react-native/ReactAndroid/src/main/java/com/facebook/react/common/SingleThreadAsserter.java

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * <p>This source code is licensed under the MIT license found in the LICENSE file in the root
 * directory of this source tree.
 */
package com.facebook.react.common;

import com.facebook.infer.annotation.Assertions;
import javax.annotation.Nullable;

/** Simple class for asserting that operations only run on a single thread. */
public class SingleThreadAsserter {
  private @Nullable Thread mThread = null;

  public void assertNow() {
    Thread current = Thread.currentThread();
    if (mThread == null) {
      mThread = current;
    }
    Assertions.assertCondition(mThread == current);
  }
}