rustHow to lock a Rust HashMap?

A Rust HashMap can be locked using a Mutex or RwLock.

Example code using a Mutex:

use std::collections::HashMap;
use std::sync::Mutex;

let mut map = HashMap::new();
let mutex = Mutex::new(map);

The code above creates a HashMap and a Mutex to lock it.

To access the HashMap while it is locked, use the lock method of the Mutex:

let mut guard = mutex.lock().unwrap();
guard.insert(1, "one");

The code above acquires a lock on the Mutex and inserts a key-value pair into the HashMap.

Helpful links

• Mutex
• RwLock

Edit this code on GitHub