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.spark.unsafe;
  
  import org.apache.spark.unsafe.memory.MemoryAllocator;
  import org.apache.spark.unsafe.memory.MemoryBlock;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  public class PlatformUtilSuite {
  
    @Test
    public void overlappingCopyMemory() {
      byte[] data = new byte[3 * 1024 * 1024];
      int size = 2 * 1024 * 1024;
      for (int i = 0; i < data.length; ++i) {
        data[i] = (byte)i;
      }
  
      Platform.copyMemory(data, Platform.BYTE_ARRAY_OFFSET, data, Platform.BYTE_ARRAY_OFFSET, size);
      for (int i = 0; i < data.length; ++i) {
        Assert.assertEquals((byte)i, data[i]);
      }
  
      Platform.copyMemory(
          data,
          Platform.BYTE_ARRAY_OFFSET + 1,
          data,
          Platform.BYTE_ARRAY_OFFSET,
          size);
      for (int i = 0; i < size; ++i) {
        Assert.assertEquals((byte)(i + 1), data[i]);
      }
  
      for (int i = 0; i < data.length; ++i) {
        data[i] = (byte)i;
      }
      Platform.copyMemory(
          data,
          Platform.BYTE_ARRAY_OFFSET,
          data,
          Platform.BYTE_ARRAY_OFFSET + 1,
          size);
      for (int i = 0; i < size; ++i) {
        Assert.assertEquals((byte)i, data[i + 1]);
      }
    }
  
    @Test
    public void memoryDebugFillEnabledInTest() {
      Assert.assertTrue(MemoryAllocator.MEMORY_DEBUG_FILL_ENABLED);
      MemoryBlock onheap = MemoryAllocator.HEAP.allocate(1);
      MemoryBlock offheap = MemoryAllocator.UNSAFE.allocate(1);
      Assert.assertEquals(
        Platform.getByte(onheap.getBaseObject(), onheap.getBaseOffset()),
        MemoryAllocator.MEMORY_DEBUG_FILL_CLEAN_VALUE);
      Assert.assertEquals(
        Platform.getByte(offheap.getBaseObject(), offheap.getBaseOffset()),
        MemoryAllocator.MEMORY_DEBUG_FILL_CLEAN_VALUE);
    }
  }
  