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c2988a7dd5
Instead, smuggle it in as a `void*` private data and let Javascript aware code cast out that pointer to a VM&. In order to make this split, rename JS::Cell to JS::CellImpl. Once we have a LibGC, this will become GC::Cell. CellImpl then has no specific knowledge of the VM& and Realm&. That knowledge is instead put into JS::Cell, which inherits from CellImpl. JS::Cell is responsible for JavaScript's realm initialization, as well as converting of the void* private data to what it knows should be the VM&.
82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2022, Linus Groh <linusg@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/HashMap.h>
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#include <AK/IntrusiveList.h>
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#include <AK/Vector.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Heap/CellImpl.h>
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#include <LibJS/Heap/HeapRoot.h>
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namespace JS {
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class MarkedVectorBase {
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public:
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virtual void gather_roots(HashMap<CellImpl*, JS::HeapRoot>&) const = 0;
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protected:
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explicit MarkedVectorBase(Heap&);
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~MarkedVectorBase();
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MarkedVectorBase& operator=(MarkedVectorBase const&);
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Heap* m_heap { nullptr };
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IntrusiveListNode<MarkedVectorBase> m_list_node;
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public:
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using List = IntrusiveList<&MarkedVectorBase::m_list_node>;
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};
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template<typename T, size_t inline_capacity>
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class MarkedVector final
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: public MarkedVectorBase
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, public Vector<T, inline_capacity> {
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public:
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explicit MarkedVector(Heap& heap)
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: MarkedVectorBase(heap)
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{
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}
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virtual ~MarkedVector() = default;
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MarkedVector(MarkedVector const& other)
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: MarkedVectorBase(*other.m_heap)
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, Vector<T, inline_capacity>(other)
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{
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}
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MarkedVector(MarkedVector&& other)
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: MarkedVectorBase(*other.m_heap)
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, Vector<T, inline_capacity>(move(static_cast<Vector<T, inline_capacity>&>(other)))
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{
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}
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MarkedVector& operator=(MarkedVector const& other)
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{
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Vector<T, inline_capacity>::operator=(other);
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MarkedVectorBase::operator=(other);
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return *this;
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}
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virtual void gather_roots(HashMap<CellImpl*, JS::HeapRoot>& roots) const override
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{
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for (auto& value : *this) {
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if constexpr (IsSame<Value, T>) {
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if (value.is_cell())
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roots.set(&const_cast<T&>(value).as_cell(), HeapRoot { .type = HeapRoot::Type::MarkedVector });
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} else {
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roots.set(value, HeapRoot { .type = HeapRoot::Type::MarkedVector });
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}
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}
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}
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};
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}
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