mirror of
https://github.com/RGBCube/serenity
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84a8ee01e1
This is to prepare for making per-type allocators, since we'll have a *lot* more HeapBlocks in that world.
53 lines
927 B
C++
53 lines
927 B
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.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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VM& vm() { return m_vm; }
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protected:
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HeapBase(VM& vm)
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: m_vm(vm)
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{
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}
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VM& m_vm;
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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 constexpr auto block_size = 4 * KiB;
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static HeapBlockBase* from_cell(Cell 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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