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_unfreeable(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 }