ch.aplu.nxt
Class CQueue

java.lang.Object
  ch.aplu.nxt.CQueue

public class CQueue
extends java.lang.Object

Implementation of a circular queue of fixed size (FIFO buffer) containing elements of class CQueueData.

See Also:

CQueueData

Constructor Summary

CQueue(int size)
Creates a queue with given maximal number of elements.

Method Summary

int	available() Returns the current number of data elements in the queue.
CQueueData	get() Returns the next element from the queue.
boolean	put(CQueueData data) Puts given given element at the next position of the queue.

Methods inherited from class java.lang.Object

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

Constructor Detail

CQueue

public CQueue(int size)

Creates a queue with given maximal number of elements. For size <= 0 no buffer is available.

Parameters:

size - the size of the queue (maximal number of elements before overrun)

Method Detail

put

public boolean put(CQueueData data)

Puts given given element at the next position of the queue.

Returns:

true, if successful; false, if overrun or no buffer available

get

public CQueueData get()

Returns the next element from the queue.

Returns:

a reference to a clone of the next available element or null, if queue is empty or no buffer available

available

public int available()

Returns the current number of data elements in the queue.

Returns:

the number of elements or -1 if no buffer available