await promise awaits for the promise to resolve and returns the result.

⚠️ This may only be called on the main thread on which Lwt runs from inside a fiber started through run.

Signature for a module that Picos_lwt.run requires for interoperating with the system that Lwt runs on.

run (module System) main runs the main program implemented in Picos as a promise with Lwt as the scheduler using the given System module. In other words, the main program will be run as a Lwt promise or fiber.

ℹ️ Inside main you can use anything implemented in Picos for concurrent programming. In particular, you only need to call run with a System module implementation at the entry point of your application.

The optional forbid argument defaults to false and determines whether propagation of cancelation is initially allowed.

⚠️ This may only be called on the main thread on which Lwt runs.