Async I/O Model Guide

Turso uses cooperative yielding with explicit state machines instead of Rust async/await.

Core Types

pub enum IOCompletions {
    Single(Completion),
}

#[must_use]
pub enum IOResult<T> {
    Done(T),      // Operation complete, here's the result
    IO(IOCompletions),  // Need I/O, call me again after completions finish
}

Functions returning IOResult must be called repeatedly until Done.