43 lines
1.3 KiB
Java
43 lines
1.3 KiB
Java
/*
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* Copyright (C) 2020 The Dagger Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dagger.hilt.android.internal;
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import android.os.Looper;
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/** Thread utility methods. */
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public final class ThreadUtil {
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private static Thread mainThread;
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private ThreadUtil() {}
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/** Returns true if the current thread is the Main thread. */
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public static boolean isMainThread() {
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if (mainThread == null) {
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mainThread = Looper.getMainLooper().getThread();
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}
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return Thread.currentThread() == mainThread;
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}
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/** Checks that the current thread is the Main thread. Otherwise throws an exception. */
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public static void ensureMainThread() {
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if (!isMainThread()) {
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throw new IllegalStateException("Must be called on the Main thread.");
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}
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}
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}
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