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Java Source Code / Java Documentation » Ajax » Laszlo 4.0.10 » EDU.oswego.cs.dl.util.concurrent

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

EDU.oswego.cs.dl.util.concurrent .SemaphoreControlledChannel

EDU.oswego.cs.dl.util.concurrent .Slot

Slot

public class Slot extends SemaphoreControlledChannel (Code)

A one-slot buffer, using semaphores to control access. Slots are usually more efficient and controllable than using other bounded buffers implementations with capacity of 1.

Among other applications, Slots can be convenient in token-passing designs: Here. the Slot holds a some object serving as a token, that can be obtained and returned by various threads.

[ Introduction to this package. ]

Field Summary
protected Object	item_

Constructor Summary
public	Slot(Class semaphoreClass) Create a buffer with the given capacity, using the supplied Semaphore class for semaphores.
public	Slot()

Method Summary
protected synchronized Object	extract()
protected synchronized void	insert(Object x)
public synchronized Object	peek()

Field Detail

item_
protected Object item_(Code)
	The slot *

Constructor Detail

Slot
public Slot(Class semaphoreClass) throws NoSuchMethodException, SecurityException, InstantiationException, IllegalAccessException, InvocationTargetException(Code)
	Create a buffer with the given capacity, using the supplied Semaphore class for semaphores. exception: NoSuchMethodException - If class does not have constructor that intializes permits exception: SecurityException - if constructor information not accessible exception: InstantiationException - if semaphore class is abstract exception: IllegalAccessException - if constructor cannot be called exception: InvocationTargetException - if semaphore constructor throws anexception

Slot
public Slot()(Code)
	Create a new Slot using default Semaphore implementations

Method Detail

extract
protected synchronized Object extract()(Code)
	Take item known to exist *

insert
protected synchronized void insert(Object x)(Code)
	Set the item in preparation for a take *

peek
public synchronized Object peek()(Code)

Fields inherited from EDU.oswego.cs.dl.util.concurrent.SemaphoreControlledChannel

protected int capacity_(Code)(Java Doc)
final protected Semaphore putGuard_(Code)(Java Doc)
final protected Semaphore takeGuard_(Code)(Java Doc)

Methods inherited from EDU.oswego.cs.dl.util.concurrent.SemaphoreControlledChannel

public int capacity()(Code)(Java Doc)
abstract protected Object extract()(Code)(Java Doc)
abstract protected void insert(Object x)(Code)(Java Doc)
public boolean offer(Object x, long msecs) throws InterruptedException(Code)(Java Doc)
public Object poll(long msecs) throws InterruptedException(Code)(Java Doc)
public void put(Object x) throws InterruptedException(Code)(Java Doc)
public int size()(Code)(Java Doc)
public Object take() throws InterruptedException(Code)(Java Doc)

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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