summaryrefslogtreecommitdiff
path: root/Kernel/Memory/SharedInodeVMObject.h
blob: 2c38eead01647449abfbaea0dab485d66c1940a3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#pragma once

#include <Kernel/Memory/InodeVMObject.h>
#include <Kernel/UnixTypes.h>

namespace Kernel::Memory {

class SharedInodeVMObject final : public InodeVMObject {
    AK_MAKE_NONMOVABLE(SharedInodeVMObject);

public:
    static ErrorOr<NonnullRefPtr<SharedInodeVMObject>> try_create_with_inode(Inode&);
    virtual ErrorOr<NonnullRefPtr<VMObject>> try_clone() override;

    ErrorOr<void> sync(off_t offset_in_pages = 0, size_t pages = -1);

private:
    virtual bool is_shared_inode() const override { return true; }

    explicit SharedInodeVMObject(Inode&, FixedArray<RefPtr<PhysicalPage>>&&);
    explicit SharedInodeVMObject(SharedInodeVMObject const&, FixedArray<RefPtr<PhysicalPage>>&&);

    virtual StringView class_name() const override { return "SharedInodeVMObject"sv; }

    SharedInodeVMObject& operator=(SharedInodeVMObject const&) = delete;
};

}