把async block/fn 变成任务,然后调用Runtime::block_on(等价地,对任务 await)来执行许多任务。 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::{sl...
block_on(async{ tokio::spawn(async { tokio::time::sleep(Duration::from_secs(1)).await; println!("Hello World"); }).await?; })?; Ok(()) } 现在成功运行了,成功打印了"Hello World",因为block_on在内部调用了Runtime::enter方法,进入了上下文...
letrt= tokio::runtime::Builder::new_multi_thread().enable_all().build().unwrap(); rt.block_on(asyncmove{ // some task with loop inner loop{ } }); let runtime = tokio::runtime::Builder::new_current_thread().build()?; block_on 方法非常常用,可以用于在同步方法中调用异步方法。 2...
let rt = tokio::runtime::Builder::new_multi_thread().enable_all().build().unwrap(); rt.block_on(async move { // some task with loop inner loop{ } }); ``` let runtime = tokio::runtime::Builder::new_current_thread().build()?; block_on 方法非常常用,可以用于在同步方法中调用异...
但是怎样证明 rt.block_on 方法阻塞了当前线程的同时, 还有其他的线程在执行任务呢? use std::time::Duration; fn main() { println!("Main thread: {:?}", std::thread::current().id()); let rt = tokio::runtime::Runtime::new().unwrap(); rt.spawn(async move { println!( "[{:?}] ...
把async block/fn 变成任务,然后调用Runtime::block_on (等价地,对任务 await)来执行许多任务。 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): ...
.on_thread_start(move || { core_affinity::set_for_current(core_id.clone()); }) .enable_all() .build() .unwrap(); rt.block_on(async { for i in 0..8 { println!("num {}", i); tokio::spawn(async move { loop { let mut sum: i32 = 0; ...
.on_thread_start(move || { core_affinity::set_for_current(core_id.clone()); }) .enable_all() .build() .unwrap(); rt.block_on(async { for i in 0..8 { println!("num {}", i); tokio::spawn(async move { loop { let mut sum: i32 = 0; ...
#[tokio::main]asyncfnmain(){println!("Helloworld.")}fnmain(){tokio::runtime::Builder::new_multi_thread().enable_all().build().unwrap().block_on(async{println!("Helloworld.");})} Create aand call usetokio::net::ToSocketAddrs;usetokio::runtime::Runtime;pubusecrate::client::Message...
rt.block_on(async { for i in 0..100 { println!("run {}", i); while set.len() >= max_task { set.join_next().await; } set.spawn(async move { sleep().await; println!("spawn {}", i); }); } while set.len() > 0 { ...