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c6f2890d8e
FileHandle gets a hasDataAvailableForRead() getter. If this returns true in sys$read(), the task will block(BlockedRead) + yield. The fd blocked on is stored in Task::m_fdBlockedOnRead. The scheduler then looks at the state of that fd during the unblock phase. This makes "sh" restful. :^) There's still some problem with the kernel not surviving the colonel task getting scheduled. I need to figure that out and fix it.
27 lines
639 B
C++
27 lines
639 B
C++
#pragma once
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#include <AK/Types.h>
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#include <AK/DoublyLinkedList.h>
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#include <AK/CircularQueue.h>
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#include <VirtualFileSystem/CharacterDevice.h>
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#include "IRQHandler.h"
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class Keyboard final : public IRQHandler, public CharacterDevice {
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public:
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virtual ~Keyboard() override;
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Keyboard();
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private:
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// ^IRQHandler
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virtual void handleIRQ() override;
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// ^CharacterDevice
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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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virtual bool hasDataAvailableForRead() const override;
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CircularQueue<byte, 16> m_queue;
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byte m_modifiers { 0 };
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};
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