content: /*
   * Copyright (C) 2016 The Android Open Source Project
   *
   * 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.Wifi
   */
  
  package com.android.server.wifi;
  
  import android.os.SystemClock;
  /**
   * Wrapper class for time operations. Allows replacement of clock operations for testing.
   */
  public class Clock {
  
      /**
       * Get the current time of the clock in milliseconds.
       *
       * @return Current time in milliseconds.
       */
      public long getWallClockMillis() {
          return System.currentTimeMillis();
      }
  
      /**
       * Returns milliseconds since boot, including time spent in sleep.
       *
       * @return Current time since boot in milliseconds.
       */
      public long getElapsedSinceBootMillis() {
          return SystemClock.elapsedRealtime();
      }
  
     /**
       * Returns nanoseconds since boot, including time spent in sleep.
       *
       * @return Current time since boot in nanoseconds.
       */
      public long getElapsedSinceBootNanos() {
          return SystemClock.elapsedRealtimeNanos();
      }
  
      /**
       * Returns milliseconds since boot, not counting time spent in deep sleep.
       *
       * @return Milliseconds of non-sleep uptime since boot.
       */
      public long getUptimeSinceBootMillis() {
          return SystemClock.uptimeMillis();
      }
  
  }
  