Nanny

A Rust library providing a safe API around native abstractions for Node.

Nanny collaborates with the V8 embedding API to safely monitor stack-allocated handles to garbage-collected objects. This ensures that all objects rooted in the stack are safely tracked by the garbage collector.

A good nanny keeps the nursery safe.

Example

A complete example can be found in the nanny-demo repository. The demo makes use of the rust-bindings npm package to completely automate the process of building and requiring a Rust module in Node.

A Node function in Rust

A JS function is represented in Rust as an extern function that takes a reference to a Call object. The Call object allows you to create memory management scopes, which safely manage the rooting of handles to garbage-collected JS values:

```rust

[no_mangle]

extern fn makeanarray(call: &Call) { let realm = call.realm(); // current VM execution context realm.scoped(|scope| { // create a scope for rooting handles let mut array: Handle = Array::new(scope, 3); array.set(0, Integer::new(scope, 9000)); array.set(1, Object::new(scope)); array.set(2, Number::new(scope, 3.14159)); call.activation().set_return(array); }); } ```

License

MIT