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  * Wrapper class for time operations. Allows replacement of clock operations for testing.
22  */
23 public class Clock {
24 
25     /**
26      * Get the current time of the clock in milliseconds.
27      *
28      * @return Current time in milliseconds.
29      */
getWallClockMillis()30     public long getWallClockMillis() {
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      */
getElapsedSinceBootMillis()39     public long getElapsedSinceBootMillis() {
40         return SystemClock.elapsedRealtime();
41     }
42 
43    /**
44      * Returns nanoseconds since boot, including time spent in sleep.
45      *
46      * @return Current time since boot in nanoseconds.
47      */
getElapsedSinceBootNanos()48     public long getElapsedSinceBootNanos() {
49         return SystemClock.elapsedRealtimeNanos();
50     }
51 
52     /**
53      * Returns milliseconds since boot, not counting time spent in deep sleep.
54      *
55      * @return Milliseconds of non-sleep uptime since boot.
56      */
getUptimeSinceBootMillis()57     public long getUptimeSinceBootMillis() {
58         return SystemClock.uptimeMillis();
59     }
60 
61 }
62