Difference between revisions of "TDiskPartition"
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Latest revision as of 03:51, 17 May 2018
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Description
To be documented
Class definitions
TDiskPartition = class(TListObject)
constructor Create(ADriver:TFileSysDriver; ADevice:TDiskDevice; APartition:TDiskPartition; APartitionNo:Integer);
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destructor Destroy; override;
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private
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FLock:TSynchronizerHandle;
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FLocalLock:TMutexHandle;
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protected
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FDriver:TFileSysDriver;
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FDevice:TDiskDevice;
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FPartition:TDiskPartition;
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FPartitionNo:Integer;
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\Partition1, \Partition2 etc - See Notes |
FEntryNo:Integer;
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0,1,2,3 |
FPartitionId:Byte;
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Partition Type from Table |
FBeginHead:Word;
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Logical Starting Head (not Physical) |
FBeginSector:Word;
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Logical Starting Sector (not Physical) |
FBeginCylinder:Word;
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Logical Starting Cylinder (not Physical) |
FEndHead:Word;
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Logical Ending Head (not Physical) |
FEndSector:Word;
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Logical Ending Sector (not Physical) |
FEndCylinder:Word;
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Logical Ending Cylinder (not Physical) |
FSectorOffset:LongWord;
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Offset in Sectors from Location of Table to StartSector |
FActive:Boolean;
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Active Partition Indicator ($80) |
FExtended:Boolean;
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Extended Partition Type (no Volume) - Set by Recognizer |
FRecognizable:Boolean;
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Partition allows Recognize Partition |
FRecognized:Boolean;
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Recognized Partition Id - Set by Recognizer |
FNonVolume:Boolean;
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Non Volume Partition (eg Linux Swap) - Set by Recognizer |
FMultiVolume:Boolean;
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Multiple Volume Partition (eg Netware) - Set by Recognizer |
FStartSector:Int64;
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Absolute Start Sector on Device |
FSectorCount:LongWord;
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Total Sectors in Partition |
function AcquireLock:Boolean;
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function ReleaseLock:Boolean;
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function GetName:String;
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function GetPath:String;
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function GetParent:String;
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function GetLogical:Boolean;
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function GetPrimary:Boolean;
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procedure SetExtended(AExtended:Boolean);
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function GetFreeSectors:LongWord;
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Unused Sectors in Partition |
function GetAvailableSectors:LongWord;
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Largest block of Unused Sectors |
function GetAvailableBlock(var AStart,ACount:LongWord):Boolean;
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function GetRoot:TDiskPartition;
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function GetParentStart:LongWord;
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function GetPartitionRecord(ARecord:Pointer,ASector:LongWord):Boolean; virtual;
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function SetPartitionRecord(ARecord:Pointer,ASector:LongWord):Boolean; virtual;
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public
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property Name:String read GetName;
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property Path:String read GetPath;
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property Parent:String read GetParent;
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property Device:TDiskDevice read FDevice;
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property Partition:TDiskPartition read FPartition;
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property PartitionNo:Integer read FPartitionNo;
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property EntryNo:Integer read FEntryNo write FEntryNo;
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property PartitionId:Byte read FPartitionId;
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property BeginHead:Word read FBeginHead;
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property BeginSector:Word read FBeginSector;
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property BeginCylinder:Word read FBeginCylinder;
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property EndHead:Word read FEndHead;
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property EndSector:Word read FEndSector;
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property EndCylinder:Word read FEndCylinder;
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property SectorOffset:LongWord read FSectorOffset;
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property Active:Boolean read FActive;
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property Logical:Boolean read GetLogical;
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property Primary:Boolean read GetPrimary;
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property Extended:Boolean read FExtended write SetExtended;
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property Recognizable:Boolean read FRecognizable;
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property Recognized:Boolean read FRecognized write FRecognized;
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property NonVolume:Boolean read FNonVolume write FNonVolume;
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property MultiVolume:Boolean read FMultiVolume write FMultiVolume;
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property StartSector:Int64 read FStartSector;
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property SectorCount:LongWord read FSectorCount;
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property FreeSectors:LongWord read GetFreeSectors;
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property AvailableSectors:LongWord read GetAvailableSectors;
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property Root:TDiskPartition read GetRoot;
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property ParentStart:LongWord read GetParentStart;
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function ReaderLock:Boolean;
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function ReaderUnlock:Boolean;
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function ReaderConvert:Boolean;
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function WriterLock:Boolean;
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function WriterUnlock:Boolean;
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function WriterConvert:Boolean;
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function PartitionInit:Boolean; virtual;
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function LocatePartitions:Boolean; virtual;
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function LocateVolumes:Boolean; virtual;
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function CreateVolume:TDiskVolume; virtual;
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function DeleteVolume(AVolume:TDiskVolume):Boolean; virtual;
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function OpenPartition(AMode:Integer):Integer; virtual;
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procedure ClosePartition(AHandle:Integer); virtual;
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function ReadPartition(AHandle:Integer; var ABuffer; ACount:Integer):Integer; virtual;
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function WritePartition(AHandle:Integer; const ABuffer; ACount:Integer):Integer; virtual;
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function SeekPartition(AHandle:Integer; const AOffset:Int64; AOrigin:Integer):Int64; virtual;
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Function declarations
constructor TDiskPartition.Create(ADriver:TFileSysDriver; ADevice:TDiskDevice; APartition:TDiskPartition; APartitionNo:Integer);
Description: To be documented
| Note | None documented |
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destructor TDiskPartition.Destroy;
Description: To be documented
| Note | None documented |
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function TDiskPartition.AcquireLock:Boolean;
Description: To be documented
| Note | None documented |
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function TDiskPartition.ReleaseLock:Boolean;
Description: To be documented
| Note | None documented |
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function TDiskPartition.GetName:String;
Description: To be documented
| Note | None documented |
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function TDiskPartition.GetPath:String;
Description: To be documented
| Note | None documented |
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function TDiskPartition.GetParent:String;
Description: To be documented
| Note | None documented |
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function TDiskPartition.GetLogical:Boolean;
Description: Check for a non extended partition with a parent
| Note | None documented |
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function TDiskPartition.GetPrimary:Boolean;
Description: Check for a non extended partition with no parent
| Note | None documented |
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procedure TDiskPartition.SetExtended(AExtended:Boolean);
Description: Mark partition as extended, update no and recalculate start
| Note | Once extended is enabled it cannot be turned off
If already enabled then no action is taken |
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function TDiskPartition.GetFreeSectors:LongWord;
Description: Get the total Count of Unused Sectors in the Partition
| Note | None documented |
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function TDiskPartition.GetAvailableSectors:LongWord;
Description: Get the largest Count of Unused Sectors in the Partition
| Note | None documented |
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function TDiskPartition.GetAvailableBlock(var AStart,ACount:LongWord):Boolean;
Description: Get the Start and Count of largest Unused Sectors in the Partition
| Note | None documented |
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function TDiskPartition.GetRoot:TDiskPartition;
Description: Returns the first level extended for a second level plus partition
| Note | None documented |
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function TDiskPartition.GetParentStart:LongWord;
Description: To be documented
| Note | None documented |
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function TDiskPartition.ReaderLock:Boolean;
Description: To be documented
| Note | None documented |
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function TDiskPartition.ReaderUnlock:Boolean;
Description: To be documented
| Note | None documented |
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function TDiskPartition.ReaderConvert:Boolean;
Description: Convert a Reader lock to a Writer lock
| Note | None documented |
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function TDiskPartition.WriterLock:Boolean;
Description: To be documented
| Note | None documented |
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function TDiskPartition.WriterUnlock:Boolean;
Description: To be documented
| Note | None documented |
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function TDiskPartition.WriterConvert:Boolean;
Description: Convert a Writer lock to a Reader lock
| Note | None documented |
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function TDiskPartition.PartitionInit:Boolean;
Description: To be documented
| Note | None documented |
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function TDiskPartition.LocatePartitions:Boolean;
Description: To be documented
| Note | None documented |
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function TDiskPartition.LocateVolumes:Boolean;
Description: To be documented
| Note | None documented |
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function TDiskPartition.CreateVolume:TDiskVolume;
Description: To be documented
| Note | None documented |
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function TDiskPartition.DeleteVolume(AVolume:TDiskVolume):Boolean;
Description: To be documented
| Note | Caller must hold the volume writer lock |
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function TDiskPartition.OpenPartition(AMode:Integer):Integer;
Description: To be documented
| Note | None documented |
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procedure TDiskPartition.ClosePartition(AHandle:Integer);
Description: To be documented
| Note | None documented |
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function TDiskPartition.ReadPartition(AHandle:Integer; var ABuffer; ACount:Integer):Integer;
Description: To be documented
| Note | Raw Reads must be in Sector sized multiples |
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function TDiskPartition.WritePartition(AHandle:Integer; const ABuffer; ACount:Integer):Integer;
Description: To be documented
| Note | Raw Writes must be in Sector sized multiples |
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function TDiskPartition.SeekPartition(AHandle:Integer; const AOffset:Int64; AOrigin:Integer):Int64;
Description: To be documented
| Note | Raw Seeks must be in Sector sized multiples
Raw Seeks cannot extend the size of the Partition |
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