sim_disk_file Class Reference

Implementation of disk emulation. More...

#include <simdisk_file.h>

Inheritance diagram for sim_disk_file:

Collaboration diagram for sim_disk_file:

List of all members.

Public Member Functions
	sim_disk_file (const std::string &filename, int mode, int queue_id=DEFAULT_QUEUE, int allocator_id=NO_ALLOCATOR)
	constructs file object
void	serve (const request *req) throw (io_error)
void	set_size (offset_type newsize)
	Changes the size of the file.
const char *	io_type () const
	Identifies the type of I/O implementation.
Public Member Functions inherited from ufs_file_base
offset_type	size ()
	Returns size of the file.
void	lock ()
	Locks file for reading and writing (acquires a lock in the file system)
void	remove ()
Public Member Functions inherited from file
void	add_request_ref ()
void	delete_request_ref ()
int	get_request_nref ()
virtual int	get_physical_device_id () const
virtual void	discard (offset_type offset, offset_type size)
	Discard a region of the file (mark it unused) some specialized file types may need to know freed regions.
virtual void	export_files (offset_type offset, offset_type length, std::string prefix)
Public Member Functions inherited from disk_queued_file
	disk_queued_file (int queue_id, int allocator_id)
request_ptr	aread (void *buffer, offset_type pos, size_type bytes, const completion_handler &on_cmpl)
	Schedules an asynchronous read request to the file.
request_ptr	awrite (void *buffer, offset_type pos, size_type bytes, const completion_handler &on_cmpl)
	Schedules an asynchronous write request to the file.
virtual int	get_queue_id () const
	Returns the identifier of the file's queue.
virtual int	get_allocator_id () const
	Returns the file's allocator.

Additional Inherited Members
Protected Member Functions inherited from ufs_file_base
	ufs_file_base (const std::string &filename, int mode)
offset_type	_size ()
void	close ()
Protected Member Functions inherited from file
	file ()
	Initializes file object.
Protected Attributes inherited from ufs_file_base
mutex	fd_mutex
int	file_des
int	mode_
const std::string	filename

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Detailed Description

Implementation of disk emulation.

Remarks:

It is emulation of IBM IC35L080AVVA07 disk's timings

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Constructor & Destructor Documentation

sim_disk_file::sim_disk_file ( const std::string &  filename, int  mode, int  queue_id = DEFAULT_QUEUE, int  allocator_id = NO_ALLOCATOR  )

inline

constructs file object

Parameters:

filename

path of file

Attention:

filename must be resided at memory disk partition

Parameters:

mode	open mode, see stxxl::file::open_modes
disk	disk(file) identifier

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Member Function Documentation

const char* sim_disk_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 ufs_file_base.

void sim_disk_file::set_size ( offset_type  newsize )

virtual

Changes the size of the file.

Parameters:

newsize

new file size

Reimplemented from ufs_file_base.

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

• simdisk_file.h