1 /*
2 * Copyright (c) 2018, 2020, 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 #ifndef SHARE_OOPS_OOPHANDLE_INLINE_HPP
26 #define SHARE_OOPS_OOPHANDLE_INLINE_HPP
27
28 #include "oops/oopHandle.hpp"
29
30 #include "oops/access.inline.hpp"
31 #include "gc/shared/oopStorage.inline.hpp"
32
resolve() const33 inline oop OopHandle::resolve() const {
34 return (_obj == NULL) ? (oop)NULL : NativeAccess<>::oop_load(_obj);
35 }
36
peek() const37 inline oop OopHandle::peek() const {
38 return (_obj == NULL) ? (oop)NULL : NativeAccess<AS_NO_KEEPALIVE>::oop_load(_obj);
39 }
40
OopHandle(OopStorage * storage,oop obj)41 inline OopHandle::OopHandle(OopStorage* storage, oop obj) :
42 _obj(storage->allocate()) {
43 if (_obj == NULL) {
44 vm_exit_out_of_memory(sizeof(oop), OOM_MALLOC_ERROR,
45 "Cannot create oop handle");
46 }
47 NativeAccess<>::oop_store(_obj, obj);
48 }
49
release(OopStorage * storage)50 inline void OopHandle::release(OopStorage* storage) {
51 if (_obj != NULL) {
52 // Clear the OopHandle first
53 NativeAccess<>::oop_store(_obj, (oop)NULL);
54 storage->release(_obj);
55 }
56 }
57
replace(oop obj)58 inline void OopHandle::replace(oop obj) {
59 oop* ptr = ptr_raw();
60 assert(ptr != NULL, "should not use replace");
61 NativeAccess<>::oop_store(ptr, obj);
62 }
63
xchg(oop new_value)64 inline oop OopHandle::xchg(oop new_value) {
65 return NativeAccess<MO_SEQ_CST>::oop_atomic_xchg(_obj, new_value);
66 }
67
68 #endif // SHARE_OOPS_OOPHANDLE_INLINE_HPP
69