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77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
/*
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* Copyright (c) 2026, 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_AOT_AOTGROWABLEARRAY_HPP
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#define SHARE_AOT_AOTGROWABLEARRAY_HPP
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#include <memory/metaspaceClosureType.hpp>
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#include <utilities/growableArray.hpp>
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class AOTGrowableArrayHelper {
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public:
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static void deallocate(void* mem);
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};
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// An AOTGrowableArray<T> provides the same functionality as a GrowableArray<T> that
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// uses the C heap allocator. In addition, AOTGrowableArray<T> can be iterated with
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// MetaspaceClosure. This type should be used for growable arrays that need to be
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// stored in the AOT cache. See ModuleEntry::_reads for an example.
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template <typename E>
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class AOTGrowableArray : public GrowableArrayWithAllocator<E, AOTGrowableArray<E>> {
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friend class VMStructs;
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friend class GrowableArrayWithAllocator<E, AOTGrowableArray>;
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static E* allocate(int max, MemTag mem_tag) {
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return (E*)GrowableArrayCHeapAllocator::allocate(max, sizeof(E), mem_tag);
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}
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E* allocate() {
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return allocate(this->_capacity, mtClass);
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}
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void deallocate(E* mem) {
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#if INCLUDE_CDS
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AOTGrowableArrayHelper::deallocate(mem);
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#else
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GrowableArrayCHeapAllocator::deallocate(mem);
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#endif
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}
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public:
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AOTGrowableArray(int initial_capacity, MemTag mem_tag) :
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GrowableArrayWithAllocator<E, AOTGrowableArray>(
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allocate(initial_capacity, mem_tag),
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initial_capacity) {}
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AOTGrowableArray() : AOTGrowableArray(0, mtClassShared) {}
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// methods required by MetaspaceClosure
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void metaspace_pointers_do(MetaspaceClosure* it);
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int size_in_heapwords() const { return (int)heap_word_size(sizeof(*this)); }
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MetaspaceClosureType type() const { return MetaspaceClosureType::GrowableArrayType; }
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static bool is_read_only_by_default() { return false; }
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};
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#endif // SHARE_AOT_AOTGROWABLEARRAY_HPP
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