stxxl::disk_queues Class Reference

Detailed Description

Encapsulates disk queues.

Remarks

is a singleton

Definition at line 34 of file disk_queues.h.

Inheritance diagram for stxxl::disk_queues:

Collaboration diagram for stxxl::disk_queues:

Public Member Functions
	~disk_queues ()
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 Member Functions
	disk_queues ()

Protected Attributes
request_queue_map	queues

Private Types
typedef stxxl::int64	DISKID
typedef std::map< DISKID, request_queue_type * >	request_queue_map
typedef request_queue_impl_qwqr	request_queue_type

Additional Inherited Members
Static Public Member Functions inherited from stxxl::singleton< disk_queues >
static instance_pointer	get_instance ()

Member Typedef Documentation

typedef stxxl::int64 stxxl::disk_queues::DISKID

private

Definition at line 41 of file disk_queues.h.

typedef std::map<DISKID, request_queue_type*> stxxl::disk_queues::request_queue_map

private

Definition at line 42 of file disk_queues.h.

typedef request_queue_impl_qwqr stxxl::disk_queues::request_queue_type

private

Definition at line 39 of file disk_queues.h.

Constructor & Destructor Documentation

stxxl::disk_queues::disk_queues ( )

inlineprotected

Definition at line 46 of file disk_queues.h.

References stxxl::singleton< stats >::get_instance().

stxxl::disk_queues::~disk_queues ( )

inline

Definition at line 84 of file disk_queues.h.

Member Function Documentation

void stxxl::disk_queues::add_request ( request_ptr &  req, DISKID  disk  )

inline

Definition at line 52 of file disk_queues.h.

bool stxxl::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

Definition at line 73 of file disk_queues.h.

void stxxl::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

Definition at line 96 of file disk_queues.h.

Member Data Documentation

request_queue_map stxxl::disk_queues::queues

protected

Definition at line 45 of file disk_queues.h.

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

• include/stxxl/bits/io/disk_queues.h