org.jctools.queues.ConcurrentSequencedCircularArrayQueue Maven / Gradle / Ivy
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jctools.queues;
import static org.jctools.util.UnsafeLongArrayAccess.*;
public abstract class ConcurrentSequencedCircularArrayQueue extends ConcurrentCircularArrayQueue
{
protected final long[] sequenceBuffer;
public ConcurrentSequencedCircularArrayQueue(int capacity)
{
super(capacity);
int actualCapacity = (int) (this.mask + 1);
// pad data on either end with some empty slots. Note that actualCapacity is <= MAX_POW2_INT
sequenceBuffer = allocateLongArray(actualCapacity);
for (long i = 0; i < actualCapacity; i++)
{
soLongElement(sequenceBuffer, calcCircularLongElementOffset(i, mask), i);
}
}
}