content: /*
   * Copyright 2014-2025 Real Logic Limited.
   *
   * 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
   *
   * https://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.agrona.concurrent;
  
  import java.util.concurrent.atomic.AtomicLongFieldUpdater;
  
  /**
   * Pad out a cacheline to the left of a value to prevent false sharing.
   */
  @SuppressWarnings("unused")
  abstract class CachedEpochClockPadding
  {
      boolean p000, p001, p002, p003, p004, p005, p006, p007, p008, p009, p010, p011, p012, p013, p014, p015;
      boolean p016, p017, p018, p019, p020, p021, p022, p023, p024, p025, p026, p027, p028, p029, p030, p031;
      boolean p032, p033, p034, p035, p036, p037, p038, p039, p040, p041, p042, p043, p044, p045, p046, p047;
      boolean p048, p049, p050, p051, p052, p053, p054, p055, p056, p057, p058, p059, p060, p061, p062, p063;
  }
  
  /**
   * Value for the sequence that is expected to be padded.
   */
  abstract class CachedEpochClockValue extends CachedEpochClockPadding
  {
      /**
       * Time in milliseconds.
       */
      protected volatile long timeMs;
  }
  
  /**
   * An {@link EpochClock} that caches a timestamp which can be updated with {@link #update(long)}.
   * <p>
   * Instances are threadsafe with the read being volatile.
   */
  public class CachedEpochClock extends CachedEpochClockValue implements EpochClock
  {
      private static final AtomicLongFieldUpdater<CachedEpochClockValue> FIELD_UPDATER =
          AtomicLongFieldUpdater.newUpdater(CachedEpochClockValue.class, "timeMs");
  
      boolean p064, p065, p066, p067, p068, p069, p070, p071, p072, p073, p074, p075, p076, p077, p078, p079;
      boolean p080, p081, p082, p083, p084, p085, p086, p087, p088, p089, p090, p091, p092, p093, p094, p095;
      boolean p096, p097, p098, p099, p100, p101, p102, p103, p104, p105, p106, p107, p108, p109, p110, p111;
      boolean p112, p113, p114, p115, p116, p117, p118, p119, p120, p121, p122, p123, p124, p125, p126, p127;
  
      /**
       * Create a new instance.
       */
      public CachedEpochClock()
      {
      }
  
      /**
       * {@inheritDoc}
       */
      public long time()
      {
          return timeMs;
      }
  
      /**
       * Update the value of the timestamp in with release ordered semantics.
       *
       * @param timeMs value to update the timestamp.
       */
      public void update(final long timeMs)
      {
          FIELD_UPDATER.lazySet(this, timeMs);
      }
  
      /**
       * Advance the value of the timestamp in with release ordered semantics.
       *
       * @param millis to advance the timestamp.
       */
      public void advance(final long millis)
      {
          FIELD_UPDATER.lazySet(this, timeMs + millis);
      }
  }
  