struct SndBackend {
cfg: virtio_snd_config,
avail_features: u64,
acked_features: u64,
acked_protocol_features: VhostUserProtocolFeatures,
workers: [Option<WorkerState<Rc<RwLock<Queue>>, Result<(), Error>>>; 4],
response_workers: [Option<WorkerState<Rc<RwLock<Queue>>, Result<(), Error>>>; 2],
snd_data: Rc<SndData>,
streams: Rc<RwLock<Vec<RwLock<StreamInfo>>>>,
tx_send: UnboundedSender<PcmResponse>,
rx_send: UnboundedSender<PcmResponse>,
tx_recv: Option<UnboundedReceiver<PcmResponse>>,
rx_recv: Option<UnboundedReceiver<PcmResponse>>,
}
Fields§
§cfg: virtio_snd_config
§avail_features: u64
§acked_features: u64
§acked_protocol_features: VhostUserProtocolFeatures
§workers: [Option<WorkerState<Rc<RwLock<Queue>>, Result<(), Error>>>; 4]
§response_workers: [Option<WorkerState<Rc<RwLock<Queue>>, Result<(), Error>>>; 2]
§snd_data: Rc<SndData>
§streams: Rc<RwLock<Vec<RwLock<StreamInfo>>>>
§tx_send: UnboundedSender<PcmResponse>
§rx_send: UnboundedSender<PcmResponse>
§tx_recv: Option<UnboundedReceiver<PcmResponse>>
§rx_recv: Option<UnboundedReceiver<PcmResponse>>
Implementations§
source§impl SndBackend
impl SndBackend
pub fn new(params: Parameters) -> Result<Self>
Trait Implementations§
source§impl VhostUserDevice for SndBackend
impl VhostUserDevice for SndBackend
source§fn max_queue_num(&self) -> usize
fn max_queue_num(&self) -> usize
The maximum number of queues that this backend can manage.
source§fn ack_features(&mut self, value: u64) -> Result<()>
fn ack_features(&mut self, value: u64) -> Result<()>
Acknowledges that this set of features should be enabled.
source§fn acked_features(&self) -> u64
fn acked_features(&self) -> u64
Returns the set of enabled features.
source§fn protocol_features(&self) -> VhostUserProtocolFeatures
fn protocol_features(&self) -> VhostUserProtocolFeatures
The set of protocol feature bits that this backend supports.
source§fn ack_protocol_features(&mut self, features: u64) -> Result<()>
fn ack_protocol_features(&mut self, features: u64) -> Result<()>
Acknowledges that this set of protocol features should be enabled.
source§fn acked_protocol_features(&self) -> u64
fn acked_protocol_features(&self) -> u64
Returns the set of enabled protocol features.
source§fn read_config(&self, offset: u64, data: &mut [u8])
fn read_config(&self, offset: u64, data: &mut [u8])
Reads this device configuration space at
offset
.source§fn start_queue(
&mut self,
idx: usize,
queue: Queue,
_mem: GuestMemory,
doorbell: Interrupt
) -> Result<()>
fn start_queue( &mut self, idx: usize, queue: Queue, _mem: GuestMemory, doorbell: Interrupt ) -> Result<()>
Indicates that the backend should start processing requests for virtio queue number
idx
.
This method must not block the current thread so device backends should either spawn an
async task or another thread to handle messages from the Queue.source§fn stop_queue(&mut self, idx: usize) -> Result<Queue>
fn stop_queue(&mut self, idx: usize) -> Result<Queue>
Indicates that the backend should stop processing requests for virtio queue number
idx
.
This method should return the queue passed to start_queue
for the corresponding idx
.
This method will only be called for queues that were previously started by start_queue
.fn restore(&mut self, data: Vec<u8>) -> Result<()>
source§fn stop_non_queue_workers(&mut self) -> Result<()>
fn stop_non_queue_workers(&mut self) -> Result<()>
Used to stop non queue workers that
VhostUserDevice::stop_queue
can’t stop. May or may
not also stop all queue workers.source§fn write_config(&self, _offset: u64, _data: &[u8])
fn write_config(&self, _offset: u64, _data: &[u8])
writes
data
to this device’s configuration space at offset
.Returns the device’s shared memory region if present.
source§fn set_backend_req_connection(&mut self, _conn: Arc<VhostBackendReqConnection>)
fn set_backend_req_connection(&mut self, _conn: Arc<VhostBackendReqConnection>)
Accepts
VhostBackendReqConnection
to conduct Vhost backend to frontend message
handling. Read moreAuto Trait Implementations§
impl !RefUnwindSafe for SndBackend
impl !Send for SndBackend
impl !Sync for SndBackend
impl Unpin for SndBackend
impl !UnwindSafe for SndBackend
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere T: Any,
§fn into_any(self: Box<T, Global>) -> Box<dyn Any, Global>
fn into_any(self: Box<T, Global>) -> Box<dyn Any, Global>
Convert
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
.§fn into_any_rc(self: Rc<T, Global>) -> Rc<dyn Any, Global>
fn into_any_rc(self: Rc<T, Global>) -> Rc<dyn Any, Global>
Convert
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Convert
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s.§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s.