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/*
* Copyright (c) 2015, 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#ifndef SHARE_GC_Z_ZADDRESS_INLINE_HPP
#define SHARE_GC_Z_ZADDRESS_INLINE_HPP
#include "gc/z/zAddress.hpp"
#include "gc/z/zGlobals.hpp"
#include "utilities/globalDefinitions.hpp"
#include "utilities/macros.hpp"
#include "utilities/powerOfTwo.hpp"
inline bool ZAddress::is_null(uintptr_t value) {
return value == 0;
}
inline bool ZAddress::is_bad(uintptr_t value) {
return value & ZAddressBadMask;
}
inline bool ZAddress::is_good(uintptr_t value) {
return !is_bad(value) && !is_null(value);
}
inline bool ZAddress::is_good_or_null(uintptr_t value) {
// Checking if an address is "not bad" is an optimized version of
// checking if it's "good or null", which eliminates an explicit
// null check. However, the implicit null check only checks that
// the mask bits are zero, not that the entire address is zero.
// This means that an address without mask bits would pass through
// the barrier as if it was null. This should be harmless as such
// addresses should ever be passed through the barrier.
const bool result = !is_bad(value);
assert((is_good(value) || is_null(value)) == result, "Bad address");
return result;
}
inline bool ZAddress::is_weak_bad(uintptr_t value) {
return value & ZAddressWeakBadMask;
}
inline bool ZAddress::is_weak_good(uintptr_t value) {
return !is_weak_bad(value) && !is_null(value);
}
inline bool ZAddress::is_weak_good_or_null(uintptr_t value) {
return !is_weak_bad(value);
}
inline bool ZAddress::is_marked(uintptr_t value) {
return value & ZAddressMetadataMarked;
}
inline bool ZAddress::is_marked_or_null(uintptr_t value) {
return is_marked(value) || is_null(value);
}
inline bool ZAddress::is_finalizable(uintptr_t value) {
return value & ZAddressMetadataFinalizable;
}
inline bool ZAddress::is_finalizable_good(uintptr_t value) {
return is_finalizable(value) && is_good(value ^ ZAddressMetadataFinalizable);
}
inline bool ZAddress::is_remapped(uintptr_t value) {
return value & ZAddressMetadataRemapped;
}
inline bool ZAddress::is_in(uintptr_t value) {
// Check that exactly one non-offset bit is set
if (!is_power_of_2(value & ~ZAddressOffsetMask)) {
return false;
}
// Check that one of the non-finalizable metadata is set
return value & (ZAddressMetadataMask & ~ZAddressMetadataFinalizable);
}
inline uintptr_t ZAddress::offset(uintptr_t value) {
return value & ZAddressOffsetMask;
}
inline uintptr_t ZAddress::good(uintptr_t value) {
return offset(value) | ZAddressGoodMask;
}
inline uintptr_t ZAddress::good_or_null(uintptr_t value) {
return is_null(value) ? 0 : good(value);
}
inline uintptr_t ZAddress::finalizable_good(uintptr_t value) {
return offset(value) | ZAddressMetadataFinalizable | ZAddressGoodMask;
}
inline uintptr_t ZAddress::marked(uintptr_t value) {
return offset(value) | ZAddressMetadataMarked;
}
inline uintptr_t ZAddress::marked0(uintptr_t value) {
return offset(value) | ZAddressMetadataMarked0;
}
inline uintptr_t ZAddress::marked1(uintptr_t value) {
return offset(value) | ZAddressMetadataMarked1;
}
inline uintptr_t ZAddress::remapped(uintptr_t value) {
return offset(value) | ZAddressMetadataRemapped;
}
inline uintptr_t ZAddress::remapped_or_null(uintptr_t value) {
return is_null(value) ? 0 : remapped(value);
}
#endif // SHARE_GC_Z_ZADDRESS_INLINE_HPP
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