1 /*
2 * Copyright (c) 1997, 2018, 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 "precompiled.hpp"
26 #include "oops/access.inline.hpp"
27 #include "oops/objArrayKlass.hpp"
28 #include "oops/objArrayOop.inline.hpp"
29 #include "oops/oop.inline.hpp"
30
atomic_compare_exchange_oop(int index,oop exchange_value,oop compare_value)31 oop objArrayOopDesc::atomic_compare_exchange_oop(int index, oop exchange_value,
32 oop compare_value) {
33 ptrdiff_t offs;
34 if (UseCompressedOops) {
35 offs = objArrayOopDesc::obj_at_offset<narrowOop>(index);
36 } else {
37 offs = objArrayOopDesc::obj_at_offset<oop>(index);
38 }
39 return HeapAccess<IS_ARRAY>::oop_atomic_cmpxchg_at(as_oop(), offs, compare_value, exchange_value);
40 }
41
element_klass()42 Klass* objArrayOopDesc::element_klass() {
43 return ObjArrayKlass::cast(klass())->element_klass();
44 }
45