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https://github.com/RGBCube/serenity
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2c72d495a3
I believe this to be safe, as the main thing that LockRefPtr provides over RefPtr is safe copying from a shared LockRefPtr instance. I've inspected the uses of RefPtr<PhysicalPage> and it seems they're all guarded by external locking. Some of it is less obvious, but this is an area where we're making continuous headway.
41 lines
1 KiB
C++
41 lines
1 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Singleton.h>
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#include <Kernel/Memory/MemoryManager.h>
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#include <Kernel/Memory/VMObject.h>
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namespace Kernel::Memory {
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static Singleton<SpinlockProtected<VMObject::AllInstancesList>> s_all_instances;
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SpinlockProtected<VMObject::AllInstancesList>& VMObject::all_instances()
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{
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return s_all_instances;
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}
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ErrorOr<FixedArray<RefPtr<PhysicalPage>>> VMObject::try_clone_physical_pages() const
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{
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return m_physical_pages.try_clone();
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}
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ErrorOr<FixedArray<RefPtr<PhysicalPage>>> VMObject::try_create_physical_pages(size_t size)
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{
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return FixedArray<RefPtr<PhysicalPage>>::try_create(ceil_div(size, static_cast<size_t>(PAGE_SIZE)));
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}
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VMObject::VMObject(FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages)
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: m_physical_pages(move(new_physical_pages))
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{
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all_instances().with([&](auto& list) { list.append(*this); });
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}
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VMObject::~VMObject()
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{
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VERIFY(m_regions.is_empty());
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}
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}
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