caeryn

Small protected runtime core with isolated execution contexts.

Purpose

caeryn (from Welsh caer, a fortified enclosure) provides a minimal runtime for managing isolated execution contexts. Each context has its own state, counters, output, and guard status — like rooms in a fortress.

Features

• Isolated contexts — each context has independent state and counters
• Task queue — submit tasks and run them in batch
• Guard system — pause or stop individual contexts
• Event log — track spawns and lifecycle events
• Zero dependencies

Install

cargo add caeryn

Usage

use caeryn::{Runtime, Task};

let mut rt = Runtime::new();
let ctx = rt.spawn("worker");

rt.submit(ctx, Task::SetState("role".into(), "builder".into())).unwrap();
rt.submit(ctx, Task::Increment("tasks_done".into())).unwrap();
rt.submit(ctx, Task::Echo("job finished".into())).unwrap();
rt.run_all();

let c = rt.context(ctx).unwrap();
assert_eq!(c.state("role"), Some("builder"));
assert_eq!(c.counter("tasks_done"), 1);

License

MIT OR Apache-2.0