ThreadUtil.java revision a3eccfee788c3ac3c831a443b085b141b39bb63d 
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
17package com.android.server.telecom;
18
19import android.os.Looper;
20import android.telecom.Log;
21
22/**
23 * Helper methods to deal with threading related tasks.
24 */
25public final class ThreadUtil {
26    private static final String TAG = ThreadUtil.class.getSimpleName();
27
28    private ThreadUtil() {}
29
30    /** @return whether this method is being called from the main (UI) thread. */
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     */
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     */
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