stxxl::disk_queues Class Reference

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.
	~disk_queues ()
void	set_priority_op (request_queue::priority_op op)
	Changes requests priorities.
Protected Member Functions
	disk_queues ()
Protected Attributes
request_queue_map	queues
Private Types
typedef request_queue_impl_qwqr	request_queue_type
typedef stxxl::int64	DISKID
typedef std::map< DISKID, request_queue_type * >	request_queue_map

---

Detailed Description

Encapsulates disk queues.

Remarks:

is a singleton

Definition at line 35 of file disk_queues.h.

---

Member Typedef Documentation

typedef stxxl::int64 stxxl::disk_queues::DISKID [private]

Definition at line 42 of file disk_queues.h.

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

Definition at line 43 of file disk_queues.h.

typedef request_queue_impl_qwqr stxxl::disk_queues::request_queue_type [private]

Definition at line 40 of file disk_queues.h.

---

Constructor & Destructor Documentation

stxxl::disk_queues::disk_queues

(

)

[inline, protected]

Definition at line 47 of file disk_queues.h.

stxxl::disk_queues::~disk_queues

(

)

[inline]

Definition at line 85 of file disk_queues.h.

---

Member Function Documentation

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

Definition at line 53 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 74 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 97 of file disk_queues.h.

References set_priority_op().

Referenced by set_priority_op().

---

Member Data Documentation

request_queue_map stxxl::disk_queues::queues [protected]

Definition at line 46 of file disk_queues.h.

---

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

• include/stxxl/bits/io/disk_queues.h