udev_queue

udev_queue — access to currently active events

Functions

Types and Values

struct udev_queue

Object Hierarchy


Description

This exports the current state of the udev processing queue.

Functions

udev_queue_ref ()

struct udev_queue *
udev_queue_ref (struct udev_queue *udev_queue);

Take a reference of a udev queue context.

Parameters

udev_queue

udev queue context

 

Returns

the same udev queue context.


udev_queue_unref ()

struct udev_queue *
udev_queue_unref (struct udev_queue *udev_queue);

Drop a reference of a udev queue context. If the refcount reaches zero, the resources of the queue context will be released.

Parameters

udev_queue

udev queue context

 

Returns

NULL


udev_queue_get_udev ()

struct udev *
udev_queue_get_udev (struct udev_queue *udev_queue);

Retrieve the udev library context the queue context was created with.

Parameters

udev_queue

udev queue context

 

Returns

the udev library context.


udev_queue_new ()

struct udev_queue *
udev_queue_new (struct udev *udev);

The initial refcount is 1, and needs to be decremented to release the resources of the udev queue context.

Parameters

udev

udev library context

 

Returns

the udev queue context, or NULL on error.


udev_queue_get_udev_is_active ()

int
udev_queue_get_udev_is_active (struct udev_queue *udev_queue);

Check if udev is active on the system.

Parameters

udev_queue

udev queue context

 

Returns

a flag indicating if udev is active.


udev_queue_get_queue_is_empty ()

int
udev_queue_get_queue_is_empty (struct udev_queue *udev_queue);

Check if udev is currently processing any events.

Parameters

udev_queue

udev queue context

 

Returns

a flag indicating if udev is currently handling events.


udev_queue_get_seqnum_is_finished ()

int
udev_queue_get_seqnum_is_finished (struct udev_queue *udev_queue,
                                   unsigned long long int seqnum);

This function is deprecated, it just returns the result of udev_queue_get_queue_is_empty().

Parameters

udev_queue

udev queue context

 

seqnum

sequence number

 

Returns

a flag indicating if udev is currently handling events.


udev_queue_get_seqnum_sequence_is_finished ()

int
udev_queue_get_seqnum_sequence_is_finished
                               (struct udev_queue *udev_queue,
                                unsigned long long int start,
                                unsigned long long int end);

This function is deprecated, it just returns the result of udev_queue_get_queue_is_empty().

Parameters

udev_queue

udev queue context

 

start

first event sequence number

 

end

last event sequence number

 

Returns

a flag indicating if udev is currently handling events.


udev_queue_get_queued_list_entry ()

struct udev_list_entry *
udev_queue_get_queued_list_entry (struct udev_queue *udev_queue);

This function is deprecated.

Parameters

udev_queue

udev queue context

 

Returns

NULL.


udev_queue_get_kernel_seqnum ()

unsigned long long int
udev_queue_get_kernel_seqnum (struct udev_queue *udev_queue);

This function is deprecated.

Parameters

udev_queue

udev queue context

 

Returns

0.


udev_queue_get_udev_seqnum ()

unsigned long long int
udev_queue_get_udev_seqnum (struct udev_queue *udev_queue);

This function is deprecated.

Parameters

udev_queue

udev queue context

 

Returns

0.


udev_queue_get_fd ()

int
udev_queue_get_fd (struct udev_queue *udev_queue);

Parameters

udev_queue

udev queue context

 

Returns

a file descriptor to watch for a queue to become empty.


udev_queue_flush ()

int
udev_queue_flush (struct udev_queue *udev_queue);

Parameters

udev_queue

udev queue context

 

Returns

the result of clearing the watch for queue changes.

Types and Values

struct udev_queue

struct udev_queue;

Opaque object representing the current event queue in the udev daemon.