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serenity/Kernel/Devices/RandomDevice.h
Andreas Kling 4a9c18afb9 Kernel: Rename FileDescription => OpenFileDescription
Dr. POSIX really calls these "open file description", not just
"file description", so let's call them exactly that. :^)
2021-09-07 13:53:14 +02:00

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C++

/*
* 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 RandomDevice final : public CharacterDevice {
AK_MAKE_ETERNAL
public:
static NonnullRefPtr<RandomDevice> must_create();
virtual ~RandomDevice() override;
// ^Device
virtual mode_t required_mode() const override { return 0666; }
virtual String device_name() const override { return "random"; }
private:
RandomDevice();
// ^CharacterDevice
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual bool can_read(const OpenFileDescription&, size_t) const override;
virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
virtual StringView class_name() const override { return "RandomDevice"; }
};
}