我是Rust的新主题。我正在努力通过线程内的rustbox箱的RustBox
type。如何实现RustBox的同步?
欲按q钥匙,而且它在显示2秒钟一个+
符号(1,1),而予压瓦特那些2秒内键,其示出了另一+
在(1,2符号)。
我写了相同的逻辑一些代码:
extern crate rustbox;
use std::thread;
use std::time::Duration;
use rustbox::{Color, RustBox};
use rustbox::Key;
fn mark_at(x: usize, y: usize, rustbox: &RustBox) {
rustbox.print(x, y, rustbox::RB_BOLD, Color::Black, Color::White, "+");
thread::spawn(move || {
let delay = Duration::from_millis(2000);
thread::sleep(delay);
rustbox.print(x, y, rustbox::RB_BOLD, Color::Black, Color::White, " ");
});
}
fn main() {
let rustbox = match RustBox::init(Default::default()) {
Result::Ok(v) => v,
Result::Err(e) => panic!("{}", e),
};
rustbox.print(1, 1, rustbox::RB_BOLD, Color::Black, Color::White, " ");
rustbox.print(1, 2, rustbox::RB_BOLD, Color::Black, Color::White, " ");
loop {
rustbox.present();
match rustbox.poll_event(false) {
Ok(rustbox::Event::KeyEvent(key)) => {
match key {
Key::Char('q') => {
mark_at(1, 1, &rustbox);
}
Key::Char('w') => {
mark_at(1, 2, &rustbox);
}
Key::Esc => { break; }
_ => { }
}
},
Err(e) => panic!("{}", e),
_ => { }
}
}
}
它给我:
error[E0277]: the trait bound `*mut(): std::marker::Sync` is not satisfied in `rustbox::RustBox`
--> src/main.rs:12:5
|
12 | thread::spawn(move || {
| ^^^^^^^^^^^^^ `*mut()` cannot be shared between threads safely
|
= help: within `rustbox::RustBox`, the trait `std::marker::Sync` is not implemented for `*mut()`
= note: required because it appears within the type `std::marker::PhantomData<*mut()>`
= note: required because it appears within the type `rustbox::RustBox`
= note: required because of the requirements on the impl of `std::marker::Send` for `&rustbox::RustBox`
= note: required because it appears within the type `[[email protected]/main.rs:12:19: 16:6 rustbox:&rustbox::RustBox, x:usize, y:usize]`
= note: required by `std::thread::spawn`
error: aborting due to previous error
如何实现Sync
为RustBox
类型,这样上面的代码可以工作?
你懂的特点['Send'和'Sync'(https://doc.rust-lang.org/book/第二版/ ch16-04伸长并发同步和 - send.html)?最好你了解类型不是“同步”的含义。一个不只是实现'Sync'。相关问题: https://stackoverflow.com/q/36649865/1233251 –