8220595: ZGC: Introduce ZAttachedArray
Reviewed-by: stefank, eosterlund
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src/hotspot/share/gc/z/zAttachedArray.hpp
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46
src/hotspot/share/gc/z/zAttachedArray.hpp
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/*
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* Copyright (c) 2019, 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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#ifndef SHARE_GC_Z_ZATTACHEDARRAY_HPP
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#define SHARE_GC_Z_ZATTACHEDARRAY_HPP
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#include "utilities/globalDefinitions.hpp"
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template <typename ObjectT, typename ArrayT>
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class ZAttachedArray {
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private:
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const uint32_t _length;
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static size_t object_size();
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public:
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static void* alloc(size_t length);
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static void free(ObjectT* obj);
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ZAttachedArray(size_t length);
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uint32_t length() const;
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ArrayT* operator()(const ObjectT* obj) const;
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};
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#endif // SHARE_GC_Z_ZATTACHEDARRAY_HPP
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63
src/hotspot/share/gc/z/zAttachedArray.inline.hpp
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src/hotspot/share/gc/z/zAttachedArray.inline.hpp
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/*
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* Copyright (c) 2019, 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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#ifndef SHARE_GC_Z_ZATTACHEDARRAY_INLINE_HPP
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#define SHARE_GC_Z_ZATTACHEDARRAY_INLINE_HPP
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#include "gc/z/zAttachedArray.hpp"
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#include "memory/allocation.hpp"
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#include "utilities/align.hpp"
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template <typename ObjectT, typename ArrayT>
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inline size_t ZAttachedArray<ObjectT, ArrayT>::object_size() {
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return align_up(sizeof(ObjectT), sizeof(ArrayT));
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}
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template <typename ObjectT, typename ArrayT>
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inline void* ZAttachedArray<ObjectT, ArrayT>::alloc(size_t length) {
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const size_t array_size = sizeof(ArrayT) * length;
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char* const addr = AllocateHeap(object_size() + array_size, mtGC);
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::new (addr + object_size()) ArrayT[length];
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return addr;
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}
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template <typename ObjectT, typename ArrayT>
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inline void ZAttachedArray<ObjectT, ArrayT>::free(ObjectT* obj) {
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FreeHeap(obj);
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}
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template <typename ObjectT, typename ArrayT>
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inline ZAttachedArray<ObjectT, ArrayT>::ZAttachedArray(size_t length) :
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_length(length) {}
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template <typename ObjectT, typename ArrayT>
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inline uint32_t ZAttachedArray<ObjectT, ArrayT>::length() const {
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return _length;
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}
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template <typename ObjectT, typename ArrayT>
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inline ArrayT* ZAttachedArray<ObjectT, ArrayT>::operator()(const ObjectT* obj) const {
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return reinterpret_cast<ArrayT*>(reinterpret_cast<uintptr_t>(obj) + object_size());
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}
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#endif // SHARE_GC_Z_ZATTACHEDARRAY_INLINE_HPP
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