disk_queued_file Class Reference [File implementations]

Implementation of some file methods based on serving_request. More...

#include <disk_queued_file.h>

Inheritance diagram for disk_queued_file:

Collaboration diagram for disk_queued_file:

List of all members.

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)
	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.

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Detailed Description

Implementation of some file methods based on serving_request.

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Member Function Documentation

__STXXL_BEGIN_NAMESPACE request_ptr disk_queued_file::aread	(	void *	buffer,
		offset_type	pos,
		size_type	bytes,
		const completion_handler &	on_cmpl
	)			[virtual]

Schedules an asynchronous read request to the file.

Parameters:

	buffer	pointer to memory buffer to read into
	pos	file position to start read from
	bytes	number of bytes to transfer
	on_cmpl	I/O completion handler

Returns:

request_ptr request object, which can be used to track the status of the operation

Implements file.

References get_queue_id().

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

Schedules an asynchronous write request to the file.

Parameters:

	buffer	pointer to memory buffer to write from
	pos	starting file position to write
	bytes	number of bytes to transfer
	on_cmpl	I/O completion handler

Returns:

request_ptr request object, which can be used to track the status of the operation

Implements file.

References get_queue_id().

virtual int disk_queued_file::get_allocator_id

(

)

const [inline, virtual]

Returns the file's allocator.

Returns:

allocator number

Implements file.

virtual int disk_queued_file::get_queue_id

(

)

const [inline, virtual]

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 file.

Referenced by aread(), and awrite().

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

• disk_queued_file.h
• disk_queued_file.cpp