1 /*
2  * Copyright (C) 2020 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.settings.network.ims;
18 
19 import java.util.concurrent.Semaphore;
20 import java.util.concurrent.TimeUnit;
21 import java.util.concurrent.atomic.AtomicInteger;
22 import java.util.function.Consumer;
23 
24 class IntegerConsumer extends Semaphore implements Consumer<Integer> {
25 
26     private static final String TAG = "IntegerConsumer";
27 
IntegerConsumer()28     IntegerConsumer() {
29         super(0);
30         mValue = new AtomicInteger();
31     }
32 
33     private volatile AtomicInteger mValue;
34 
35     /**
36      * Get boolean value reported from callback
37      *
38      * @param timeout callback waiting time in milliseconds
39      * @return int value reported
40      * @throws InterruptedException when thread get interrupted
41      */
get(long timeout)42     int get(long timeout) throws InterruptedException {
43         tryAcquire(timeout, TimeUnit.MILLISECONDS);
44         return mValue.get();
45     }
46 
47     /**
48      * Implementation of {@link Consumer#accept(Integer)}
49      *
50      * @param value int reported from {@link Consumer#accept(Integer)}
51      */
accept(Integer value)52     public void accept(Integer value) {
53         if (value != null) {
54             mValue.set(value.intValue());
55         }
56         release();
57     }
58 }
59