Function spawn_named 

pub fn spawn_named<F, T, N: Into<String>>(name: N, f: F) -> JoinHandle<T>
where
    F: FnOnce() -> T + Send + 'static,
    T: Send + 'static,

Spawn a new named thread.

Sets the OS thread name and tracks the thread in active_named_thread_count. The counter is decremented automatically when f returns.

Panics

Panics if the OS refuses to create the thread.