🔒 Rust Mutex

= a lock on data access

How?

Normal

• Mutex<T> → Mutex::new(T)
• .lock() to acquire the lock
  • blocks until mutex is obtained
  • returns MutexGuard<T>
  • released when variable is dropped

Read, write

• RwLock
  • .write() waits for exclusive, mut access
    • → max one writer
  • .read() waits for non-mut access
    • → many readers

Conditional

• std::sync::Condvar
  • .wait() → block thread
  • .notify_all() → releases blocked (via .wait()) thread