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Java example source code file (padded.inline.hpp)

This example Java source code file (padded.inline.hpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

allocateheap, memflags, paddedarray, paddedend, static_assert

The padded.inline.hpp Java example source code

/*
 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#include "memory/allocation.inline.hpp"
#include "memory/padded.hpp"
#include "utilities/debug.hpp"
#include "utilities/globalDefinitions.hpp"

// Creates an aligned padded array.
// The memory can't be deleted since the raw memory chunk is not returned.
template <class T, MEMFLAGS flags, size_t alignment>
PaddedEnd<T>* PaddedArray::create_unfreeable(uint length) {
  // Check that the PaddedEnd class works as intended.
  STATIC_ASSERT(is_size_aligned_(sizeof(PaddedEnd<T>), alignment));

  // Allocate a chunk of memory large enough to allow for some alignment.
  void* chunk = AllocateHeap(length * sizeof(PaddedEnd<T, alignment>) + alignment, flags);

  // Make the initial alignment.
  PaddedEnd<T>* aligned_padded_array = (PaddedEnd*)align_pointer_up(chunk, alignment);

  // Call the default constructor for each element.
  for (uint i = 0; i < length; i++) {
    ::new (&aligned_padded_array[i]) T();
  }

  return aligned_padded_array;
}

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