content: /*
   * 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();
  }
  