io.netty.util.internal.shaded.org.jctools.queues.MpscUnboundedArrayQueue 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 io.netty.util.internal.shaded.org.jctools.queues;
import io.netty.util.internal.shaded.org.jctools.util.PortableJvmInfo;
import static io.netty.util.internal.shaded.org.jctools.queues.LinkedArrayQueueUtil.length;
/**
* An MPSC array queue which starts at initialCapacity and grows to maxCapacity in linked chunks
* of the initial size. The queue grows only when the current buffer is full and elements are not copied on
* resize, instead a link to the new buffer is stored in the old buffer for the consumer to follow.
*
* @param
*/
public class MpscUnboundedArrayQueue extends BaseMpscLinkedArrayQueue
{
long p0, p1, p2, p3, p4, p5, p6, p7;
long p10, p11, p12, p13, p14, p15, p16, p17;
public MpscUnboundedArrayQueue(int chunkSize)
{
super(chunkSize);
}
@Override
protected long availableInQueue(long pIndex, long cIndex)
{
return Integer.MAX_VALUE;
}
@Override
public int capacity()
{
return MessagePassingQueue.UNBOUNDED_CAPACITY;
}
@Override
public int drain(Consumer c)
{
return drain(c, 4096);
}
@Override
public int fill(Supplier s)
{
long result = 0;// result is a long because we want to have a safepoint check at regular intervals
final int capacity = 4096;
do
{
final int filled = fill(s, PortableJvmInfo.RECOMENDED_OFFER_BATCH);
if (filled == 0)
{
return (int) result;
}
result += filled;
}
while (result <= capacity);
return (int) result;
}
@Override
protected int getNextBufferSize(E[] buffer)
{
return length(buffer);
}
@Override
protected long getCurrentBufferCapacity(long mask)
{
return mask;
}
}