1 /*
2  * Copyright (C) 2016 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;
18 
19 import android.os.Looper;
20 
21 import com.android.internal.annotations.VisibleForTesting;
22 
23 /**
24  * Helper providing common assertions.
25  */
26 public class Assert {
27 
28     @VisibleForTesting
29     public static Looper sMainLooper = Looper.getMainLooper();
30 
isMainThread()31     public static void isMainThread() {
32         if (!sMainLooper.isCurrentThread()) {
33             throw new IllegalStateException("should be called from the main thread.");
34         }
35     }
36 
isNotMainThread()37     public static void isNotMainThread() {
38         if (sMainLooper.isCurrentThread()) {
39             throw new IllegalStateException("should not be called from the main thread.");
40         }
41     }
42 }
43