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