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 17 package com.android.server.wifi; 18 19 import android.os.SystemClock; 20 21 import java.time.Instant; 22 23 import javax.annotation.concurrent.ThreadSafe; 24 25 /** 26 * Wrapper class for time operations. Allows replacement of clock operations for testing. 27 */ 28 @ThreadSafe 29 public class Clock { 30 31 /** 32 * Get the current time of the clock in milliseconds. 33 * 34 * @return Current time in milliseconds. 35 */ getWallClockMillis()36 public long getWallClockMillis() { 37 return System.currentTimeMillis(); 38 } 39 40 /** 41 * Returns milliseconds since boot, including time spent in sleep. 42 * 43 * @return Current time since boot in milliseconds. 44 */ getElapsedSinceBootMillis()45 public long getElapsedSinceBootMillis() { 46 return SystemClock.elapsedRealtime(); 47 } 48 49 /** 50 * Returns nanoseconds since boot, including time spent in sleep. 51 * 52 * @return Current time since boot in nanoseconds. 53 */ getElapsedSinceBootNanos()54 public long getElapsedSinceBootNanos() { 55 return SystemClock.elapsedRealtimeNanos(); 56 } 57 58 /** 59 * Returns milliseconds since boot, not counting time spent in deep sleep. 60 * 61 * @return Milliseconds of non-sleep uptime since boot. 62 */ getUptimeSinceBootMillis()63 public long getUptimeSinceBootMillis() { 64 return SystemClock.uptimeMillis(); 65 } 66 67 /** 68 * Waits a given number of milliseconds (of uptimeMillis) before returning. 69 */ sleep(long ms)70 public void sleep(long ms) { 71 SystemClock.sleep(ms); 72 } 73 getCurrentInstant()74 public Instant getCurrentInstant() { 75 return Instant.now(); 76 } 77 } 78