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https://github.com/Samsung/escargot.git
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d2a17f09cd
* add shrink function to resize finalizer list * shrink the list when about an half of the list is empty Signed-off-by: HyukWoo Park <hyukwoo.park@samsung.com>
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
/*
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* Copyright (c) 2021-present Samsung Electronics Co., Ltd
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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* USA
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*/
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#ifndef __EscargotFinalizationRegistryObject__
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#define __EscargotFinalizationRegistryObject__
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#include "runtime/Object.h"
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namespace Escargot {
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class FinalizationRegistryObject : public DerivedObject {
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friend class CleanupSomeJob;
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public:
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struct FinalizationRegistryObjectItem : public gc {
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#if !defined(NDEBUG)
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friend int getValidValueInFinalizationRegistryObjectItem(void* ptr, GC_mark_custom_result* arr);
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#endif
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Object* weakRefTarget;
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EncodedValue heldValue;
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FinalizationRegistryObject* source;
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Optional<Object*> unregisterToken;
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void reset()
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{
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weakRefTarget = nullptr;
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heldValue = Value();
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source = nullptr;
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unregisterToken.reset();
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}
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void* operator new(size_t size);
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void* operator new[](size_t size) = delete;
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};
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typedef Vector<FinalizationRegistryObjectItem*, GCUtil::gc_malloc_allocator<FinalizationRegistryObjectItem*>> FinalizationRegistryObjectCells;
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explicit FinalizationRegistryObject(ExecutionState& state, Object* cleanupCallback, Context* realm);
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explicit FinalizationRegistryObject(ExecutionState& state, Object* proto, Object* cleanupCallback, Context* realm);
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virtual bool isFinalizationRegistryObject() const
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{
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return true;
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}
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void setCell(Object* weakRefTarget, const Value& heldValue, Optional<Object*> unregisterToken);
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bool deleteCell(Object* unregisterToken);
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bool deleteCellOnly(FinalizationRegistryObjectItem* item);
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void cleanupSome(ExecutionState& state, Optional<Object*> callback);
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void* operator new(size_t size);
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void* operator new[](size_t size) = delete;
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private:
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static void finalizer(Object* self, void* data);
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void tryToShrinkCells();
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Optional<Object*> m_cleanupCallback;
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Context* m_realm;
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FinalizationRegistryObjectCells m_cells;
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size_t m_deletedCellCount;
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};
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} // namespace Escargot
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#endif
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