pubfncall_async_from_sync<Fut>(fut:Fut)->Fut::OutputwhereFut:std::future::Future+'static,Fut::Output:Send+'static,{let(tx,rx)=tokio::sync::oneshot::channel();letfut=asyncmove{matchtx.send(fut.await){Ok(res)=>res,Err(_)=>{panic!("oneshot channel closed which should not happen")...
cell_ref 跨越了 await,生成的 future 结构体成员将包含cell_ref,而&Cell<T> 不是Send或Sync的(因为Cell<T>不是Sync),所以生成的 future 既不是 Send 也不是 Sync 如下面代码将报错:future 既不是 Send 也不是 Sync #[tokio::main] async fn main() { #![feature(exclusive_wrapper)] use core::...
asyncfnget_two_sites_async() {// Create two different "futures" which, when run to completion, 创建两个不同的`future`,你可以把`future`理解为未来某个时刻会被执行的计划任务// will asynchronously download the webpages. 当两个`future`被同时执行后,它们将并发的去下载目标页面letfuture_one=downloa...
fn innocently_looking_function() {tokio::spawn(some_async_func());// ^// |// This code will panic if we remove this line. Spukhafte Fernwirkung!} // |// |fn main() { // vlet _rt = tokio::runtime::Runtime::new().unwrap();innocently_looking_function();}左右滑动查...
use reqwest::Error; use tokio::sync::mpsc; async fn fetch_url(url: String) -> Result<...
HTTP request yet.letasync_fn=reqwest::get("http://adamchalmers.com");// Wrap the async function in my hypothetical wrapper.lettimed_async_fn=TimedWrapper::new(async_fn);// Call the async function, which will send a HTTP request and time it.let(resp,time)=timed_async_fn.await;println...
missing lifetime specifier// --> src/main.rs:1:33// |// 1 | fn longest(x: &str, y: &str) -> &str {// | ^ expected lifetime parameter// |// = help: this function's return type contains a borrowed value, but the// signature does not say whether it is borrowed from `x`...
If you call.awaitin your GUI code, the UI will freeze, which is very bad UX. Instead, keep the GUI thread non-blocking and communicate with any concurrent tasks (asynctasks or other threads) with something like: Channels (e.g.std::sync::mpsc::channel). Make sure to usetry_recvso ...
rbatis 是一个用 Rust 编写的高性能、安全、动态 SQL(编译时)ORM 框架,受 Mybatis 和 MybatisPlus 的启发
Rust曾经支持绿色线程,但他们它达到1.0之前被删除了, 执行状态存储在每个栈中,因此在这样的解决方案中不需要async,await,Futures或者Pin。 典型的流程是这样的: 运行一些非阻塞代码 对某些外部资源进行阻塞调用 跳转到main”线程,该线程调度一个不同的线程来运行,并“跳转”到该栈中 ...