Macro rw_lock

macro_rules! rw_lock {
    ($val:expr) => { ... };
}

Creates a new RwLock instance.

This macro takes a value and wraps it in an RwLock, providing thread-safe access with multiple readers or a single writer. RwLock allows multiple immutable borrows or one mutable borrow at a time, enforcing read-write access at the runtime level.