Threads, channels, Mutex, Arc, Send and Sync, async and await, futures and tokio basics.
34 cards · basic cards · AI-written, checked twice. Edit anything.
- What does thread::spawn return?
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JoinHandle<T>- What does JoinHandle::join() do?
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Blocks until the thread completes and returns Result<T, E>- What trait must a closure passed to thread::spawn implement?
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Send + 'static- What is Arc?
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Atomic Reference Counting, a thread-safe shared ownership pointer- When should you use Arc instead of Rc?
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When sharing data across multiple threads- What does Arc::clone() do?
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Increments the reference count and returns another Arc to the same data- What is Mutex?
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A lock ensuring only one thread can access the protected data at a time- What does Mutex::lock() return?
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Result<MutexGuard<T>>- What is MutexGuard?
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An RAII guard that holds the lock until it is dropped- What is the Send trait?
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A marker trait indicating a type is safe to transfer ownership between threads- What is the Sync trait?
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A marker trait indicating a type is safe to share &T references between threads- Are all Send types also Sync?
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No, Send and Sync are independent traits- What is RwLock?
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A lock allowing multiple concurrent readers or one exclusive writer- When should you prefer RwLock over Mutex?
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When you have many readers and few writers- What does mpsc::channel() return?
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(Sender<T>, Receiver<T>)
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