1 /*
   2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "memory/allocation.inline.hpp"
  26 #include "memory/padded.hpp"
  27 #include "utilities/debug.hpp"
  28 #include "utilities/globalDefinitions.hpp"
  29 
  30 // Creates an aligned padded array.
  31 // The memory can't be deleted since the raw memory chunk is not returned.
  32 template <class T, MEMFLAGS flags, size_t alignment>
  33 PaddedEnd<T>* PaddedArray<T, flags, alignment>::create_immortal(uint length) {
  34   // Check that the PaddedEnd class works as intended.
  35   STATIC_ASSERT(is_size_aligned_(sizeof(PaddedEnd<T>), alignment));
  36 
  37   // Allocate a chunk of memory large enough to allow for some alignment.
  38   void* chunk = AllocateHeap(length * sizeof(PaddedEnd<T, alignment>) + alignment, flags);
  39 
  40   // Make the initial alignment.
  41   PaddedEnd<T>* aligned_padded_array = (PaddedEnd<T>*)align_pointer_up(chunk, alignment);
  42 
  43   // Call the default constructor for each element.
  44   for (uint i = 0; i < length; i++) {
  45     ::new (&aligned_padded_array[i]) T();
  46   }
  47 
  48   return aligned_padded_array;
  49 }