disk_queues Class Reference

Encapsulates disk queues. More...

#include <disk_queues.h>

Inherits singleton< disk_queues >.

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. More...
void	set_priority_op (request_queue::priority_op op)
	Changes requests priorities. More...

Protected Attributes
request_queue_map	queues

Detailed Description

Encapsulates disk queues.

Remarks

is a singleton

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