content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.arrow.memory;
  
  /**
   * EXPERIMENTAL: a memory allocation that does not come from a BufferAllocator, but rather an
   * outside source (like JNI).
   *
   * <p>To use this, subclass this class and implement {@link #release0()} to free the allocation.
   */
  public abstract class ForeignAllocation {
    private final long memoryAddress;
    private final long size;
  
    /**
     * Create a new AllocationManager representing an imported buffer.
     *
     * @param size The buffer size.
     * @param memoryAddress The buffer address.
     */
    protected ForeignAllocation(long size, long memoryAddress) {
      this.memoryAddress = memoryAddress;
      this.size = size;
    }
  
    /** Get the size of this allocation. */
    public long getSize() {
      return size;
    }
  
    /** Get the address of this allocation. */
    protected long memoryAddress() {
      return memoryAddress;
    }
  
    /** Free this allocation. Will only be called once. */
    protected abstract void release0();
  }
  