rust/tests/ui/threads-sendsync/task-comm-11.rs
Alex Crichton 75fa9f6dec compiletest: Add a //@ needs-threads directive
This commit is extracted from #122036 and adds a new directive to the
`compiletest` test runner, `//@ needs-threads`. This is intended to
capture the need that a target must implement threading to execute a
specific test, typically one that uses `std::thread`. This is primarily
done for WebAssembly targets which currently do not have threads by
default. This enables transitioning a lot of `//@ ignore-wasm*`-style
ignores into a more self-documenting `//@ needs-threads` directive.
Additionally the `wasm32-wasi-preview1-threads` target, for example,
does actually have threads, but isn't tested in CI at this time. This
change enables running these tests for that target, but not other wasm
targets.
2024-03-06 12:35:07 -08:00

22 lines
417 B
Rust

//@ run-pass
#![allow(unused_must_use)]
//@ pretty-expanded FIXME #23616
//@ needs-threads
use std::sync::mpsc::{channel, Sender};
use std::thread;
fn start(tx: &Sender<Sender<isize>>) {
let (tx2, _rx) = channel();
tx.send(tx2).unwrap();
}
pub fn main() {
let (tx, rx) = channel();
let child = thread::spawn(move|| {
start(&tx)
});
let _tx = rx.recv().unwrap();
child.join();
}