Rust 程式設計影片教程（進階）——016_2 建立執行緒與等待執行緒結束

頭條地址：https://www.ixigua.com/i677586170644791348...
Ｂ站地址：https://www.bilibili.com/video/av81202308/

github地址：https://github.com/anonymousGiga/learn_rus...

1、建立執行緒
（1）方法：呼叫thread::spawn即可

（2）例子：

use std::thread;
use std::time::Duration;

fn main() {
    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));
    }
}

2、等待執行緒結束
上面的例子中，在主執行緒結束之前並不能保證所有子執行緒都結束了（主執行緒提前結束，就不能保證這些子執行緒都執行了），因此透過以下方法等待子執行緒結束。

（1）方法：join

（2）例子1：

use std::thread;
use std::time::Duration;

fn main() {
    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();
}

（3）例子2：

use std::thread;
use std::time::Duration;

fn main() {
    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));
    }
}

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