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https://github.com/RGBCube/serenity
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b0e3f73375
Userspace programs can now open /dev/gui_events and read a stream of GUI_Event structs one at a time. I was stuck on a stupid problem where we'd reenter Scheduler::yield() due to having one of the has_data_available_for_reading() implementations using locks.
34 lines
886 B
C++
34 lines
886 B
C++
#pragma once
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#include <VirtualFileSystem/CharacterDevice.h>
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#include "DoubleBuffer.h"
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#include "IRQHandler.h"
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class PS2MouseDevice final : public IRQHandler, public CharacterDevice {
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public:
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PS2MouseDevice();
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virtual ~PS2MouseDevice() override;
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static PS2MouseDevice& the();
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// ^CharacterDevice
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virtual bool has_data_available_for_reading(Process&) const override;
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virtual ssize_t read(byte* buffer, size_t) override;
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virtual ssize_t write(const byte* buffer, size_t) override;
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private:
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// ^IRQHandler
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virtual void handle_irq() override;
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void initialize();
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void prepare_for_input();
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void prepare_for_output();
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void mouse_write(byte);
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byte mouse_read();
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void wait_then_write(byte port, byte data);
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byte wait_then_read(byte port);
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DoubleBuffer m_buffer;
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byte m_data_state { 0 };
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signed_byte m_data[3];
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};
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