在 Rust 编程中使用线程
我们知道进程是处于运行状态的程序。操作系统同时维护和管理多个进程。这些进程在独立的部分上运行，这些独立的部分被称为线程。
Rust提供了1:1线程的实现。它提供了不同的API来处理线程创建、连接和许多此类方法的情况。
使用spawn创建一个新线程
为了在Rust中创建一个新线程，我们调用thread::spawn函数，然后传递给它一个闭包，该闭包包含我们想要在新线程中运行的代码。
示例
考虑下面显示的示例：
use std::thread;
use std::time::Duration;
fn main() {
thread::spawn(|| {
for i in 1..10 {
println!("hey number {} from the spawned thread!", i);
thread::sleep(Duration::from_millis(1));
}
});
for i in 1..3 {
println!("hey number {} from the main thread!", i);
thread::sleep(Duration::from_millis(1));
}
}输出结果hey number 1 from the main thread! hey number 1 from the spawned thread! hey number 2 from the main thread! hey number 2 from the spawned thread!
生成的线程有可能无法运行，为了处理这种情况，我们将从thread::spawn返回的值存储在一个变量中。thread::spawn的返回类型是JoinHandle。
一个JoinHandle是一家拥有价值，当我们调用其join方法，将等待它的线程完成
示例
让我们稍微修改上面显示的示例，如下所示：
use std::thread;
use std::time::Duration;
fn main() {
let handle = thread::spawn(|| {
for i in 1..10 {
println!("hey number {} from the spawned thread!", i);
thread::sleep(Duration::from_millis(1));
}
});
handle.join().unwrap();
for i in 1..5 {
println!("hey number {} from the main thread!", i);
thread::sleep(Duration::from_millis(1));
}
}输出结果hey number 1 from the spawned thread! hey number 2 from the spawned thread! hey number 3 from the spawned thread! hey number 4 from the spawned thread! hey number 5 from the spawned thread! hey number 6 from the spawned thread! hey number 7 from the spawned thread! hey number 8 from the spawned thread! hey number 9 from the spawned thread! hey number 1 from the main thread! hey number 2 from the main thread!