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Kernel: Make FIFO inherit from File.

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This commit is contained in:
Andreas Kling 2019-04-29 04:55:54 +02:00
parent f254a84d17
commit 0a0d739e98
18 changed files with 96 additions and 72 deletions
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30
Kernel/FileSystem/FIFO.h
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@ -1,11 +1,12 @@
#pragma once
#include "DoubleBuffer.h"
#include <AK/Retainable.h>
#include <AK/RetainPtr.h>
#include <Kernel/DoubleBuffer.h>
#include <Kernel/UnixTypes.h>
#include <Kernel/File.h>
class FIFO : public Retainable<FIFO> {
class FileDescriptor;
class FIFO final : public File {
public:
enum Direction {
Neither, Reader, Writer
@ -14,20 +15,25 @@ public:
static RetainPtr<FIFO> from_fifo_id(dword);
static Retained<FIFO> create(uid_t);
~FIFO();
virtual ~FIFO() override;
uid_t uid() const { return m_uid; }
void open(Direction);
void close(Direction);
Retained<FileDescriptor> open_direction(Direction);
ssize_t write(const byte*, ssize_t);
ssize_t read(byte*, ssize_t);
bool can_read() const;
bool can_write() const;
void attach(Direction);
void detach(Direction);
private:
// ^File
virtual ssize_t write(Process&, const byte*, ssize_t) override;
virtual ssize_t read(Process&, byte*, ssize_t) override;
virtual bool can_read(Process&) const override;
virtual bool can_write(Process&) const override;
virtual String absolute_path() const override;
virtual const char* class_name() const override { return "FIFO"; }
virtual bool is_fifo() const override { return true; }
explicit FIFO(uid_t);
unsigned m_writers { 0 };