sim_disk_file Class Reference
[File implementations]

Implementation of disk emulation. More...

#include <simdisk_file.h>

Inheritance diagram for sim_disk_file:

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Collaboration diagram for sim_disk_file:

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List of all members.

Public Member Functions
	sim_disk_file (const std::string &filename, int mode, int disk)
	constructs file object
request_ptr	aread (void *buffer, stxxl::int64 pos, size_t bytes, completion_handler on_cmpl)
	Schedules asynchronous read request to the file.
request_ptr	awrite (void *buffer, stxxl::int64 pos, size_t bytes, completion_handler on_cmpl)
	Schedules asynchronous write request to the file.
void	set_size (stxxl::int64 newsize)
	Changes the size of the file.

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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	disk
	)			[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

request_ptr sim_disk_file::aread	(	void *	buffer,
		stxxl::int64	pos,
		size_t	bytes,
		completion_handler	on_cmpl
	)			[virtual]

Schedules asynchronous read request to the file.

Parameters:

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

Returns:

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

Implements file.

References disk_queues::add_readreq(), request_ptr::get(), and file::get_id().

request_ptr sim_disk_file::awrite	(	void *	buffer,
		stxxl::int64	pos,
		size_t	bytes,
		completion_handler	on_cmpl
	)			[virtual]

Schedules 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 object, that can be used to track the status of the operation

Implements file.

References disk_queues::add_writereq(), request_ptr::get(), and file::get_id().

void sim_disk_file::set_size

(

stxxl::int64

newsize

)

[virtual]

Changes the size of the file.

Parameters:

newsize

value of the new file size

Reimplemented from ufs_file_base.

References ufs_file_base::size().

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

• simdisk_file.h
• simdisk_file.cpp