Function apply_elixir_fun 

pub fn apply_elixir_fun<'a>(
    env: Env<'a>,
    pid_or_name: Term<'a>,
    fun: Term<'a>,
    parameters: Term<'a>,
) -> Result<ElixirFunCallResult, Error>

Will run fun with the parameters parameters on the process indicated by pid_or_name.

‘Raises’ an ArgumentError (e.g. returns Err(Error::BadArg) on the Rust side) if fun is not a function or parameters is not a list.

Even with proper parameters, the function call itself might fail. All various scenarios are handled by the ElixirFunCallResult type.

Notes

• It waits for a maximum of 5000 milliseconds before returning an Ok(TimedOut).
• Be sure to register any NIF that calls this function as a ‘Dirty CPU NIF’! (by using #[rustler::nif(schedule = "DirtyCpu")]). This is important for two reasons:
  1. calling back into Elixir might indeed take quite some time.
  2. we want to prevent schedulers to wait for themselves, which might otherwise sometimes happen.