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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#pragma once
8
9#include <Kernel/Memory/InodeVMObject.h>
10#include <Kernel/UnixTypes.h>
11
12namespace Kernel::Memory {
13
14class SharedInodeVMObject final : public InodeVMObject {
15 AK_MAKE_NONMOVABLE(SharedInodeVMObject);
16
17public:
18 static ErrorOr<NonnullLockRefPtr<SharedInodeVMObject>> try_create_with_inode(Inode&);
19 static ErrorOr<NonnullLockRefPtr<SharedInodeVMObject>> try_create_with_inode_and_range(Inode&, u64 offset, size_t range_size);
20 virtual ErrorOr<NonnullLockRefPtr<VMObject>> try_clone() override;
21
22 ErrorOr<void> sync(off_t offset_in_pages = 0, size_t pages = -1);
23
24private:
25 virtual bool is_shared_inode() const override { return true; }
26
27 explicit SharedInodeVMObject(Inode&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
28 explicit SharedInodeVMObject(SharedInodeVMObject const&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
29
30 virtual StringView class_name() const override { return "SharedInodeVMObject"sv; }
31
32 SharedInodeVMObject& operator=(SharedInodeVMObject const&) = delete;
33};
34
35}