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;
  
  /**
   * Low-latency idle strategy to be employed in loops that do significant work on each iteration such that any
   * work in the idle strategy would be wasteful.
   *
   * <p>
   * The {@link NoOpIdleStrategy} should be used with care:
   * <ol>
   *     <li>It could increase power consumption.</li>
   *     <li>The increased power consumption could lead to thermal throttling causing an overall performance drop.</li>
   *     <li>It could consume resources that otherwise would be used by the hyper-sibling.</li>
   *     <li>It could lead to a memory order violation at the end of the loop causing a pipeline reset.</li>
   * </ol>
   * The {@link BusySpinIdleStrategy} might be a better alternative in some scenarios. That being said, using
   * {@link NoOpIdleStrategy} is perfectly fine if the underlying duty cycle loops is performing syscalls (e.g. in sender
   * and receiver threads in Aeron).
   */
  public final class NoOpIdleStrategy implements IdleStrategy
  {
      /**
       * Name to be returned from {@link #alias()}.
       */
      public static final String ALIAS = "noop";
  
      /**
       * As there is no instance state then this object can be used to save on allocation.
       */
      public static final NoOpIdleStrategy INSTANCE = new NoOpIdleStrategy();
  
      /**
       * Create a new instance.
       */
      public NoOpIdleStrategy()
      {
      }
  
      /**
       * <b>Note</b>: this implementation will result in no safepoint poll once inlined.
       * <p>
       * {@inheritDoc}
       */
      public void idle(final int workCount)
      {
      }
  
      /**
       * <b>Note</b>: this implementation will result in no safepoint poll once inlined.
       * <p>
       * {@inheritDoc}
       */
      public void idle()
      {
      }
  
      /**
       * {@inheritDoc}
       */
      public void reset()
      {
      }
  
      /**
       * {@inheritDoc}
       */
      public String alias()
      {
          return ALIAS;
      }
  
      /**
       * {@inheritDoc}
       */
      public String toString()
      {
          return "NoOpIdleStrategy{alias=" + ALIAS + "}";
      }
  }
  