/*

 * Copyright (c) 2001, 2018, 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.

 *

 */

#ifndef SHARE_VM_GC_SHARED_COLLECTEDHEAP_INLINE_HPP

#define SHARE_VM_GC_SHARED_COLLECTEDHEAP_INLINE_HPP

#include "gc/shared/collectedHeap.hpp"

#include "oops/oop.inline.hpp"

#include "utilities/align.hpp"

inline HeapWord* CollectedHeap::align_allocation_or_fail(HeapWord* addr,

                                                         HeapWord* end,

                                                         unsigned short alignment_in_bytes) {

  if (alignment_in_bytes <= ObjectAlignmentInBytes) {

    return addr;

  }

  assert(is_aligned(addr, HeapWordSize),

         "Address " PTR_FORMAT " is not properly aligned.", p2i(addr));

  assert(is_aligned(alignment_in_bytes, HeapWordSize),

         "Alignment size %u is incorrect.", alignment_in_bytes);

  HeapWord* new_addr = align_up(addr, alignment_in_bytes);

  size_t padding = pointer_delta(new_addr, addr);

  if (padding == 0) {

    return addr;

  }

  if (padding < CollectedHeap::min_fill_size()) {

    padding += alignment_in_bytes / HeapWordSize;

    assert(padding >= CollectedHeap::min_fill_size(),

           "alignment_in_bytes %u is expect to be larger "

           "than the minimum object size", alignment_in_bytes);

    new_addr = addr + padding;

  }

  assert(new_addr > addr, "Unexpected arithmetic overflow "

         PTR_FORMAT " not greater than " PTR_FORMAT, p2i(new_addr), p2i(addr));

  if(new_addr < end) {

    CollectedHeap::fill_with_object(addr, padding);

    return new_addr;

  } else {

    return NULL;

  }

}

#endif // SHARE_VM_GC_SHARED_COLLECTEDHEAP_INLINE_HPP