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;
  
  /**
   * Functional interface for return the current time as system-wide monotonic tick of 1 nanosecond precision.
   */
  @FunctionalInterface
  public interface NanoClock
  {
      /**
       * The number of ticks in nanoseconds the clock has advanced since starting.
       * <p>
       * This method can only be used to measure elapsed time and is not related to any other notion of system or
       * wall-clock time. The value returned represents nanoseconds since some fixed but arbitrary origin time
       * (perhaps in the future, so values may be negative). The same origin is used by all invocations of this method
       * in an instance of a Java virtual machine; other virtual machine instances are likely to use a different origin.
       *
       * @return number of ticks in nanoseconds the clock has advanced since starting.
       * @see System#nanoTime()
       */
      long nanoTime();
  }
  