Implementation of file based on buffered writes and block remapping via a translation layer. More...

#include <wbtl_file.h>

Inheritance diagram for wbtl_file:

Collaboration diagram for wbtl_file:

Public Member Functions
	wbtl_file (file *backend_file, size_type write_buffer_size, int write_buffers=2, int queue_id=DEFAULT_QUEUE, int allocator_id=NO_ALLOCATOR)
	constructs file object
offset_type	size ()
	Returns size of the file.
void	set_size (offset_type newsize)
void	lock ()
	Locks file for reading and writing (acquires a lock in the file system).
void	serve (const request *req) throw (io_error)
void	discard (offset_type offset, offset_type size)
const char *	io_type () const
	Identifies the type of I/O implementation.
Protected Member Functions
void	sread (void *buffer, offset_type offset, size_type bytes)
void	swrite (void *buffer, offset_type offset, size_type bytes)
offset_type	get_next_write_block ()
void	check_corruption (offset_type region_pos, offset_type region_size, sortseq::iterator pred, sortseq::iterator succ)

Detailed Description

Implementation of file based on buffered writes and block remapping via a translation layer.

Constructor & Destructor Documentation

constructs file object

Parameters:

	backend_file	file object used as storage backend, will be deleted in ~wbtl_file()
	disk	disk(file) identifier

const char* wbtl_file::io_type ( ) const [virtual]

Identifies the type of I/O implementation.

Returns:: pointer to null terminated string of characters, containing the name of I/O implementation

Reimplemented from file.

void wbtl_file::lock ( ) [virtual]

Locks file for reading and writing (acquires a lock in the file system).

Implements file.

offset_type wbtl_file::size ( ) [virtual]

Returns size of the file.

Implements file.

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