1/* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License.Wifi 15 */ 16 17package com.android.server.wifi; 18 19import android.os.SystemClock; 20/** 21 * Wrapper class for time operations. Allows replacement of clock operations for testing. 22 */ 23public class Clock { 24 25 /** 26 * Get the current time of the clock in milliseconds. 27 * 28 * @return Current time in milliseconds. 29 */ 30 public long currentTimeMillis() { 31 return System.currentTimeMillis(); 32 } 33 34 /** 35 * Returns milliseconds since boot, including time spent in sleep. 36 * 37 * @return Current time since boot in milliseconds. 38 */ 39 public long elapsedRealtime() { 40 return SystemClock.elapsedRealtime(); 41 } 42 43 /** 44 * Returns the current timestamp of the most precise timer available on the local system, in 45 * nanoseconds. 46 * 47 * @return Current time in nanoseconds. 48 */ 49 public long nanoTime() { 50 return System.nanoTime(); 51 } 52 53 /** 54 * Returns nanoseconds since boot, including time spent in sleep. 55 * 56 * @return Current time since boot in nanoseconds. 57 */ 58 public long elapsedRealtimeNanos() { 59 return SystemClock.elapsedRealtimeNanos(); 60 } 61} 62