usetokio::signal;#[tokio::main]asyncfnmain(){// ... spawn application as separate task ...matchsignal::ctrl_c().await{Ok(())=>
容易犯的错误是,希望异步非阻塞时,对所有 async block/fn 进行了 await,而没有进行任务化处理(即把 Future 通过 spwan 函数转化成任务): 代码语言:javascript 复制 use std::time::Instant;use tokio::time::{sleep,Duration};#[tokio::main]asyncfnmain(){letnow=Instant::now();letmut handles=Vec::wit...
use tokio::sync::mpsc;use tokio::time::{sleep,Duration};asyncfnfuture1()->String{sleep(Duration::from_secs(1)).await;String::from("future1")}#[tokio::main]asyncfnmain(){let(tx,mut rx)= mpsc::channel(10); tokio::spawn(asyncmove{foriin1..=5{ tx.send(i).await.unwrap();...
async fn read read 是一个异步方法可以将数据读入缓冲区( buffer )中,然后返回读取的字节数。 use tokio::fs::File; use tokio::io::{self, AsyncReadExt}; #[tokio::main] async fn main() -> io::Result<()> { let mut f = File::open("foo.txt").await?; let mut buffer = [0; 10]...
可以使用 tokio::main 宏去便捷的创建运行时 #[tokio::main] async fn main() { println!("Hello world"); } 这等同于以下代码: fn main() { tokio::runtime::Builder::new_multi_thread() .enable_all() .build() .unwrap() .block_on(async { println!("Hello world"); }) } ...
use tokio::fs::File;use tokio::io::{self,AsyncReadExt};#[tokio::main]asyncfnmain()-> io::Result<()>{letmutfile=File::open("test.txt").await?;letmutbuffer=Vec::new(); file.read_to_end(&mut buffer).await?;println!("The bytes read: {:?}", buffer);Ok(())} 这个示例演示...
usetokio::time::{self,Duration};#[tokio::main]async fn main(){ let handle=tokio::spawn(async {// do some worktokio::time::sleep(Duration::from_secs(10)).await;println!("Task completed");});// 100毫秒后取消任务time::sleep(Duration::from_millis(100)).await;drop(handle);println!(...
Tokio任务是一个异步绿色线程,它们通过向tokio::spawn中传递一个async块来创建。tokio::spawn函数返回一个JoinHandle,调用者可能使用它来与被创建的任务交互。async块可能有一个返回值,调用者可以通过在JoinHandle上.await来获取这个返回值。 #[tokio::main]asyncfnmain(){lethandle=tokio::spawn(async{// Do some...
use tokio::sync::mpsc;use mini_redis::client;use mini_redis::Command::*;use bytes::Bytes;//先定义redis的命令类型#[derive(Debug)]enumCommand{Get{key:String,},Set{key:String,val:Bytes,}}#[tokio::main]asyncfnmain(){//首先建立MPSC模式的通道let(tx,mut rx)=mpsc::channel(32);//消费者...
use tokio::signal::unix::{Signal, SIGTERM, SIGINT};use tokio::time::{sleep,Duration};use tokio::task::spawn_blocking;const GRACEFUL_SHUTDOWN_TIMEOUT:u64=30;#[tokio::main]asyncfnmain()->Result<(),Box<dyn std::error::Error>>{// 创建信号监听器letmutsigterm=Signal::new(SIGTERM)?;let...