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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&.
54 lines
993 B
C++
54 lines
993 B
C++
/*
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* Copyright (c) 2020-2024, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2020-2023, the SerenityOS developers.
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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 <LibJS/Forward.h>
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namespace JS {
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class HeapBase {
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AK_MAKE_NONCOPYABLE(HeapBase);
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AK_MAKE_NONMOVABLE(HeapBase);
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public:
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void* private_data() { return m_private_data; }
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protected:
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explicit HeapBase(void* private_data)
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: m_private_data(private_data)
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{
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}
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void* m_private_data;
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};
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class HeapBlockBase {
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AK_MAKE_NONMOVABLE(HeapBlockBase);
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AK_MAKE_NONCOPYABLE(HeapBlockBase);
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public:
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static size_t block_size;
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static HeapBlockBase* from_cell(CellImpl const* cell)
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{
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return reinterpret_cast<HeapBlockBase*>(bit_cast<FlatPtr>(cell) & ~(HeapBlockBase::block_size - 1));
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}
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Heap& heap() { return m_heap; }
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protected:
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HeapBlockBase(Heap& heap)
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: m_heap(heap)
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{
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}
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Heap& m_heap;
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};
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}
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