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/*
 * 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.rsocket.internal.jctools.queues;

import static io.rsocket.internal.jctools.queues.LinkedArrayQueueUtil.length;
import static io.rsocket.internal.jctools.queues.MessagePassingQueueUtil.fillUnbounded;

/**
 * An MPSC array queue which starts at initialCapacity and grows indefinitely in linked
 * chunks of the initial size. The queue grows only when the current chunk is full and elements are
 * not copied on resize, instead a link to the new chunk is stored in the old chunk for the consumer
 * to follow.
 */
public class MpscUnboundedArrayQueue extends BaseMpscLinkedArrayQueue {
  byte b000, b001, b002, b003, b004, b005, b006, b007; //  8b
  byte b010, b011, b012, b013, b014, b015, b016, b017; // 16b
  byte b020, b021, b022, b023, b024, b025, b026, b027; // 24b
  byte b030, b031, b032, b033, b034, b035, b036, b037; // 32b
  byte b040, b041, b042, b043, b044, b045, b046, b047; // 40b
  byte b050, b051, b052, b053, b054, b055, b056, b057; // 48b
  byte b060, b061, b062, b063, b064, b065, b066, b067; // 56b
  byte b070, b071, b072, b073, b074, b075, b076, b077; // 64b
  byte b100, b101, b102, b103, b104, b105, b106, b107; // 72b
  byte b110, b111, b112, b113, b114, b115, b116, b117; // 80b
  byte b120, b121, b122, b123, b124, b125, b126, b127; // 88b
  byte b130, b131, b132, b133, b134, b135, b136, b137; // 96b
  byte b140, b141, b142, b143, b144, b145, b146, b147; // 104b
  byte b150, b151, b152, b153, b154, b155, b156, b157; // 112b
  byte b160, b161, b162, b163, b164, b165, b166, b167; // 120b
  byte b170, b171, b172, b173, b174, b175, b176, b177; // 128b

  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) {
    return fillUnbounded(this, s);
  }

  @Override
  protected int getNextBufferSize(E[] buffer) {
    return length(buffer);
  }

  @Override
  protected long getCurrentBufferCapacity(long mask) {
    return mask;
  }
}