react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/JavaScriptContextHolder.java

/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * 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.bridge;

import androidx.annotation.GuardedBy;

/**
 * Wrapper for JavaScriptContext native pointer. CatalystInstanceImpl creates this on demand, and
 * will call clear() before destroying the VM. People who need the raw JavaScriptContext pointer can
 * synchronize on this wrapper object to guarantee that it will not be destroyed.
 */
public class JavaScriptContextHolder {
  @GuardedBy("this")
  private long mContext;

  public JavaScriptContextHolder(long context) {
    mContext = context;
  }

  @GuardedBy("this")
  public long get() {
    return mContext;
  }

  public synchronized void clear() {
    mContext = 0;
  }
}