/*
* Copyright (c) 2017, 2019, 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
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*/
#ifndef SHARE_JFR_LEAKPROFILER_UTILITIES_UNIFIEDOOP_HPP
#define SHARE_JFR_LEAKPROFILER_UTILITIES_UNIFIEDOOP_HPP
#include "oops/oop.inline.hpp"
class UnifiedOop : public AllStatic {
public:
static const bool is_narrow(const oop* ref) {
assert(ref != NULL, "invariant");
return 1 == (((u8)ref) & 1);
}
static const oop* decode(const oop* ref) {
assert(ref != NULL, "invariant");
return is_narrow(ref) ? (const oop*)(((u8)ref) & ~1) : ref;
}
static const oop* encode(narrowOop* ref) {
assert(ref != NULL, "invariant");
return (const oop*)((u8)ref | 1);
}
static oop dereference(const oop* ref) {
assert(ref != NULL, "invariant");
return is_narrow(ref) ?
(oop)RawAccess<>::oop_load((narrowOop*)decode(ref)) :
(oop)RawAccess<>::oop_load(const_cast<oop*>(ref));
}
};
#endif // SHARE_JFR_LEAKPROFILER_UTILITIES_UNIFIEDOOP_HPP