IStorage Class Reference
[Data Model]

#include <support/IStorage.h>

Inheritance diagram for IStorage:

Detailed Description

Random-access interface to a block of raw data.

Public Member Functions

ssize_t ReadAt (off_t position, void *buffer, size_t size)

Convenience for reading a vector of one buffer.

virtual ssize_t ReadAtV (off_t position, const struct iovec *vector, ssize_t count)=0

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

virtual status_t SetSize (off_t size)=0

Set the total number of bytes in the store.

virtual off_t Size () const =0

Return the total number of bytes in the store.

virtual status_t Sync ()=0

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

ssize_t WriteAt (off_t position, const void *buffer, size_t size)

Convenience for reading a vector of one buffer.

virtual ssize_t WriteAtV (off_t position, const struct iovec *vector, ssize_t count)=0

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

Member Function Documentation

ssize_t ReadAt ( off_t position,

void * buffer,

size_t size

) [inline]

Convenience for reading a vector of one buffer.

virtual ssize_t ReadAtV ( off_t position,

const struct iovec * vector,

ssize_t count

) [pure 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.
Implemented in BFile, BStreamDatum::Stream, BVFSFile, BMemoryStore, and BValueStorage.

virtual status_t SetSize ( off_t size ) [pure virtual]

Set the total number of bytes in the store.

Implemented in BFile, BStreamDatum::Stream, BVFSFile, BMemoryStore, and BValueStorage.

virtual off_t Size ( ) const [pure virtual]

Return the total number of bytes in the store.

Implemented in BFile, BStreamDatum::Stream, BVFSFile, and BMemoryStore.

virtual status_t Sync ( ) [pure virtual]

Make sure all data in the storage is written to its physical device.
Returns B_OK if the data is safely stored away, else an error code.
Implemented in BFile, BStreamDatum::Stream, BVFSFile, BMemoryStore, and BValueStorage.

ssize_t WriteAt ( off_t position,

const void * buffer,

size_t size

) [inline]

Convenience for reading a vector of one buffer.

virtual ssize_t WriteAtV ( off_t position,

const struct iovec * vector,

ssize_t count

) [pure 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.
Implemented in BFile, BStreamDatum::Stream, BVFSFile, BMemoryStore, and BValueStorage.

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

IStorage.h


Public Member Functions
ssize_t	ReadAt (off_t position, void *buffer, size_t size)
	Convenience for reading a vector of one buffer.
virtual ssize_t	ReadAtV (off_t position, const struct iovec *vector, ssize_t count)=0
	Read the bytes described by iovec from location position in the storage.
virtual status_t	SetSize (off_t size)=0
	Set the total number of bytes in the store.
virtual off_t	Size () const =0
	Return the total number of bytes in the store.
virtual status_t	Sync ()=0
	Make sure all data in the storage is written to its physical device.
ssize_t	WriteAt (off_t position, const void *buffer, size_t size)
	Convenience for reading a vector of one buffer.
virtual ssize_t	WriteAtV (off_t position, const struct iovec *vector, ssize_t count)=0
	Write the bytes described by iovec at location position in the storage.

IStorage Class Reference [Data Model]

Detailed Description

Public Member Functions

Member Function Documentation

IStorage Class Reference
[Data Model]