Trait Runtime 

pub trait Runtime:
    Send
    + Sync
    + 'static {
    // Required methods
    fn spawn(&self, fut: BoxFuture<()>) -> SpawnHandle;
    fn sleep(&self, duration: Duration) -> BoxFuture<()>;
    fn now_monotonic(&self) -> Instant;
    fn now_wall_clock(&self) -> SystemTime;
}

Available on crate feature std only.

Async runtime abstraction.

Every method takes &self so a single runtime handle (typically wrapped in Arc<dyn Runtime>) can be shared across spawned tasks.

Required Methods

fn spawn(&self, fut: BoxFuture<()>) -> SpawnHandle

Spawn a future to run on the runtime. The returned SpawnHandle can be abort()-ed to request cancellation; dropping the handle detaches the task without cancelling it.

fn sleep(&self, duration: Duration) -> BoxFuture<()>

Yield control for at least duration.

fn now_monotonic(&self) -> Instant

Monotonic instant — strictly non-decreasing across calls on the same runtime. Used for RTT measurement, retry timers, and any duration arithmetic that must not be affected by wall-clock skew.

fn now_wall_clock(&self) -> SystemTime

Wall-clock time. May jump forward or backward as the system clock is adjusted. Used for timestamp-bound material (cookie buckets, PoW challenge expiry).

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl Runtime for EmbeddedRuntime

Available on crate feature embedded only.

impl Runtime for TokioRuntime