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93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
/*
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* Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_OOPS_OOPHANDLE_INLINE_HPP
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#define SHARE_OOPS_OOPHANDLE_INLINE_HPP
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#include "oops/oopHandle.hpp"
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#include "oops/access.inline.hpp"
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#include "gc/shared/oopStorage.inline.hpp"
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inline oop OopHandle::resolve() const {
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if (_obj == nullptr) {
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return (oop) nullptr;
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} else {
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oop oop = NativeAccess<>::oop_load(_obj);
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assert(oopDesc::is_oop_or_null(oop), "Should be oop: " PTR_FORMAT, p2i(oop));
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return oop;
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}
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}
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inline oop OopHandle::peek() const {
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if (_obj == nullptr) {
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return (oop) nullptr;
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} else {
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oop obj = NativeAccess<AS_NO_KEEPALIVE>::oop_load(_obj);
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assert(oopDesc::is_oop_or_null(obj), "Should be oop: " PTR_FORMAT, p2i(obj));
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return obj;
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}
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}
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inline OopHandle::OopHandle(OopStorage* storage, oop obj) :
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_obj(storage->allocate()) {
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if (_obj == nullptr) {
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vm_exit_out_of_memory(sizeof(oop), OOM_MALLOC_ERROR,
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"Cannot create oop handle");
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}
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assert(oopDesc::is_oop_or_null(obj), "Should be oop: " PTR_FORMAT, p2i(obj));
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NativeAccess<>::oop_store(_obj, obj);
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}
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inline void OopHandle::release(OopStorage* storage) {
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if (_obj != nullptr) {
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// Clear the OopHandle first
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NativeAccess<>::oop_store(_obj, nullptr);
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storage->release(_obj);
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_obj = nullptr;
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}
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}
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inline void OopHandle::replace(oop obj) {
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assert(!is_empty(), "should not use replace");
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assert(oopDesc::is_oop_or_null(obj), "Should be oop: " PTR_FORMAT, p2i(obj));
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NativeAccess<>::oop_store(_obj, obj);
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}
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inline oop OopHandle::xchg(oop new_value) {
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assert(oopDesc::is_oop_or_null(new_value), "Should be oop: " PTR_FORMAT, p2i(new_value));
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oop obj = NativeAccess<MO_SEQ_CST>::oop_atomic_xchg(_obj, new_value);
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assert(oopDesc::is_oop_or_null(obj), "Should be oop: " PTR_FORMAT, p2i(obj));
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return obj;
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}
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inline oop OopHandle::cmpxchg(oop old_value, oop new_value) {
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assert(oopDesc::is_oop_or_null(new_value), "Should be oop: " PTR_FORMAT, p2i(new_value));
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oop obj = NativeAccess<MO_SEQ_CST>::oop_atomic_cmpxchg(_obj, old_value, new_value);
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assert(oopDesc::is_oop_or_null(obj), "Should be oop: " PTR_FORMAT, p2i(obj));
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return obj;
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}
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#endif // SHARE_OOPS_OOPHANDLE_INLINE_HPP
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