request_with_state Class Reference [File implementations]

Request with completion state. More...

#include <request_with_state.h>

Inheritance diagram for request_with_state:

Collaboration diagram for request_with_state:

List of all members.

Public Member Functions
void	wait (bool measure_time=true)
	Suspends calling thread until completion of the request.
bool	poll ()
	Polls the status of the request.
bool	cancel ()
	Cancel a request.
Protected Types
enum	request_state { OP = 0, DONE = 1, READY2DIE = 2 }
Protected Member Functions
	request_with_state (const completion_handler &on_cmpl, file *f, void *buf, offset_type off, size_type b, request_type t)
Protected Attributes
state< request_state >	_state

---

Detailed Description

Request with completion state.

---

Member Enumeration Documentation

enum request_with_state::request_state [protected]

states of request OP - operating, DONE - request served, READY2DIE - can be destroyed

---

Member Function Documentation

bool request_with_state::cancel

(

)

[virtual]

Cancel a request.

The request is canceled unless already being processed. However, cancelation cannot be guaranteed. Canceled requests must still be waited for in order to ensure correct operation. If the request was canceled successfully, the completion handler will not be called.

Returns:

true iff the request was canceled successfully

Implements request_interface.

References file::get_queue_id().

bool request_with_state::poll

(

)

[virtual]

Polls the status of the request.

Returns:

true if request is completed, otherwise false

Implements request_interface.

References request::check_errors().

void request_with_state::wait

(

bool

measure_time = true

)

[virtual]

Suspends calling thread until completion of the request.

Implements request_interface.

References request::check_errors().

---

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

• request_with_state.h
• request_with_state.cpp