Merge commit 'ddf105b646' into sync-from-ra

crates/salsa/tests/parallel/independent.rs

@@ -0,0 +1,29 @@
+use crate::setup::{ParDatabase, ParDatabaseImpl};
+use salsa::ParallelDatabase;
+
+/// Test two `sum` queries (on distinct keys) executing in different
+/// threads. Really just a test that `snapshot` etc compiles.
+#[test]
+fn in_par_two_independent_queries() {
+    let mut db = ParDatabaseImpl::default();
+
+    db.set_input('a', 100);
+    db.set_input('b', 10);
+    db.set_input('c', 1);
+    db.set_input('d', 200);
+    db.set_input('e', 20);
+    db.set_input('f', 2);
+
+    let thread1 = std::thread::spawn({
+        let db = db.snapshot();
+        move || db.sum("abc")
+    });
+
+    let thread2 = std::thread::spawn({
+        let db = db.snapshot();
+        move || db.sum("def")
+    });
+
+    assert_eq!(thread1.join().unwrap(), 111);
+    assert_eq!(thread2.join().unwrap(), 222);
+}