When is the read lock dropped and released in this Rust snippet? And is there a deadlock in this snippet? You may not assume anything about which edition it is compiled and run in.
fn f(value: &RwLock
if let Some(x) = *value.read().unwrap() {
println!("value is {x}");
} else {
let mut v = value.write().unwrap();
if v.is_none() {
*v = Some(true);
}
}
}
