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25a5ed94d6
This is a weak pointer that integrates with the garbage collector. It has a number of differences compared to AK::WeakPtr, including: - The "control block" is allocated from a well-packed WeakBlock owned by the GC heap, not just a generic malloc allocation. - Pointers to dead cells are nulled out by the garbage collector immediately before running destructors. - It works on any GC::Cell derived type, meaning you don't have to inherit from AK::Weakable for the ability to be weakly referenced. - The Weak always points to a control block, even when "null" (it then points to a null WeakImpl), which means one less null check when chasing pointers.
37 lines
573 B
C++
37 lines
573 B
C++
/*
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* Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Types.h>
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#include <LibGC/Export.h>
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namespace GC {
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class Cell;
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class CellAllocator;
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class DeferGC;
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class ForeignCell;
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class RootImpl;
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class Heap;
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class HeapBlock;
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class NanBoxedValue;
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class WeakContainer;
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class WeakImpl;
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template<typename T>
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class Function;
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template<class T>
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class Root;
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template<class T, size_t inline_capacity = 0>
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class ConservativeVector;
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template<class T, size_t inline_capacity = 0>
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class RootVector;
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}
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