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https://github.com/rust-lang/rust
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75fa9f6dec
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.
64 lines
1.5 KiB
Rust
64 lines
1.5 KiB
Rust
//@ run-pass
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#![allow(unused_must_use)]
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//@ needs-threads
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use std::thread;
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use std::sync::mpsc::{channel, Sender};
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pub fn main() { println!("===== WITHOUT THREADS ====="); test00(); }
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fn test00_start(ch: &Sender<isize>, message: isize, count: isize) {
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println!("Starting test00_start");
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let mut i: isize = 0;
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while i < count {
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println!("Sending Message");
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ch.send(message + 0).unwrap();
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i = i + 1;
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}
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println!("Ending test00_start");
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}
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fn test00() {
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let number_of_tasks: isize = 16;
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let number_of_messages: isize = 4;
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println!("Creating tasks");
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let (tx, rx) = channel();
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let mut i: isize = 0;
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// Create and spawn threads...
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let mut results = Vec::new();
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while i < number_of_tasks {
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let tx = tx.clone();
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results.push(thread::spawn({
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let i = i;
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move|| {
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test00_start(&tx, i, number_of_messages)
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}
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}));
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i = i + 1;
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}
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// Read from spawned threads...
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let mut sum = 0;
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for _r in &results {
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i = 0;
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while i < number_of_messages {
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let value = rx.recv().unwrap();
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sum += value;
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i = i + 1;
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}
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}
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// Join spawned threads...
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for r in results { r.join(); }
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println!("Completed: Final number is: ");
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println!("{}", sum);
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// assert (sum == (((number_of_threads * (number_of_threads - 1)) / 2) *
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// number_of_messages));
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assert_eq!(sum, 480);
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}
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