Rust by example (rbe) is a collection of runnable examples that illustrate various rust concepts and standard libraries. If youd like to wait for a processchild to finish, you must call childwait, which will return a processexitstatus. Use stdprocesscommand fn main() let mut child commandnew(sleep). Unwrap() println!(reached end of main) initialize the future, moving it from a completed to waiting state. This function is mostly only useful inside a poll function (when you have a cx variable to hand).
After calling this, you should return pollpending as the given waker has been successfully registered in the wait list. A callback must be supplied to call in the event that the future has been woken but was cancelled before it could complete. You will often want to re-call lockedexclusivewakeone in this case to pass on the notification to someone else. To demonstrate how it works, we will start with following code fn main() println!(hello, world!) fn getmypods() println!(get all my pods in default namespace) lets make the getmypods function asynchronous. We will use the async keyword to do that fn main() println!(hello, world!) async fn getmypods() println!(get all my pods in default namespace) the reason for all of this is that rust has no way to set a socket connection timeout so i have no way to ensure the program wont get stuck.
Ker i have some hopes that maybe someone would see this example in rust and will say oh, you cant set timeout but you can do x so ill leave the specific tcp socket example in the hope of this will come true ) ba7a7chy. A stream combinator which converts an asynchronous stream to a blocking iterator. Created by the streamwait method, this function transforms any stream into a standard iterator. This is implemented by blocking the current thread while items on the underlying stream arent ready yet.
Now we need to install color-eyre as the default panic handler, and i snuck in some environment variable modification so we get backtraces by default. Use coloreyrereport tokiomain async fn main() - result(), report setup()? Println!(hello from a (so far completely unnecessary) async runtime) ok(()). Fn setup() - result(), report if stdenvvar(rustlibbacktrace). .