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https://github.com/SerenityOS/serenity
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96e1391c23
This change has many improvements: - We don't use `LockRefPtr` to hold instances of many base devices as with the DeviceManagement class. Instead, we have a saner pattern of holding them in a `NonnullRefPtr<T> const`, in a small-text footprint class definition in the `Device.cpp` file. - The awkwardness of using `::the()` each time we need to get references to mostly-static objects (like the Event queue) in runtime is now gone in the migration to using the `Device` class. - Acquiring a device feel more obvious because we use now the Device class for this method. The method name is improved as well.
68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
/*
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* Copyright (c) 2021-2023, Liav A. <liavalb@hotmail.co.il>
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* Copyright (c) 2021, Edwin Hoksberg <mail@edwinhoksberg.nl>
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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/Types.h>
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#include <Kernel/API/KeyCode.h>
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#include <Kernel/Devices/CharacterDevice.h>
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#include <Kernel/Devices/HID/Device.h>
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#include <Kernel/Devices/HID/ScanCodeEvent.h>
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#include <Kernel/Interrupts/IRQHandler.h>
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#include <Kernel/Security/Random.h>
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namespace Kernel {
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class KeyboardDevice : public HIDDevice {
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friend class Device;
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public:
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using Event = KeyEvent;
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static ErrorOr<NonnullRefPtr<KeyboardDevice>> try_to_initialize();
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virtual ~KeyboardDevice() override;
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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 bool can_read(OpenFileDescription const&, u64) const override;
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virtual ErrorOr<size_t> write(OpenFileDescription&, u64, UserOrKernelBuffer const&, size_t) override { return EINVAL; }
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virtual bool can_write(OpenFileDescription const&, u64) const override { return true; }
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// ^File
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virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
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void update_modifier(u8 modifier, bool state)
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{
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if (state)
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m_modifiers |= modifier;
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else
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m_modifiers &= ~modifier;
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}
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u8 modifiers() const { return m_modifiers; }
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void handle_input_event(KeyEvent);
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bool num_lock_on() const { return m_num_lock_on; }
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protected:
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KeyboardDevice();
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mutable Spinlock<LockRank::None> m_queue_lock {};
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CircularQueue<Event, 16> m_queue;
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// ^CharacterDevice
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virtual StringView class_name() const override { return "KeyboardDevice"sv; }
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u8 m_modifiers { 0 };
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bool m_caps_lock_to_ctrl_pressed { false };
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bool m_caps_lock_on { false };
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bool m_num_lock_on { false };
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void key_state_changed(u8 raw, bool pressed);
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};
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}
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