Trait Spawn 

pub trait Spawn:
    Send
    + Sync
    + 'static {
    // Required methods
    fn spawn(&self, fut: BoxFuture<()>);
    fn spawn_blocking(&self, task: Box<dyn FnOnce() + Send + 'static>);
}

An executor that runs futures away from the tick loop.

Implementations own their worker threads and outlive every future they are handed, so Self::spawn is fire-and-forget: a task that wants to report back to the world pushes a Command onto the CommandQueue, which the next tick drains on the main thread.

Required Methods

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

Run fut to completion on the executor and return immediately.

Dropping the returned unit does not cancel the task; there is no handle, by design. Cancellation, timeouts, and result delivery are the future’s own business, which keeps the seam free of executor-specific join-handle types.

fn spawn_blocking(&self, task: Box<dyn FnOnce() + Send + 'static>)

Run a blocking closure on the executor’s blocking pool.

For work that parks the calling thread (a synchronous file read, a platform dialog with no async form). Implementations that have no separate pool may run it on a plain thread.

Implementors