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.cassandra.db.marshal;
  
  import java.io.Closeable;
  import java.nio.ByteBuffer;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.cassandra.utils.concurrent.ImmediateFuture;
  import org.apache.cassandra.utils.concurrent.OpOrder;
  import org.apache.cassandra.utils.memory.MemoryUtil;
  import org.apache.cassandra.utils.memory.NativeAllocator;
  import org.apache.cassandra.utils.memory.NativePool;
  
  /**
   * A primitive NativeData allocator is used for test purposes only
   * It releases memory only when releaseMemory() or close() are called
   */
  public class TestNativeDataAllocator implements NativeDataAllocator, Closeable
  {
      private final NativePool nativePool = new NativePool(0, 10 * 1024 * 1024, 1.0f,
                                                           () -> ImmediateFuture.success(true));
      private NativeAllocator nativeAllocator = nativePool.newAllocator("test");
      private final OpOrder order = new OpOrder();
  
      @Override
      public NativeData allocateBasedOnBuffer(ByteBuffer data)
      {
          try(OpOrder.Group group = order.start())
          {
              long address = nativeAllocator.allocate(data.remaining(), group);
              MemoryUtil.setBytes(address, data);
              return new AddressBasedNativeData(address, data.remaining());
          }
      }
  
      public void releaseMemory() {
          nativeAllocator.setDiscarding();
          nativeAllocator.setDiscarded();
          nativeAllocator = nativePool.newAllocator("test");
      }
  
      public void close() {
          nativeAllocator.setDiscarding();
          nativeAllocator.setDiscarded();
          try
          {
              nativePool.shutdownAndWait(5, TimeUnit.SECONDS);
          }
          catch (Exception e)
          {
              throw new RuntimeException(e);
          }
      }
  
  }
  