pt.ua.concurrent

Class InternalBarrier

java.lang.Object

pt.ua.concurrent.CObject

pt.ua.concurrent.Barrier

pt.ua.concurrent.InternalBarrier

All Implemented Interfaces:

InterruptibleAwaitingThreads, SyncCV

Direct Known Subclasses:

DynamicBarrier, FixedBarrier

public abstract class InternalBarrier
extends Barrier

An internally triggered thread barrier abstract class.
In this type of barrier, the participating threads are the ones that release the barrier (when the number of waiting threads reach the barrier defined size).

Invariant:

size() > 0

numberWaitingThreads() >= 0 && numberWaitingThreads() < size()

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

Version:

0.5, December 2015

Author:

Miguel Oliveira e Silva (mos@ua.pt)

Constructor Summary

Constructors

Constructor and Description
InternalBarrier() Constructs a new internal barrier registering waiting threads.
InternalBarrier(boolean registerAwaitingThreads) Constructs a new internal barrier.

Method Summary

Modifier and Type	Method and Description
abstract int	size() Number of threads defined for the barrier.

Methods inherited from class pt.ua.concurrent.Barrier

await, awaitCount, count, numberWaitingThreads

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

Constructor Detail

InternalBarrier

public InternalBarrier()

Constructs a new internal barrier registering waiting threads.

InternalBarrier

public InternalBarrier(boolean registerAwaitingThreads)

Constructs a new internal barrier.

Parameters:

registerAwaitingThreads - if true, threads are registered when waiting

Method Detail

size

public abstract int size()

Number of threads defined for the barrier.

Returns:

barrier size