/*
 * Copyright (C) 2018 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 androidx.test.internal.platform;

import androidx.annotation.RestrictTo;

/**
 * An API to check thread conditions. All classes that implement this API must be thread-safe.
 *
 * @hide
 */
@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP) // used by robolectric
public interface ThreadChecker {
  /**
   * Checks if the current thread is the main thread, otherwise throws.
   *
   * @throws IllegalStateException if current thread is not the main thread.
   */
  void checkMainThread();

  /**
   * Checks if the current thread is not the main thread, otherwise throws.
   *
   * @throws IllegalStateException if current thread is the main thread.
   */
  void checkNotMainThread();
}