1 /*
2  * Copyright (C) 2023 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.providers.media.photopicker.util;
18 
19 import android.os.Looper;
20 
21 /**
22  * Provide the utility methods to handle thread.
23  */
24 public class ThreadUtils {
25     /**
26      * Assert if the current {@link Thread} is the {@link androidx.annotation.MainThread}.
27      */
assertMainThread()28     public static void assertMainThread() {
29         if (Looper.getMainLooper().isCurrentThread()) {
30             return;
31         }
32         throw new IllegalStateException("Must be called from the Main thread. Current thread: "
33                 + Thread.currentThread());
34     }
35 
36     /**
37      * Assert if the current {@link Thread} is NOT the {@link androidx.annotation.MainThread}.
38      */
assertNonMainThread()39     public static void assertNonMainThread() {
40         if (Looper.getMainLooper().isCurrentThread()) {
41             throw new IllegalStateException("Must NOT be called from the Main thread."
42                     + " Current thread: " + Thread.currentThread());
43         }
44     }
45 }
46