Rust语言学习笔记（8）

线程

// 子线程
thread::spawn(|| {
    for i in 1..10 {
        println!("hi number {} from the spawned thread!", i);
        thread::sleep(Duration::from_millis(1));
    }
});
// 主线程
for i in 1..5 {
    println!("hi number {} from the main thread!", i);
    thread::sleep(Duration::from_millis(1));
}
// 主线程结束后子线程被中止
/*
hi number 1 from the main thread!
hi number 1 from the spawned thread!
hi number 2 from the main thread!
hi number 2 from the spawned thread!
hi number 3 from the main thread!
hi number 3 from the spawned thread!
hi number 4 from the main thread!
hi number 4 from the spawned thread!
hi number 5 from the spawned thread!
*/
// join 连结主线程和子线程
let handle = thread::spawn(|| {
    for i in 1..10 {
        println!("hi number {} from the spawned thread!", i);
        thread::sleep(Duration::from_millis(1));
    }
});
for i in 1..5 {
    println!("hi number {} from the main thread!", i);
    thread::sleep(Duration::from_millis(1));
}
handle.join().unwrap();
/*
hi number 1 from the main thread!
hi number 2 from the main thread!
hi number 1 from the spawned thread!
hi number 3 from the main thread!
hi number 2 from the spawned thread!
hi number 4 from the main thread!
hi number 3 from the spawned thread!
hi number 4 from the spawned thread!
hi number 5 from the spawned thread!
hi number 6 from the spawned thread!
hi number 7 from the spawned thread!
hi number 8 from the spawned thread!
hi number 9 from the spawned thread!
*/
let handle = thread::spawn(|| {
    for i in 1..10 {
        println!("hi number {} from the spawned thread!", i);
        thread::sleep(Duration::from_millis(1));
    }
});
handle.join().unwrap();
for i in 1..5 {
    println!("hi number {} from the main thread!", i);
    thread::sleep(Duration::from_millis(1));
}
/*
hi number 1 from the spawned thread!
hi number 2 from the spawned thread!
hi number 3 from the spawned thread!
hi number 4 from the spawned thread!
hi number 5 from the spawned thread!
hi number 6 from the spawned thread!
hi number 7 from the spawned thread!
hi number 8 from the spawned thread!
hi number 9 from the spawned thread!
hi number 1 from the main thread!
hi number 2 from the main thread!
hi number 3 from the main thread!
hi number 4 from the main thread!
*/
// 由于子线程中的闭包的生命期和主线程可能不一致
// 所以必须使用移动捕获来转移主线程中资源的所有权
let v = vec![1, 2, 3];
let handle = thread::spawn(move || {
    println!("Here's a vector: {:?}", v);
});
handle.join().unwrap();