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52 lines
853 B
Markdown
52 lines
853 B
Markdown
---
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date: 20200930
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id: 6e53ba2a-20e7-4d81-8047-8eecaffc76f7
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title: Rust Shared-State Concurrency
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---
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# Mutex\<T\>
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## Single thread example
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``` rust
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use std::sync::Mutex;
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fn main() {
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let m = Mutex::new(5);
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{
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let mut num = m.lock().unwrap();
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*num = 6;
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}
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println!("m = {:?}", m);
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}
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```
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## Multiple thread example
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``` rust
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use std::sync::{Arc, Mutex};
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use std::thread;
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fn main() {
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let counter = Arc::new(Mutex::new(0));
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let mut handles = vec![];
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for _ in 0..10 {
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let counter = Arc::clone(&counter);
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let handle = thread::spawn(move || {
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let mut num = counter.lock().unwrap();
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*num += 1;
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});
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handles.push(handle);
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}
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for handle in handles {
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handle.join().unwrap();
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}
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println!("Result: {}", *counter.lock().unwrap());
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}
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```
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