Closures are a good way to represent callbacks for non-blocking code. Although C doesn't support closures, you can achieve something similar using structs on the heap, but you can get even better memory efficiency by using JavaScript running on Microvium.| Coder Mike
Support for closures in Microvium sets it apart from other JS engines of a similar size. Closures simplify state machines and enable functional-style code. Closures in snapshots are a new way of sharing compile-time state with the runtime program. This post goes through some examples and design details.| Coder Mike