TDiskImage

Return to Unit Filesystem

Description

---

To be documented

Class definitions

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TDiskImage = class(TListObject)

constructor Create(ADriver:TFileSysDriver; AController:TDiskController; const AName:String; AImageNo:Integer);
destructor Destroy; override;
private
FLock:TSynchronizerHandle;
FLocalLock:TMutexHandle;
protected
FDriver:TFileSysDriver;
FController:TDiskController;
FName:String;
FImageNo:Integer;
FLocked:Boolean;
FChanged:Boolean;
FAttributes:LongWord;
FImageType:TImageType;
FMediaType:TMediaType;
FFloppyType:TFloppyType;
FCylinders:LongWord;	Physical Cylinders on Drive
FHeads:LongWord;	Physical Heads on Drive
FSectors:LongWord;	Physical Sectors per Track
FLogicalShiftCount:Word;	Physical to Logical Shift Count
FSectorSize:Word;	Bytes Per Sector
FSectorCount:Int64;	Total Sectors
FSectorShiftCount:Word;	Sectors to Bytes Shift Count
FPartitionId:Byte;	Partition Type for Table
FFileSysType:TFileSysType;
FDevice:TDiskDevice;
function AcquireLock:Boolean;
function ReleaseLock:Boolean;
function GetReady:Boolean; virtual;
function GetReadable:Boolean; virtual;
function GetWriteable:Boolean; virtual;
function GetEraseable:Boolean; virtual;
function GetCylinders:LongWord; virtual;
function GetHeads:LongWord; virtual;
function GetSectors:LongWord; virtual;
function GetLogicalShiftCount:Word; virtual;
function GetSectorSize:Word; virtual;
function GetSectorCount:Int64; virtual;
function GetSectorShiftCount:Word; virtual;
function GetPartitionId:Byte; virtual;
function GetName:String; virtual;
procedure SetName(const AName:String); virtual;
procedure SetDevice(ADevice:TDiskDevice);
public
property Controller:TDiskController read FController;
property Name:String read GetName write SetName;
property ImageNo:Integer read FImageNo;
property Ready:Boolean read GetReady;
property Locked:Boolean read FLocked;
property Changed:Boolean read FChanged;
property Readable:Boolean read GetReadable;
property Writeable:Boolean read GetWriteable;
property Eraseable:Boolean read GetEraseable;
property Attributes:LongWord read FAttributes;
property ImageType:TImageType read FImageType;
property MediaType:TMediaType read FMediaType;
property FloppyType:TFloppyType read FFloppyType;
property Cylinders:LongWord read FCylinders;
property Heads:LongWord read FHeads;
property Sectors:LongWord read FSectors;
property LogicalShiftCount:Word read FLogicalShiftCount;
property SectorSize:Word read FSectorSize;
property SectorCount:Int64 read FSectorCount;
property SectorShiftCount:Word read FSectorShiftCount;
property PartitionId:Byte read FPartitionId;
property FileSysType:TFileSysType read FFileSysType;
property Device:TDiskDevice read FDevice write SetDevice;
function ReaderLock:Boolean;
function ReaderUnlock:Boolean;
function ReaderConvert:Boolean;
function WriterLock:Boolean;
function WriterUnlock:Boolean;
function WriterConvert:Boolean;
function WriterOwner:Boolean;
function ImageInit:Boolean; virtual;
function LockMedia:Boolean; virtual;
function UnlockMedia:Boolean; virtual;
function EjectMedia:Boolean; virtual;
function MediaReady:Boolean; virtual;
function MediaChanged:Boolean; virtual;
function MediaLocked:Boolean; virtual;
function Read(ASector:LongWord; ACount:Word; var ABuffer):Boolean; virtual;
function Write(ASector:LongWord; ACount:Word; const ABuffer):Boolean; virtual;
function Allocated(ASector:LongWord; ACount:Word):Word; virtual;
function MountImage:Boolean; virtual;
function DismountImage:Boolean; virtual;
function InsertImage:Boolean; virtual;
function EjectImage:Boolean; virtual;
function ConvertImage(AImageType:TImageType):Boolean; virtual;
function CopyImage(ADest:TDiskImage):Boolean; virtual;
function ShrinkImage(const ASize:Int64):Boolean; virtual;
function ExpandImage(const ASize:Int64):Boolean; virtual;
function CreateImage(AMediaType:TMediaType; AFloppyType:TFloppyType; AAttributes:LongWord; ASectorSize:Word; const ASectorCount:Int64; ACylinders,AHeads,ASectors:LongWord; APartitionId:Byte):Integer; virtual;
function OpenImage(AMediaType:TMediaType; AFloppyType:TFloppyType; AAttributes:LongWord; ASectorSize:Word; const ASectorCount:Int64; ACylinders,AHeads,ASectors:LongWord; APartitionId:Byte):Integer; virtual;
function CloseImage:Boolean; virtual;
function ResizeImage(const ASectorCount:Int64):Boolean; virtual;
function CreateSnapshot:Boolean; virtual;
function DeleteSnapshot:Boolean; virtual;
function MergeSnapshot:Boolean; virtual;

Function declarations

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constructor TDiskImage.Create(ADriver:TFileSysDriver; AController:TDiskController; const AName:String; AImageNo:Integer);

Description: To be documented

Note	None documented

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destructor TDiskImage.Destroy;

Description: To be documented

Note	None documented

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function TDiskImage.AcquireLock:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.ReleaseLock:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.GetReady:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.GetReadable:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.GetWriteable:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.GetEraseable:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.GetCylinders:LongWord;

Description: To be documented

Note	None documented

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function TDiskImage.GetHeads:LongWord;

Description: To be documented

Note	None documented

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function TDiskImage.GetSectors:LongWord;

Description: To be documented

Note	None documented

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function TDiskImage.GetLogicalShiftCount:Word;

Description: To be documented

Note	None documented

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function TDiskImage.GetSectorSize:Word;

Description: To be documented

Note	None documented

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function TDiskImage.GetSectorCount:Int64;

Description: To be documented

Note	None documented

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function TDiskImage.GetSectorShiftCount:Word;

Description: To be documented

Note	None documented

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function TDiskImage.GetPartitionId:Byte;

Description: To be documented

Note	None documented

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function TDiskImage.GetName:String;

Description: To be documented

Note	None documented

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procedure TDiskImage.SetName(const AName:String);

Description: To be documented

Note	None documented

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procedure TDiskImage.SetDevice(ADevice:TDiskDevice);

Description: Set the Device and Reinitialize the Device

Note	None documented

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function TDiskImage.ReaderLock:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.ReaderUnlock:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.ReaderConvert:Boolean;

Description: Convert a Reader lock to a Writer lock

Note	None documented

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function TDiskImage.WriterLock:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.WriterUnlock:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.WriterConvert:Boolean;

Description: Convert a Writer lock to a Reader lock

Note	None documented

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function TDiskImage.WriterOwner:Boolean;

Description: Return True if the current thread is the writer owner

Note	None documented

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function TDiskImage.ImageInit:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.LockMedia:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.UnlockMedia:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.EjectMedia:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.MediaReady:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.MediaChanged:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.MediaLocked:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.Read(ASector:LongWord; ACount:Word; var ABuffer):Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.Write(ASector:LongWord; ACount:Word; const ABuffer):Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.Allocated(ASector:LongWord; ACount:Word):Word;

Description: Used by Copier to determine allocated Sectors

Note	None documented

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function TDiskImage.MountImage:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.DismountImage:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.InsertImage:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.EjectImage:Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.ConvertImage(AImageType:TImageType):Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.CopyImage(ADest:TDiskImage):Boolean;

Description: To be documented

Note	Caller must hold the dest writer lock

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function TDiskImage.ShrinkImage(const ASize:Int64):Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.ExpandImage(const ASize:Int64):Boolean;

Description: To be documented

Note	None documented

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function TDiskImage.CreateImage(AMediaType:TMediaType; AFloppyType:TFloppyType; AAttributes:LongWord; ASectorSize:Word; const ASectorCount:Int64; ACylinders,AHeads,ASectors:LongWord; APartitionId:Byte):Integer;

Description: Used by Imager to perform Create Image

Note	None documented

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function TDiskImage.OpenImage(AMediaType:TMediaType; AFloppyType:TFloppyType; AAttributes:LongWord; ASectorSize:Word; const ASectorCount:Int64; ACylinders,AHeads,ASectors:LongWord; APartitionId:Byte):Integer;

Description: To be documented

Note	None documented

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function TDiskImage.CloseImage:Boolean;

Description: Used by Imager to perform Close Image

Note	None documented

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function TDiskImage.ResizeImage(const ASectorCount:Int64):Boolean;

Description: Used by Resizer to perform Shrink or Expand Image

Note	None documented

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function TDiskImage.CreateSnapshot:Boolean;

Description: Used by Imager to perform Create Snapshot

Note	None documented

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function TDiskImage.DeleteSnapshot:Boolean;

Description: Used by Imager to perform Delete Snapshot

Note	None documented

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function TDiskImage.MergeSnapshot:Boolean;

Description: Used by Imager to perform Merge Snapshot

Note	None documented

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