/** Signal that an input device event is being waited for.
* @param _device Device to wait for.
* @param data Handle-specific data pointer (unused).
* @param event Event to wait for.
* @param sync Synchronisation pointer.
* @return Status code describing result of the operation. */
static status_t input_device_wait(device_t *_device, void *data, int event, void *sync) {
input_device_t *device = _device->data;
switch(event) {
case DEVICE_EVENT_READABLE:
if(semaphore_count(&device->sem)) {
object_wait_signal(sync);
} else {
notifier_register(&device->data_notifier, object_wait_notifier, sync);
}
return STATUS_SUCCESS;
default:
return STATUS_INVALID_EVENT;
}
}
void object_wait_notifier(void *data)
{
object_wait_signal(data);
}
