1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![feature(core, std_misc)]
12 use std::thread::Thread;
15 fn par_for<I, F>(iter: I, f: F)
17 <I as Iterator>::Item: Send,
18 F: Fn(<I as Iterator>::Item) + Sync
21 let _guards: Vec<_> = iter.map(|elem| {
22 Thread::scoped(move || {
30 let sum_lengths = Mutex::new(0);
31 par_for(x.windows(4), |x| {
32 *sum_lengths.lock().unwrap() += x.len()
35 assert_eq!(*sum_lengths.lock().unwrap(), (x.len() - 3) * 4);
39 let mut elements = [0; 20];
41 // iterators over references into this stack frame
42 par_for(elements.iter_mut().enumerate(), |(i, x)| {