1 /*
2  * Copyright (C) 2017 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
15  */
16 
17 package com.android.systemui.util.wakelock;
18 
19 import android.content.Context;
20 import android.os.PowerManager;
21 import android.support.annotation.VisibleForTesting;
22 
23 /** WakeLock wrapper for testability */
24 public interface WakeLock {
25 
26     /** @see android.os.PowerManager.WakeLock#acquire() */
acquire()27     void acquire();
28 
29     /** @see android.os.PowerManager.WakeLock#release() */
release()30     void release();
31 
32     /** @see android.os.PowerManager.WakeLock#wrap(Runnable) */
wrap(Runnable r)33     Runnable wrap(Runnable r);
34 
createPartial(Context context, String tag)35     static WakeLock createPartial(Context context, String tag) {
36         return wrap(createPartialInner(context, tag));
37     }
38 
39     @VisibleForTesting
createPartialInner(Context context, String tag)40     static PowerManager.WakeLock createPartialInner(Context context, String tag) {
41         return context.getSystemService(PowerManager.class)
42                     .newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, tag);
43     }
44 
wrapImpl(WakeLock w, Runnable r)45     static Runnable wrapImpl(WakeLock w, Runnable r) {
46         w.acquire();
47         return () -> {
48             try {
49                 r.run();
50             } finally {
51                 w.release();
52             }
53         };
54     }
55 
56     static WakeLock wrap(final PowerManager.WakeLock inner) {
57         return new WakeLock() {
58             /** @see PowerManager.WakeLock#acquire() */
59             public void acquire() {
60                 inner.acquire();
61             }
62 
63             /** @see PowerManager.WakeLock#release() */
64             public void release() {
65                 inner.release();
66             }
67 
68             /** @see PowerManager.WakeLock#wrap(Runnable) */
69             public Runnable wrap(Runnable runnable) {
70                 return wrapImpl(this, runnable);
71             }
72         };
73     }
74 }