Interface for pending requests that can be queued. More...

Inherited by Block_device::Virtio_client< DEV >::Generic_pending_request.

Collaboration diagram for Block_device::Pending_request:

Data Structures
struct	Owner
	Base class for object that can be owner of a pending request. More...

Public Member Functions
virtual int	handle_request ()=0
	Callback used when the request is ready for processing.

virtual void	fail_request ()=0
	Callback used when a request is dropped from the queue.

virtual bool	is_owner (Owner *owner)=0
	Check if somebody is owner of this request.

Detailed Description

Interface for pending requests that can be queued.

Definition at line 20 of file request_queue.h.

Member Function Documentation

virtual void Block_device::Pending_request::fail_request ( )

pure virtual

Callback used when a request is dropped from the queue.

The function is called for notification only. The request will be destroyed.

virtual int Block_device::Pending_request::handle_request ( )

pure virtual

Callback used when the request is ready for processing.

Return values

L4_EOK	Request successfully issued. The callee has taken ownership of the request.
-L4_EBUSY	Device is still busy. The callee must not requeue the request as it will remain in the queue.
<	0 Other fatal error. The caller may dispose of the request.

virtual bool Block_device::Pending_request::is_owner ( Owner * owner )

pure virtual

Check if somebody is owner of this request.

Parameters

owner Pointer to owner to check against.

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