/*

 * Copyright (c) 1997, 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.

 *

 */

#include "precompiled.hpp"

#include "oops/access.inline.hpp"

#include "oops/objArrayKlass.hpp"

#include "oops/objArrayOop.inline.hpp"

#include "oops/oop.inline.hpp"

oop objArrayOopDesc::atomic_compare_exchange_oop(int index, oop exchange_value,

                                                 oop compare_value) {

  ptrdiff_t offs;

  if (UseCompressedOops) {

    offs = objArrayOopDesc::obj_at_offset<narrowOop>(index);

  } else {

    offs = objArrayOopDesc::obj_at_offset<oop>(index);

  }

  return HeapAccess<IS_ARRAY>::oop_atomic_cmpxchg_at(exchange_value, as_oop(), offs, compare_value);

}

Klass* objArrayOopDesc::element_klass() {

  return ObjArrayKlass::cast(klass())->element_klass();

}