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 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     */
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     */
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     */
57    public long getUptimeSinceBootMillis() {
58        return SystemClock.uptimeMillis();
59    }
60
61}
62