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8220595: ZGC: Introduce ZAttachedArray

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Reviewed-by: stefank, eosterlund
This commit is contained in:
Per Lidén 2019-03-18 11:50:40 +01:00
parent dd412e66c5
commit c62f53a576
2 changed files with 109 additions and 0 deletions
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46
src/hotspot/share/gc/z/zAttachedArray.hpp Normal file
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/*
* Copyright (c) 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_ZATTACHEDARRAY_HPP
#define SHARE_GC_Z_ZATTACHEDARRAY_HPP
#include "utilities/globalDefinitions.hpp"
template <typename ObjectT, typename ArrayT>
class ZAttachedArray {
private:
const uint32_t _length;
static size_t object_size();
public:
static void* alloc(size_t length);
static void free(ObjectT* obj);
ZAttachedArray(size_t length);
uint32_t length() const;
ArrayT* operator()(const ObjectT* obj) const;
};
#endif // SHARE_GC_Z_ZATTACHEDARRAY_HPP

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src/hotspot/share/gc/z/zAttachedArray.inline.hpp Normal file
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/*
* Copyright (c) 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_ZATTACHEDARRAY_INLINE_HPP
#define SHARE_GC_Z_ZATTACHEDARRAY_INLINE_HPP
#include "gc/z/zAttachedArray.hpp"
#include "memory/allocation.hpp"
#include "utilities/align.hpp"
template <typename ObjectT, typename ArrayT>
inline size_t ZAttachedArray<ObjectT, ArrayT>::object_size() {
return align_up(sizeof(ObjectT), sizeof(ArrayT));
}
template <typename ObjectT, typename ArrayT>
inline void* ZAttachedArray<ObjectT, ArrayT>::alloc(size_t length) {
const size_t array_size = sizeof(ArrayT) * length;
char* const addr = AllocateHeap(object_size() + array_size, mtGC);
::new (addr + object_size()) ArrayT[length];
return addr;
}
template <typename ObjectT, typename ArrayT>
inline void ZAttachedArray<ObjectT, ArrayT>::free(ObjectT* obj) {
FreeHeap(obj);
}
template <typename ObjectT, typename ArrayT>
inline ZAttachedArray<ObjectT, ArrayT>::ZAttachedArray(size_t length) :
_length(length) {}
template <typename ObjectT, typename ArrayT>
inline uint32_t ZAttachedArray<ObjectT, ArrayT>::length() const {
return _length;
}
template <typename ObjectT, typename ArrayT>
inline ArrayT* ZAttachedArray<ObjectT, ArrayT>::operator()(const ObjectT* obj) const {
return reinterpret_cast<ArrayT*>(reinterpret_cast<uintptr_t>(obj) + object_size());
}
#endif // SHARE_GC_Z_ZATTACHEDARRAY_INLINE_HPP