io.netty.util.internal.MpscLinkedQueueHeadRef Maven / Gradle / Ivy
/*
* Copyright 2014 The Netty Project
*
* The Netty Project licenses this file to you 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 io.netty.util.internal;
import java.io.Serializable;
import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
abstract class MpscLinkedQueueHeadRef extends MpscLinkedQueuePad0 implements Serializable {
private static final long serialVersionUID = 8467054865577874285L;
@SuppressWarnings("rawtypes")
private static final AtomicReferenceFieldUpdater UPDATER;
static {
@SuppressWarnings("rawtypes")
AtomicReferenceFieldUpdater updater;
updater = PlatformDependent.newAtomicReferenceFieldUpdater(MpscLinkedQueueHeadRef.class, "headRef");
if (updater == null) {
updater = AtomicReferenceFieldUpdater.newUpdater(
MpscLinkedQueueHeadRef.class, MpscLinkedQueueNode.class, "headRef");
}
UPDATER = updater;
}
private transient volatile MpscLinkedQueueNode headRef;
protected final MpscLinkedQueueNode headRef() {
return headRef;
}
protected final void setHeadRef(MpscLinkedQueueNode headRef) {
this.headRef = headRef;
}
protected final void lazySetHeadRef(MpscLinkedQueueNode headRef) {
UPDATER.lazySet(this, headRef);
}
}