blob: 69b2d377cc30da9dfd4703054da67ac6c6b3c398 (
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
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <Kernel/Devices/CharacterDevice.h>
namespace Kernel {
class ZeroDevice final : public CharacterDevice {
AK_MAKE_ETERNAL
public:
static NonnullRefPtr<ZeroDevice> must_create();
virtual ~ZeroDevice() override;
// ^Device
virtual mode_t required_mode() const override { return 0666; }
virtual String device_name() const override { return "zero"; }
private:
ZeroDevice();
// ^CharacterDevice
virtual KResultOr<size_t> read(FileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual KResultOr<size_t> write(FileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual bool can_read(const FileDescription&, size_t) const override;
virtual bool can_write(const FileDescription&, size_t) const override { return true; }
virtual StringView class_name() const override { return "ZeroDevice"; }
};
}
|
