Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/share/vm/memory/padded.inline.hpp	Fri May 31 14:32:44 2013 +0200
     1.3 @@ -0,0 +1,49 @@
     1.4 +/*
     1.5 + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    1.23 + * or visit www.oracle.com if you need additional information or have any
    1.24 + * questions.
    1.25 + *
    1.26 + */
    1.27 +
    1.28 +#include "memory/allocation.inline.hpp"
    1.29 +#include "memory/padded.hpp"
    1.30 +#include "utilities/debug.hpp"
    1.31 +#include "utilities/globalDefinitions.hpp"
    1.32 +
    1.33 +// Creates an aligned padded array.
    1.34 +// The memory can't be deleted since the raw memory chunk is not returned.
    1.35 +template <class T, MEMFLAGS flags, size_t alignment>
    1.36 +PaddedEnd<T>* PaddedArray<T, flags, alignment>::create_unfreeable(uint length) {
    1.37 +  // Check that the PaddedEnd class works as intended.
    1.38 +  STATIC_ASSERT(is_size_aligned_(sizeof(PaddedEnd<T>), alignment));
    1.39 +
    1.40 +  // Allocate a chunk of memory large enough to allow for some alignment.
    1.41 +  void* chunk = AllocateHeap(length * sizeof(PaddedEnd<T, alignment>) + alignment, flags);
    1.42 +
    1.43 +  // Make the initial alignment.
    1.44 +  PaddedEnd<T>* aligned_padded_array = (PaddedEnd<T>*)align_pointer_up(chunk, alignment);
    1.45 +
    1.46 +  // Call the default constructor for each element.
    1.47 +  for (uint i = 0; i < length; i++) {
    1.48 +    ::new (&aligned_padded_array[i]) T();
    1.49 +  }
    1.50 +
    1.51 +  return aligned_padded_array;
    1.52 +}