没错，有些sync函数非常神奇地变成了紫色：它们可以读取文件、连接线程或在couch上睡眠thread::sleep。我们不想从红色（异步）函数调用这些紫色（阻塞）函数，因为它们会阻塞运行时，并扼杀促使我们陷入异步混乱的性能优势。不幸的是，紫色函数非常吊轨：如果不检查函数的主体和调用图中所有其他函数的主体，就无法判断函数...
thread::sleep(Duration::from_millis(5000));ifcli.reconnect().is_ok() {println!("Successfully reconnected");returntrue; } }println!("Unable to reconnect after several attempts.");false}// Subscribes to multiple topics.fnsubscribe_topics(cli: &mqtt::Client) {ifletErr(e) = cli.subscribe_...
要么用新的sleep()替换self.sleeper。在返回Poll::Ready后再次轮询future是没有意义的，并且会将后果留...
*/fnpublish(client: Client) {// 订阅主题前等待一秒thread::sleep(Duration::from_secs(1)); client.subscribe("hello/+/world", QoS::AtMostOnce).unwrap();// 发送 10 条消息,长度从 0 到 9 不等,每条消息的 QoS 都设置为“至少一次”foriin0..10_usize{letpayload=vec![1; i];lettopic=format!
// Do we have totype"MyType::from"every time? // How about introducing analias? letx = MyType::from(b"bytes"); lety = MyType::from("string"); // Nope, Rust won't let us. let f = MyType::from; let x = f(b"bytes"); ...
actor.cast(MyFirstActorMessage::PrintHelloWorld).expect("Failed to send message to actor"); } //给一点时间打印所有信息 tokio::time::sleep(tokio::time::Duration::from_millis(100)).await; // Cleanup actor.stop(None); actor_handle.await.unwrap(); ...
*/fnpublish(client: Client) {// Wait for one second before subscribing to a topicthread::sleep(Duration::from_secs(1)); client.subscribe("hello/+/world", QoS::AtMostOnce).unwrap();// Send ten messages with lengths ranging from 0 to 9, each message's QoS being at least onceforiin...
// Do we have to type "MyType::from" every time? // How about introducing an alias? let x = MyType::from(b"bytes"); let y = MyType::from("string"); // Nope, Rust won't let us. let f = MyType::from; let x = f(b"bytes"); ...
tokio::time::sleep(Duration::from_secs(1)).await; //do not mess server println functions // Echo stream that sends 17 requests then graceful end that connection println!("\r\nBidirectional stream echo:"); bidirectional_streaming_echo(&mut client, 17).await; ...
read_to_end(&mut buffer).unwrap(); } fn main() { loop { test1(); test2(); } } 程序中一共有两种会导致进程被调度出CPU的任务,一个是test1()函数中的sleep(),一个是在test2()函数中的读文件操作。 这里需要使用debug编译,因为offcputime-bpfcc依赖于frame pointer来进行栈展开,所以我们需要开启...