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https://github.com/SerenityOS/serenity
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35 lines
990 B
C++
35 lines
990 B
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/Devices/CharacterDevice.h>
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namespace Kernel {
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class ZeroDevice final : public CharacterDevice {
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friend class DeviceManagement;
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public:
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static NonnullLockRefPtr<ZeroDevice> must_create();
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virtual ~ZeroDevice() override;
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private:
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ZeroDevice();
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// ^Device
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virtual bool is_openable_by_jailed_processes() const override { return true; }
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// ^CharacterDevice
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virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
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virtual ErrorOr<size_t> write(OpenFileDescription&, u64, UserOrKernelBuffer const&, size_t) override;
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virtual bool can_read(OpenFileDescription const&, u64) const override;
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virtual bool can_write(OpenFileDescription const&, u64) const override { return true; }
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virtual StringView class_name() const override { return "ZeroDevice"sv; }
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};
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}
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