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https://github.com/RGBCube/serenity
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aee4786d8e
This singleton simplifies many aspects that we struggled with before: 1. There's no need to make derived classes of Device expose the constructor as public anymore. The singleton is a friend of them, so he can call the constructor. This solves the issue with try_create_device helper neatly, hopefully for good. 2. Getting a reference of the NullDevice is now being done from this singleton, which means that NullDevice no longer needs to use its own singleton, and we can apply the try_create_device helper on it too :) 3. We can now defer registration completely after the Device constructor which means the Device constructor is merely assigning the major and minor numbers of the Device, and the try_create_device helper ensures it calls the after_inserting method immediately after construction. This creates a great opportunity to make registration more OOM-safe.
50 lines
1.2 KiB
C++
50 lines
1.2 KiB
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 <AK/CircularQueue.h>
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#include <AK/DoublyLinkedList.h>
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#include <AK/Types.h>
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#include <Kernel/API/KeyCode.h>
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#include <Kernel/Devices/HID/I8042Controller.h>
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#include <Kernel/Devices/HID/KeyboardDevice.h>
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#include <Kernel/Interrupts/IRQHandler.h>
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#include <Kernel/Random.h>
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#include <LibKeyboard/CharacterMap.h>
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namespace Kernel {
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class PS2KeyboardDevice final : public IRQHandler
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, public KeyboardDevice
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, public I8042Device {
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friend class DeviceManagement;
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public:
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static RefPtr<PS2KeyboardDevice> try_to_initialize(const I8042Controller&);
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virtual ~PS2KeyboardDevice() override;
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bool initialize();
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virtual StringView purpose() const override { return class_name(); }
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// ^I8042Device
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virtual void irq_handle_byte_read(u8 byte) override;
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virtual void enable_interrupts() override
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{
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enable_irq();
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}
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private:
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explicit PS2KeyboardDevice(const I8042Controller&);
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// ^IRQHandler
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virtual bool handle_irq(const RegisterState&) override;
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// ^CharacterDevice
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virtual StringView class_name() const override { return "KeyboardDevice"; }
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};
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}
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