co.paralleluniverse.strands.queues.SingleConsumerArrayDoubleQueue Maven / Gradle / Ivy
/*
* Quasar: lightweight threads and actors for the JVM.
* Copyright (c) 2013-2015, Parallel Universe Software Co. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 3.0
* as published by the Free Software Foundation.
*/
package co.paralleluniverse.strands.queues;
/**
*
* @author pron
*/
public class SingleConsumerArrayDoubleQueue extends SingleConsumerArrayDWordQueue implements BasicSingleConsumerDoubleQueue {
public SingleConsumerArrayDoubleQueue(int capacity) {
super(capacity);
}
@Override
public boolean enq(double item) {
return enqRaw(Double.doubleToRawLongBits(item));
}
@Override
public boolean enq(Double item) {
if (item == null)
throw new IllegalArgumentException("null values not allowed");
return enq(item.doubleValue());
}
double doubleValue(int index) {
return Double.longBitsToDouble(rawValue(index));
}
@Override
Double value(int index) {
return doubleValue(index);
}
@Override
public double pollDouble() {
final int n = pk();
final double val = doubleValue(n);
deq(n);
return val;
}
@Override
public DoubleQueueIterator iterator() {
return new DoubleArrayQueueIterator();
}
private class DoubleArrayQueueIterator extends ArrayQueueIterator implements DoubleQueueIterator {
@Override
public double doubleValue() {
return SingleConsumerArrayDoubleQueue.this.doubleValue(n);
}
@Override
public double doubleNext() {
n = succ(n);
return doubleValue();
}
}
}