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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.
34 lines
1 KiB
C++
34 lines
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 <Kernel/Memory/InodeVMObject.h>
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#include <Kernel/UnixTypes.h>
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namespace Kernel::Memory {
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class SharedInodeVMObject final : public InodeVMObject {
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AK_MAKE_NONMOVABLE(SharedInodeVMObject);
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public:
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static ErrorOr<NonnullLockRefPtr<SharedInodeVMObject>> try_create_with_inode(Inode&);
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virtual ErrorOr<NonnullLockRefPtr<VMObject>> try_clone() override;
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ErrorOr<void> sync(off_t offset_in_pages = 0, size_t pages = -1);
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private:
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virtual bool is_shared_inode() const override { return true; }
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explicit SharedInodeVMObject(Inode&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
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explicit SharedInodeVMObject(SharedInodeVMObject const&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
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virtual StringView class_name() const override { return "SharedInodeVMObject"sv; }
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SharedInodeVMObject& operator=(SharedInodeVMObject const&) = delete;
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};
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}
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