C# Класс GSF.IO.FileStructure.Media.DiskIoSession

Provides a data IO session with the disk subsystem to perform basic read and write operations.

Наследование: IDisposable

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Открытые свойства

Свойство	Тип	Описание
CachedLookups	long
Lookups	long

Открытые методы

Метод	Описание
Clear ( ) : void
DiskIoSession ( DiskIo diskIo, BinaryStreamIoSessionBase ioSession, FileHeaderBlock header, SubFileHeader file ) : System	Creates a new DiskIoSession that can be used to read from the disk subsystem.
Dispose ( ) : void	Releases all the resources used by the DiskIoSession object.
Read ( uint blockIndex, BlockType blockType, uint indexValue ) : void	Navigates to a block that will be only read and not modified.
ReadOld ( uint blockIndex, BlockType blockType, uint indexValue ) : void	Navigates to a block that will be only read and not modified.
WriteToExistingBlock ( uint blockIndex, BlockType blockType, uint indexValue ) : void	Navigates to a block that will be written to. This block must currently exist and have the correct parameters passed to this function In order to allow this block to be modified.
WriteToNewBlock ( uint blockIndex, BlockType blockType, uint indexValue ) : void	Navigates to a block that will be written to. This class does not check if overwriting an existing block. So be careful not to corrupt the file. This function will increase the size of the file if the block excedes the current size of the file.

Приватные методы

Метод	Описание
ClearFooterData ( ) : void
IsFooterCurrentSnapshotAndValid ( ) : IoReadState
IsFooterValid ( ) : IoReadState
IsFooterValidFromOldBlock ( ) : IoReadState
ReadBlock ( bool requestWriteAccess ) : void	Tries to read data from the following file
WriteFooterData ( ) : void

Описание методов

Clear() публичный Метод

public Clear ( ) : void
Результат	void

DiskIoSession() публичный Метод

Creates a new DiskIoSession that can be used to read from the disk subsystem.

public DiskIoSession ( DiskIo diskIo, BinaryStreamIoSessionBase ioSession, FileHeaderBlock header, SubFileHeader file ) : System
diskIo	DiskIo	owner of the disk
ioSession	GSF.IO.Unmanaged.BinaryStreamIoSessionBase	the base ioSession to use for this io session
header	FileHeaderBlock
file	SubFileHeader	The file that will be read from this diskIoSession
Результат	System

Dispose() публичный Метод

Releases all the resources used by the DiskIoSession object.

public Dispose ( ) : void
Результат	void

Read() публичный Метод

Navigates to a block that will be only read and not modified.

public Read ( uint blockIndex, BlockType blockType, uint indexValue ) : void
blockIndex	uint
blockType	BlockType	the type of this block.
indexValue	uint	a value put in the footer of the block designating the index of this block
Результат	void

ReadOld() публичный Метод

Navigates to a block that will be only read and not modified.

public ReadOld ( uint blockIndex, BlockType blockType, uint indexValue ) : void
blockIndex	uint
blockType	BlockType	the type of this block.
indexValue	uint	a value put in the footer of the block designating the index of this block
Результат	void

WriteToExistingBlock() публичный Метод

Navigates to a block that will be written to. This block must currently exist and have the correct parameters passed to this function In order to allow this block to be modified.

public WriteToExistingBlock ( uint blockIndex, BlockType blockType, uint indexValue ) : void
blockIndex	uint	the index value of this block
blockType	BlockType	the type of this block.
indexValue	uint	a value put in the footer of the block designating the index of this block
Результат	void

WriteToNewBlock() публичный Метод

Navigates to a block that will be written to. This class does not check if overwriting an existing block. So be careful not to corrupt the file.

This function will increase the size of the file if the block excedes the current size of the file.

public WriteToNewBlock ( uint blockIndex, BlockType blockType, uint indexValue ) : void
blockIndex	uint	the index value of this block
blockType	BlockType	the type of this block.
indexValue	uint	a value put in the footer of the block designating the index of this block
Результат	void

Описание свойств

CachedLookups публичное статическое свойство

public static long CachedLookups
Результат	long

Lookups публичное статическое свойство

public static long Lookups
Результат	long