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79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
/*
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* Copyright (c) 2021, 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/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/CharacterDevice.h>
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#include <Kernel/Devices/HID/HIDDevice.h>
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#include <Kernel/Interrupts/IRQHandler.h>
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#include <Kernel/Random.h>
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namespace Kernel {
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class KeyboardDevice : public HIDDevice {
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public:
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using Event = KeyEvent;
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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(const OpenFileDescription&, size_t) const override;
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virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
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virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
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// ^HIDDevice
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virtual Type instrument_type() const override { return Type::Keyboard; }
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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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protected:
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KeyboardDevice();
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mutable Spinlock 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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bool m_has_e0_prefix { false };
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bool m_left_shift_pressed { false };
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bool m_right_shift_pressed { 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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