pt.ua.concurrent

Class TransientSignal

java.lang.Object

pt.ua.concurrent.CObject

pt.ua.concurrent.TransientSignal

All Implemented Interfaces:

InterruptibleAwaitingThreads, Signal, SyncCV

public class TransientSignal
extends CObject
implements Signal

A transient signal module (signals thrown away if no one is waiting). This mechanism is similar to the behavior of the signal/await of a condition variable.

This class follows DbC(tm) methodology (Wikipedia). Where possible, contracts are implement with native's Java assert.

Author:

Miguel Oliveira e Silva (mos@ua.pt)

Constructor Summary

Constructors

Constructor and Description
TransientSignal() Constructs a new TransientSignal registering waiting threads.
TransientSignal(boolean registerAwaitingThreads) Constructs a new TransientSignal.

Method Summary

Modifier and Type	Method and Description
void	await() Object's wait replacement, in which: - the checked exception InterruptedException, is replaced by the unchecked exception ThreadInterruptedException; - supports the registration of waiting threads for interrupt purposes.
void	send() Signaling (sender).

Methods inherited from class pt.ua.concurrent.CObject

await, await, broadcast, interruptWaitingThreads, lockIsMine, registerAwaitingThreads, signal, syncronizedLockIsMine

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface pt.ua.concurrent.InterruptibleAwaitingThreads

interruptWaitingThreads, registerAwaitingThreads

Constructor Detail

TransientSignal

public TransientSignal()

Constructs a new TransientSignal registering waiting threads.

TransientSignal

public TransientSignal(boolean registerAwaitingThreads)

Constructs a new TransientSignal.

Parameters:

registerAwaitingThreads - if true, threads are registered when waiting

Method Detail

send

public void send()

Description copied from interface: Signal

Signaling (sender).

Specified by:

send in interface Signal

await

public void await()

Description copied from class: CObject

Object's wait replacement, in which:
- the checked exception InterruptedException, is replaced by the unchecked exception ThreadInterruptedException;
- supports the registration of waiting threads for interrupt purposes.

Precondition:

syncronizedLockIsMine() - native lock owned by me

Specified by:

await in interface Signal

Specified by:

await in interface SyncCV

Overrides:

await in class CObject