Struct sp_io::Crossing

pub struct Crossing<T: Encode + Decode>(_);

Crossing is a helper wrapping any Encode-Decodeable type for transferring over the wasm barrier.

Implementations

impl<T: Encode + Decode> Crossing<T>

pub fn into_inner(self) -> T

Convert into the inner type

Examples found in repository

src/lib.rs (line 1510)

	fn enabled(&mut self, metadata: Crossing<sp_tracing::WasmMetadata>) -> bool {
		let metadata: &tracing_core::metadata::Metadata<'static> = (&metadata.into_inner()).into();
		tracing::dispatcher::get_default(|d| d.enabled(metadata))
	}

	/// Open a new span with the given attributes. Return the u64 Id of the span.
	///
	/// On the native side this goes through the default `tracing` dispatcher to register the span
	/// and then calls `clone_span` with the ID to signal that we are keeping it around on the wasm-
	/// side even after the local span is dropped. The resulting ID is then handed over to the wasm-
	/// side.
	fn enter_span(&mut self, span: Crossing<sp_tracing::WasmEntryAttributes>) -> u64 {
		let span: tracing::Span = span.into_inner().into();
		match span.id() {
			Some(id) => tracing::dispatcher::get_default(|d| {
				// inform dispatch that we'll keep the ID around
				// then enter it immediately
				let final_id = d.clone_span(&id);
				d.enter(&final_id);
				final_id.into_u64()
			}),
			_ => 0,
		}
	}

	/// Emit the given event to the global tracer on the native side
	fn event(&mut self, event: Crossing<sp_tracing::WasmEntryAttributes>) {
		event.into_inner().emit();
	}

Trait Implementations

impl<T> Decode for Crossing<T>where
    T: Decode + Encode + Decode,

fn decode<__CodecInputEdqy: Input>(
    __codec_input_edqy: &mut __CodecInputEdqy
) -> Result<Self, Error>

Attempt to deserialise the value from input.

fn skip<I>(input: &mut I) -> Result<(), Error>where
    I: Input,

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl<T> Default for Crossing<T>where
    T: Default + Encode + Decode,

fn default() -> Self

Returns the “default value” for a type.

impl<T> Encode for Crossing<T>where
    T: Encode + Encode + Decode,

fn encode_to<__CodecOutputEdqy: Output + ?Sized>(
    &self,
    __codec_dest_edqy: &mut __CodecOutputEdqy
)

Convert self to a slice and append it to the destination.

fn encode(&self) -> Vec<u8>

Convert self to an owned vector.

fn using_encoded<R, F: FnOnce(&[u8]) -> R>(&self, f: F) -> R

Convert self to a slice and then invoke the given closure with it.

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding.

fn encoded_size(&self) -> usize

Calculates the encoded size.

impl<T: Encode + Decode> PassBy for Crossing<T>

type PassBy = Codec<Crossing<T>>

The strategy that should be used to pass the type.

impl<T> EncodeLike<Crossing<T>> for Crossing<T>where
    T: Encode + Encode + Decode,