in class SynchronizedChar

Returns:

the new value

multiply

public char multiply(char factor)

Description copied from class: SynchronizedChar

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

Overrides:

multiply in class SynchronizedChar

Returns:

the new value

divide

public char divide(char factor)

Description copied from class: SynchronizedChar

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

Overrides:

divide in class SynchronizedChar

Returns:

the new value

whenEqual

public void whenEqual(char c,
                      Runnable action)
               throws InterruptedException

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

Throws:

InterruptedException

whenNotEqual

public void whenNotEqual(char c,
                         Runnable action)
                  throws InterruptedException

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

Throws:

InterruptedException

whenLessEqual

public void whenLessEqual(char c,
                          Runnable action)
                   throws 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:

InterruptedException

whenLess

public void whenLess(char c,
                     Runnable action)
              throws InterruptedException

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

Throws:

InterruptedException

whenGreaterEqual

public void whenGreaterEqual(char c,
                             Runnable action)
                      throws 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:

InterruptedException

whenGreater

public void whenGreater(char c,
                        Runnable action)
                 throws InterruptedException

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

Throws:

InterruptedException