BValueStorage Class Reference
[Data Model]

#include <support/MemoryStore.h>

Inheritance diagram for BValueStorage:

Detailed Description

This is an old implementation of byte streams on a value. It is flawed in some very significant ways, you should use the BValueDatum class instead.

Public Member Functions

BValueStorage (SValue *value, SLocker *lock, const sptr< SAtom > &object)

virtual ssize_t ReadAtV (off_t position, const struct iovec *vector, ssize_t count)

Read the bytes described by iovec from location position in the storage.

virtual status_t SetSize (off_t position)

Set the total number of bytes in the store.

virtual status_t Sync ()

Make sure all data in the stream is written to its physical device.

SValue Value () const

virtual ssize_t WriteAtV (off_t position, const struct iovec *vector, ssize_t count)

Write the bytes described by iovec at location position in the storage.

Protected Member Functions

virtual ~BValueStorage ()

Constructor & Destructor Documentation

BValueStorage ( SValue * value,

SLocker * lock,

const sptr< SAtom > & object

)

~BValueStorage ( ) [protected, virtual]

Member Function Documentation

ssize_t ReadAtV ( off_t position,

const struct iovec * vector,

ssize_t count

) [virtual]

Read the bytes described by iovec from location position in the storage.
Returns the number of bytes actually read, or a negative error code.
Reimplemented from BMemoryStore.

status_t SetSize ( off_t position ) [virtual]

Set the total number of bytes in the store.

Reimplemented from BMemoryStore.

status_t Sync ( ) [virtual]

Make sure all data in the stream is written to its physical device.
Returns B_OK if the data is safely stored away, else an error code.
Reimplemented from BMemoryStore.

SValue Value ( ) const

ssize_t WriteAtV ( off_t position,

const struct iovec * vector,

ssize_t count

) [virtual]

Write the bytes described by iovec at location position in the storage.
Returns the number of bytes actually written, or a negative error code.
Reimplemented from BMemoryStore.

The documentation for this class was generated from the following files:


Public Member Functions
	BValueStorage (SValue value, SLocker lock, const sptr< SAtom > &object)
virtual ssize_t	ReadAtV (off_t position, const struct iovec *vector, ssize_t count)
	Read the bytes described by iovec from location position in the storage.
virtual status_t	SetSize (off_t position)
	Set the total number of bytes in the store.
virtual status_t	Sync ()
	Make sure all data in the stream is written to its physical device.
SValue	Value () const
virtual ssize_t	WriteAtV (off_t position, const struct iovec *vector, ssize_t count)
	Write the bytes described by iovec at location position in the storage.
Protected Member Functions
virtual	~BValueStorage ()

BValueStorage Class Reference [Data Model]

Detailed Description

Public Member Functions

Protected Member Functions

Constructor & Destructor Documentation

Member Function Documentation

BValueStorage Class Reference
[Data Model]