2018-11-12 03:28:46 +03:00
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#pragma once
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2019-04-29 05:55:54 +03:00
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#include <Kernel/DoubleBuffer.h>
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#include <Kernel/File.h>
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2019-05-28 12:53:16 +03:00
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#include <Kernel/UnixTypes.h>
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2018-11-12 03:28:46 +03:00
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2019-06-07 10:36:51 +03:00
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class FileDescription;
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2019-04-29 05:55:54 +03:00
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class FIFO final : public File {
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2018-11-12 03:28:46 +03:00
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public:
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2019-06-07 18:13:23 +03:00
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enum class Direction : byte {
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2019-05-28 12:53:16 +03:00
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Neither,
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Reader,
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Writer
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2018-11-12 03:28:46 +03:00
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};
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2019-04-25 14:52:07 +03:00
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static RetainPtr<FIFO> from_fifo_id(dword);
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static Retained<FIFO> create(uid_t);
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2019-04-29 05:55:54 +03:00
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virtual ~FIFO() override;
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2019-04-25 14:52:07 +03:00
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uid_t uid() const { return m_uid; }
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2018-11-12 03:28:46 +03:00
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2019-06-07 10:36:51 +03:00
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Retained<FileDescription> open_direction(Direction);
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2018-11-12 03:28:46 +03:00
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2019-04-29 05:55:54 +03:00
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void attach(Direction);
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void detach(Direction);
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2018-11-12 03:28:46 +03:00
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private:
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2019-04-29 05:55:54 +03:00
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// ^File
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2019-06-07 10:36:51 +03:00
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virtual ssize_t write(FileDescription&, const byte*, ssize_t) override;
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virtual ssize_t read(FileDescription&, byte*, ssize_t) override;
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virtual bool can_read(FileDescription&) const override;
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virtual bool can_write(FileDescription&) const override;
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virtual String absolute_path(const FileDescription&) const override;
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2019-04-29 05:55:54 +03:00
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virtual const char* class_name() const override { return "FIFO"; }
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virtual bool is_fifo() const override { return true; }
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2019-04-25 14:52:07 +03:00
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explicit FIFO(uid_t);
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2018-11-12 03:28:46 +03:00
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unsigned m_writers { 0 };
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unsigned m_readers { 0 };
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2018-12-03 04:24:11 +03:00
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DoubleBuffer m_buffer;
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2019-04-25 14:52:07 +03:00
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uid_t m_uid { 0 };
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2018-11-12 03:28:46 +03:00
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};
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