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