1 /*
2  * Copyright 2014, 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.server.telecom;
18 
19 import android.os.Looper;
20 import android.telecom.Log;
21 
22 /**
23  * Helper methods to deal with threading related tasks.
24  */
25 public final class ThreadUtil {
26     private static final String TAG = ThreadUtil.class.getSimpleName();
27 
ThreadUtil()28     private ThreadUtil() {}
29 
30     /** @return whether this method is being called from the main (UI) thread. */
isOnMainThread()31     public static boolean isOnMainThread() {
32         return Looper.getMainLooper() == Looper.myLooper();
33     }
34 
35     /**
36      * Checks that this is being executed on the main thread. If not, a message is logged at
37      * WTF-level priority.
38      */
checkOnMainThread()39     public static void checkOnMainThread() {
40         if (!isOnMainThread()) {
41             Log.wtf(TAG, new IllegalStateException(), "Must be on the main thread!");
42         }
43     }
44 
45     /**
46      * Checks that this is not being executed on the main thread. If so, a message is logged at
47      * WTF-level priority.
48      */
checkNotOnMainThread()49     public static void checkNotOnMainThread() {
50         if (isOnMainThread()) {
51             Log.wtf(TAG, new IllegalStateException(), "Must not be on the main thread!");
52         }
53     }
54 }
55