fidl_fuchsia_media

Enum UsageWatcherRequest

pub enum UsageWatcherRequest {
    OnStateChanged {
        usage: Usage,
        state: UsageState,
        responder: UsageWatcherOnStateChangedResponder,
    },
}

Expand description

A protocol for listening to changes to the policy state of an audio usage.

User actions, such as lowering the volume or muting a stream, are not reflected in this API.

Variants§

OnStateChanged

Called on first connection and whenever the watched usage changes. The provided usage will always be the bound usage; it is provided so that an implementation of this protocol may be bound to more than one usage.

Clients must respond to acknowledge the event. Clients that do not acknowledge their events will eventually be disconnected.

Fields

§usage: Usage

§state: UsageState

§responder: UsageWatcherOnStateChangedResponder

Implementations§

impl UsageWatcherRequest

pub fn into_on_state_changed( self, ) -> Option<(Usage, UsageState, UsageWatcherOnStateChangedResponder)>

pub fn method_name(&self) -> &'static str

Name of the method defined in FIDL

Trait Implementations§

impl Debug for UsageWatcherRequest

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

impl Freeze for UsageWatcherRequest

impl !RefUnwindSafe for UsageWatcherRequest

impl Send for UsageWatcherRequest

impl Sync for UsageWatcherRequest

impl Unpin for UsageWatcherRequest

impl !UnwindSafe for UsageWatcherRequest

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T, D> Encode<Ambiguous1, D> for T
where D: ResourceDialect,

unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more

impl<T, D> Encode<Ambiguous2, D> for T
where D: ResourceDialect,

unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> Pointable for T

const ALIGN: usize = _

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.