* Drop a reference of a udev device. If the refcount reaches zero,
* the resources of the device will be released.
*
- * Returns: the passed udev device if it has still an active reference, or #NULL otherwise.
+ * Returns: #NULL
**/
_public_ struct udev_device *udev_device_unref(struct udev_device *udev_device)
{
return NULL;
udev_device->refcount--;
if (udev_device->refcount > 0)
- return udev_device;
+ return NULL;
if (udev_device->parent_device != NULL)
udev_device_unref(udev_device->parent_device);
free(udev_device->syspath);
* Drop a reference of an enumeration context. If the refcount reaches zero,
* all resources of the enumeration context will be released.
*
- * Returns: the passed enumeration context if it has still an active reference, or #NULL otherwise.
+ * Returns: #NULL
**/
_public_ struct udev_enumerate *udev_enumerate_unref(struct udev_enumerate *udev_enumerate)
{
return NULL;
udev_enumerate->refcount--;
if (udev_enumerate->refcount > 0)
- return udev_enumerate;
+ return NULL;
udev_list_cleanup(&udev_enumerate->sysattr_match_list);
udev_list_cleanup(&udev_enumerate->sysattr_nomatch_list);
udev_list_cleanup(&udev_enumerate->subsystem_match_list);
* Drop a reference of a hwdb context. If the refcount reaches zero,
* all resources of the hwdb context will be released.
*
- * Returns: the passed hwdb context if it has still an active reference, or #NULL otherwise.
+ * Returns: #NULL
**/
_public_ struct udev_hwdb *udev_hwdb_unref(struct udev_hwdb *hwdb) {
if (!hwdb)
return NULL;
hwdb->refcount--;
if (hwdb->refcount > 0)
- return hwdb;
+ return NULL;
if (hwdb->map)
munmap((void *)hwdb->map, hwdb->st.st_size);
if (hwdb->f)
* the bound socket will be closed, and the resources of the monitor
* will be released.
*
- * Returns: the passed udev monitor if it has still an active reference, or #NULL otherwise.
+ * Returns: #NULL
**/
_public_ struct udev_monitor *udev_monitor_unref(struct udev_monitor *udev_monitor)
{
return NULL;
udev_monitor->refcount--;
if (udev_monitor->refcount > 0)
- return udev_monitor;
+ return NULL;
if (udev_monitor->sock >= 0)
close(udev_monitor->sock);
udev_list_cleanup(&udev_monitor->filter_subsystem_list);
* Drop a reference of a udev queue context. If the refcount reaches zero,
* the resources of the queue context will be released.
*
- * Returns: the passed queue context if it has still an active reference, or #NULL otherwise.
+ * Returns: #NULL
**/
_public_ struct udev_queue *udev_queue_unref(struct udev_queue *udev_queue)
{
return NULL;
udev_queue->refcount--;
if (udev_queue->refcount > 0)
- return udev_queue;
+ return NULL;
udev_list_cleanup(&udev_queue->queue_list);
free(udev_queue);
return NULL;