disk_queues Class Reference [I/O primitives layer]

Encapsulates disk queues. More...

#include <disk_queues.h>

List of all members.

Public Member Functions
void	add_request (request_ptr &req, DISKID disk)
bool	cancel_request (request_ptr &req, DISKID disk)
	Cancel a request The specified request is canceled unless already being processed. However, cancelation cannot be guaranteed. Cancelled requests must still be waited for in order to ensure correct operation.
void	set_priority_op (request_queue::priority_op op)
	Changes requests priorities.
Protected Attributes
request_queue_map	queues

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Detailed Description

Encapsulates disk queues.

Remarks:

is a singleton

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Member Function Documentation

bool disk_queues::cancel_request	(	request_ptr &	req,
		DISKID	disk
	)			[inline]

Cancel a request The specified request is canceled unless already being processed. However, cancelation cannot be guaranteed. Cancelled requests must still be waited for in order to ensure correct operation.

Parameters:

	req	request to cancel
	disk	disk number for disk that req was scheduled on

Returns:

true iff the request was canceled successfully

void disk_queues::set_priority_op

(

request_queue::priority_op

op

)

[inline]

Changes requests priorities.

Parameters:

op

one of: READ, read requests are served before write requests within a disk queue WRITE, write requests are served before read requests within a disk queue NONE, read and write requests are served by turns, alternately

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

• disk_queues.h