Kernel/Devices/NullDevice.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

#pragma once

#include "CharacterDevice.h"

class NullDevice final : public CharacterDevice {
    AK_MAKE_ETERNAL
public:
    NullDevice();
    virtual ~NullDevice() override;

    static NullDevice& the();

private:
    // ^CharacterDevice
    virtual ssize_t read(FileDescriptor&, byte*, ssize_t) override;
    virtual ssize_t write(FileDescriptor&, const byte*, ssize_t) override;
    virtual bool can_write(FileDescriptor&) const override { return true; }
    virtual bool can_read(FileDescriptor&) const override;
    virtual const char* class_name() const override { return "NullDevice"; }
};