多线程之间的通信和内存共享常见方式
use std::sync::mpsc;
use std::thread;
use std::sync::{Arc,Mutex};
struct User {
name: String
}
fn main() {
// Arc 通过共享内存 在线程间通信 数据不可修改(所以这里使用的不可变引用)
let usr_raw = Arc::new(User{ name: "Bob".to_string()});
let usr = usr_raw.clone();
let t1 = thread::spawn(move ||{
println!("name :{}",&usr.name);
});
let usr = usr_raw.clone();
let t2 = thread::spawn(move ||{
println!("name :{}",&usr.name);
});
t1.join().unwrap();
t2.join().unwrap();
// 通过共享内存 在线程间通信 数据可修改，Mutex保证了数据可在线程间被安全的修改(一次只被一个线程修改)
let raw = Arc::new(Mutex::new(0));
let mut handle = vec![];
for i in 0..5 {
let raw = Arc::clone(&raw);
let h = thread::spawn(move || {
println!("thread :{}", i );
*raw.lock().unwrap() += 1;
});
handle.push(h);
}
for i in handle {
i.join().unwrap();
}
print!("{}",raw.lock().unwrap());
// 通过通信 在线程间共享数据
let (tx,rx) = mpsc::channel();
let tx2 = mpsc::Sender::clone(&tx); // let tx2 = tx.clone();
thread::spawn(move || {
let df = vec!["java","perl","python"];
for i in df {
println!("tx2 send {}",i);
tx2.send(i).unwrap();
}
});
thread::spawn(move || {
let df = vec!["java","c","cpp","rust"];
for i in df {
println!("tx send {}",i);
tx.send(i).unwrap();
}
});
for ret in rx {
println!("tx recv : {}", ret);
}
}