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BlockDevice -> DiskDevice.

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BlockDevice was the wrong name for this abstraction, since a block device
is a type of file in a unix system, and we should use that name for that
concept in the fs implementation.
This commit is contained in:
Andreas Kling 2018-10-16 11:21:49 +02:00
parent 72bb80a9ae
commit 9cd0a34b5c
12 changed files with 62 additions and 64 deletions
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32
VirtualFileSystem/FileBackedDiskDevice.h Normal file
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#pragma once
#include "DiskDevice.h"
#include <AK/RetainPtr.h>
#include <AK/String.h>
#include <AK/Types.h>
#include <stdio.h>
class FileBackedDiskDevice final : public DiskDevice {
public:
static RetainPtr<FileBackedDiskDevice> create(String&& imagePath, unsigned blockSize);
virtual ~FileBackedDiskDevice() override;
bool isValid() const { return m_file; }
virtual unsigned blockSize() const override;
virtual bool readBlock(unsigned index, byte* out) const override;
virtual bool writeBlock(unsigned index, const byte*) override;
virtual bool read(qword offset, unsigned length, byte* out) const override;
virtual bool write(qword offset, unsigned length, const byte* data) override;
private:
virtual const char* className() const override;
FileBackedDiskDevice(String&& imagePath, unsigned blockSize);
String m_imagePath;
FILE* m_file { nullptr };
qword m_fileLength { 0 };
unsigned m_blockSize { 0 };
};