| //! This example shows how to wrap a data structure in a mutex to achieve safe mutability. |
| extern crate lazy_static; |
| use lazy_static::lazy_static; |
| use std::collections::HashMap; |
| use std::sync::Mutex; |
| |
| lazy_static! { |
| static ref MUTEX_MAP: Mutex<HashMap<u32, &'static str>> = { |
| let mut m = HashMap::new(); |
| m.insert(0, "foo"); |
| m.insert(1, "bar"); |
| m.insert(2, "baz"); |
| Mutex::new(m) |
| }; |
| } |
| |
| fn main() { |
| MUTEX_MAP.lock().unwrap().insert(0, "boo"); |
| println!( |
| "The entry for `0` is \"{}\".", |
| MUTEX_MAP.lock().unwrap().get(&0).unwrap() |
| ); |
| } |