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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.
44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
/*
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* Copyright (c) 2018-2020, 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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#pragma once
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#include <AK/Bitmap.h>
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#include <Kernel/Memory/VMObject.h>
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#include <Kernel/UnixTypes.h>
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namespace Kernel::Memory {
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class InodeVMObject : public VMObject {
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public:
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virtual ~InodeVMObject() override;
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Inode& inode() { return *m_inode; }
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Inode const& inode() const { return *m_inode; }
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size_t amount_dirty() const;
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size_t amount_clean() const;
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int release_all_clean_pages();
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int try_release_clean_pages(int page_amount);
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u32 writable_mappings() const;
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protected:
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explicit InodeVMObject(Inode&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
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explicit InodeVMObject(InodeVMObject const&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
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InodeVMObject& operator=(InodeVMObject const&) = delete;
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InodeVMObject& operator=(InodeVMObject&&) = delete;
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InodeVMObject(InodeVMObject&&) = delete;
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virtual bool is_inode() const final { return true; }
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NonnullLockRefPtr<Inode> m_inode;
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Bitmap m_dirty_pages;
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};
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}
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