You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
59 lines
2.1 KiB
59 lines
2.1 KiB
/*
|
|
* Copyright (C) 2020 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package com.android.documentsui;
|
|
|
|
import android.os.Looper;
|
|
|
|
/** Class for handler/thread utils. */
|
|
public final class ThreadHelper {
|
|
private ThreadHelper() {
|
|
}
|
|
|
|
static final String MUST_NOT_ON_MAIN_THREAD_MSG =
|
|
"This method should not be called on main thread.";
|
|
static final String MUST_ON_MAIN_THREAD_MSG =
|
|
"This method should only be called on main thread.";
|
|
|
|
/** Verifies that current thread is not the UI thread. */
|
|
public static void assertNotOnMainThread() {
|
|
if (Looper.getMainLooper().getThread() == Thread.currentThread()) {
|
|
fatalAssert(MUST_NOT_ON_MAIN_THREAD_MSG);
|
|
}
|
|
}
|
|
|
|
/** Verifies that current thread is the UI thread. */
|
|
public static void assertOnMainThread() {
|
|
if (Looper.getMainLooper().getThread() != Thread.currentThread()) {
|
|
fatalAssert(MUST_ON_MAIN_THREAD_MSG);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Exceptions thrown in background threads are silently swallowed on Android. Use the
|
|
* uncaught exception handler of the UI thread to force the app to crash.
|
|
*/
|
|
public static void fatalAssert(final String message) {
|
|
crashMainThread(new AssertionError(message));
|
|
}
|
|
|
|
private static void crashMainThread(Throwable t) {
|
|
Thread.UncaughtExceptionHandler uiThreadExceptionHandler =
|
|
Looper.getMainLooper().getThread().getUncaughtExceptionHandler();
|
|
uiThreadExceptionHandler.uncaughtException(Thread.currentThread(), t);
|
|
}
|
|
}
|