From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001
From: Valentin Popov <valentin@popov.link>
Date: Mon, 8 Jan 2024 01:21:28 +0400
Subject: Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>
---
 vendor/rayon-core/tests/scope_join.rs | 45 +++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 vendor/rayon-core/tests/scope_join.rs

(limited to 'vendor/rayon-core/tests/scope_join.rs')

diff --git a/vendor/rayon-core/tests/scope_join.rs b/vendor/rayon-core/tests/scope_join.rs
new file mode 100644
index 0000000..9d88133
--- /dev/null
+++ b/vendor/rayon-core/tests/scope_join.rs
@@ -0,0 +1,45 @@
+/// 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));
+}
-- 
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