blob: 334cca317c3008cc6ce31d262b026bb079abef89 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/*
* Copyright (C) 2018 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.
*/
package com.android.internal.os;
import android.os.SystemClock;
import com.android.internal.annotations.GuardedBy;
import com.android.internal.annotations.VisibleForTesting;
import java.util.ArrayList;
/**
* Stores the device state (e.g. charging/on battery, screen on/off) to be shared with
* the System Server telemetry services.
*
* @hide
*/
public class CachedDeviceState {
private volatile boolean mScreenInteractive;
private volatile boolean mCharging;
private final Object mStopwatchesLock = new Object();
@GuardedBy("mStopwatchLock")
private final ArrayList<TimeInStateStopwatch> mOnBatteryStopwatches = new ArrayList<>();
public CachedDeviceState() {
mCharging = true;
mScreenInteractive = false;
}
@VisibleForTesting
public CachedDeviceState(boolean isCharging, boolean isScreenInteractive) {
mCharging = isCharging;
mScreenInteractive = isScreenInteractive;
}
public void setScreenInteractive(boolean screenInteractive) {
mScreenInteractive = screenInteractive;
}
public void setCharging(boolean charging) {
if (mCharging != charging) {
mCharging = charging;
updateStopwatches(/* shouldStart= */ !charging);
}
}
private void updateStopwatches(boolean shouldStart) {
synchronized (mStopwatchesLock) {
final int size = mOnBatteryStopwatches.size();
for (int i = 0; i < size; i++) {
if (shouldStart) {
mOnBatteryStopwatches.get(i).start();
} else {
mOnBatteryStopwatches.get(i).stop();
}
}
}
}
public Readonly getReadonlyClient() {
return new CachedDeviceState.Readonly();
}
/**
* Allows for only a readonly access to the device state.
*/
public class Readonly {
public boolean isCharging() {
return mCharging;
}
public boolean isScreenInteractive() {
return mScreenInteractive;
}
/** Creates a {@link TimeInStateStopwatch stopwatch} that tracks the time on battery. */
public TimeInStateStopwatch createTimeOnBatteryStopwatch() {
synchronized (mStopwatchesLock) {
final TimeInStateStopwatch stopwatch = new TimeInStateStopwatch();
mOnBatteryStopwatches.add(stopwatch);
if (!mCharging) {
stopwatch.start();
}
return stopwatch;
}
}
}
/** Tracks the time the device spent in a given state. */
public class TimeInStateStopwatch implements AutoCloseable {
private final Object mLock = new Object();
@GuardedBy("mLock")
private long mStartTimeMillis;
@GuardedBy("mLock")
private long mTotalTimeMillis;
/** Returns the time in state since the last call to {@link TimeInStateStopwatch#reset}. */
public long getMillis() {
synchronized (mLock) {
return mTotalTimeMillis + elapsedTime();
}
}
/** Resets the time in state to 0 without stopping the timer if it's started. */
public void reset() {
synchronized (mLock) {
mTotalTimeMillis = 0;
mStartTimeMillis = isRunning() ? SystemClock.elapsedRealtime() : 0;
}
}
private void start() {
synchronized (mLock) {
if (!isRunning()) {
mStartTimeMillis = SystemClock.elapsedRealtime();
}
}
}
private void stop() {
synchronized (mLock) {
if (isRunning()) {
mTotalTimeMillis += elapsedTime();
mStartTimeMillis = 0;
}
}
}
private long elapsedTime() {
return isRunning() ? SystemClock.elapsedRealtime() - mStartTimeMillis : 0;
}
@VisibleForTesting
public boolean isRunning() {
return mStartTimeMillis > 0;
}
@Override
public void close() {
synchronized (mStopwatchesLock) {
mOnBatteryStopwatches.remove(this);
}
}
}
}
|
