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      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() */
     27     void acquire();
     28 
     29     /** @see android.os.PowerManager.WakeLock#release() */
     30     void release();
     31 
     32     /** @see android.os.PowerManager.WakeLock#wrap(Runnable) */
     33     Runnable wrap(Runnable r);
     34 
     35     static WakeLock createPartial(Context context, String tag) {
     36         return wrap(createPartialInner(context, tag));
     37     }
     38 
     39     @VisibleForTesting
     40     static PowerManager.WakeLock createPartialInner(Context context, String tag) {
     41         return context.getSystemService(PowerManager.class)
     42                     .newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, tag);
     43     }
     44 
     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 }