| /// Test that one can emulate join with `scope`: |
| fn pseudo_join<F, G>(f: F, g: G) |
| where |
| F: FnOnce() + Send, |
| G: FnOnce() + Send, |
| { |
| rayon_core::scope(|s| { |
| s.spawn(|_| g()); |
| f(); |
| }); |
| } |
| |
| fn quick_sort<T: PartialOrd + Send>(v: &mut [T]) { |
| if v.len() <= 1 { |
| return; |
| } |
| |
| let mid = partition(v); |
| let (lo, hi) = v.split_at_mut(mid); |
| pseudo_join(|| quick_sort(lo), || quick_sort(hi)); |
| } |
| |
| fn partition<T: PartialOrd + Send>(v: &mut [T]) -> usize { |
| let pivot = v.len() - 1; |
| let mut i = 0; |
| for j in 0..pivot { |
| if v[j] <= v[pivot] { |
| v.swap(i, j); |
| i += 1; |
| } |
| } |
| v.swap(i, pivot); |
| i |
| } |
| |
| fn is_sorted<T: Send + Ord>(v: &[T]) -> bool { |
| (1..v.len()).all(|i| v[i - 1] <= v[i]) |
| } |
| |
| #[test] |
| fn scope_join() { |
| let mut v: Vec<i32> = (0..256).rev().collect(); |
| quick_sort(&mut v); |
| assert!(is_sorted(&v)); |
| } |