Detailed Description

Implementation of some file methods based on serving_request.

Definition at line 30 of file disk_queued_file.h.

Inheritance diagram for stxxl::disk_queued_file:

Collaboration diagram for stxxl::disk_queued_file:

Public Member Functions
	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)

request_ptr	awrite (void *buffer, offset_type pos, size_type bytes, const completion_handler &on_cmpl)

virtual int	get_allocator_id () const
	Returns the file's allocator. More...

virtual int	get_queue_id () const
	Returns the identifier of the file's queue. More...

Public Member Functions inherited from stxxl::file
virtual	~file ()

void	add_request_ref ()

virtual request_ptr	aread (void *buffer, offset_type pos, size_type bytes, const completion_handler &on_cmpl)=0
	Schedules an asynchronous read request to the file. More...

virtual request_ptr	awrite (void *buffer, offset_type pos, size_type bytes, const completion_handler &on_cmpl)=0
	Schedules an asynchronous write request to the file. More...

virtual void	close_remove ()
	close and remove file More...

void	delete_request_ref ()

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. More...

virtual void	export_files (offset_type offset, offset_type length, std::string prefix)

virtual int	get_physical_device_id () const

int	get_request_nref ()

virtual const char *	io_type () const
	Identifies the type of I/O implementation. More...

virtual void	lock ()=0
	Locks file for reading and writing (acquires a lock in the file system). More...

virtual void	serve (const request *req)=0 throw (io_error)

virtual void	set_size (offset_type newsize)=0
	Changes the size of the file. More...

virtual offset_type	size ()=0
	Returns size of the file. More...

Private Attributes
int	allocator_id

int	queue_id

Additional Inherited Members
Public Types inherited from stxxl::file
typedef request::offset_type	offset_type
	the offset of a request, also the size of the file More...

enum	open_mode { RDONLY = 1, WRONLY = 2, RDWR = 4, CREAT = 8, DIRECT = 16, TRUNC = 32, SYNC = 64, NO_LOCK = 128, REQUIRE_DIRECT = 256 }
	Definition of acceptable file open modes. More...

typedef request::size_type	size_type
	the size of a request More...

Static Public Member Functions inherited from stxxl::file
static int	unlink (const char *path)
	unlink path from filesystem More...

static int	truncate (const char *path, external_size_type length)
	truncate a path to given length. Use this only if you dont have a fileio-specific object, which provides truncate(). More...

Static Public Attributes inherited from stxxl::file
static const int	DEFAULT_QUEUE = -1

static const int	NO_ALLOCATOR = -1

static const int	NO_QUEUE = -2

Protected Member Functions inherited from stxxl::file
	file ()
	Initializes file object. More...

Constructor & Destructor Documentation

stxxl::disk_queued_file::disk_queued_file	(	int	queue_id,
		int	allocator_id
	)

inline

Definition at line 35 of file disk_queued_file.h.

Member Function Documentation

request_ptr stxxl::disk_queued_file::aread	(	void *	buffer,
		offset_type	pos,
		size_type	bytes,
		const completion_handler &	on_cmpl
	)

Definition at line 26 of file disk_queued_file.cpp.

request_ptr stxxl::disk_queued_file::awrite	(	void *	buffer,
		offset_type	pos,
		size_type	bytes,
		const completion_handler &	on_cmpl
	)

Definition at line 40 of file disk_queued_file.cpp.

virtual int stxxl::disk_queued_file::get_allocator_id ( ) const

inlinevirtual

Returns the file's allocator.

Returns: allocator number

Implements stxxl::file.

Definition at line 53 of file disk_queued_file.h.

virtual int stxxl::disk_queued_file::get_queue_id ( ) const

inlinevirtual

Returns the identifier of the file's queue.

Remarks: Files allocated on the same physical device usually share the same queue

Returns: queue number

Implements stxxl::file.

Definition at line 48 of file disk_queued_file.h.

Member Data Documentation

int stxxl::disk_queued_file::allocator_id

private

Definition at line 32 of file disk_queued_file.h.

int stxxl::disk_queued_file::queue_id

private

Definition at line 32 of file disk_queued_file.h.

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

include/stxxl/bits/io/disk_queued_file.h
lib/io/disk_queued_file.cpp

Detailed Description

Public Member Functions

Private Attributes

Additional Inherited Members

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation