Vendor things

third-party/vendor/loom/tests/atomic_int.rs

@@ -0,0 +1,113 @@
+#![deny(warnings, rust_2018_idioms)]
+
+macro_rules! test_int {
+    ($name:ident, $int:ty, $atomic:ty) => {
+        mod $name {
+            use loom::sync::atomic::*;
+            use std::sync::atomic::Ordering::SeqCst;
+
+            const NUM_A: u64 = 11641914933775430211;
+            const NUM_B: u64 = 13209405719799650717;
+
+            #[test]
+            fn xor() {
+                loom::model(|| {
+                    let a: $int = NUM_A as $int;
+                    let b: $int = NUM_B as $int;
+
+                    let atomic = <$atomic>::new(a);
+                    let prev = atomic.fetch_xor(b, SeqCst);
+
+                    assert_eq!(a, prev, "prev did not match");
+                    assert_eq!(a ^ b, atomic.load(SeqCst), "load failed");
+                });
+            }
+
+            #[test]
+            fn max() {
+                loom::model(|| {
+                    let a: $int = NUM_A as $int;
+                    let b: $int = NUM_B as $int;
+
+                    let atomic = <$atomic>::new(a);
+                    let prev = atomic.fetch_max(b, SeqCst);
+
+                    assert_eq!(a, prev, "prev did not match");
+                    assert_eq!(a.max(b), atomic.load(SeqCst), "load failed");
+                });
+            }
+
+            #[test]
+            fn min() {
+                loom::model(|| {
+                    let a: $int = NUM_A as $int;
+                    let b: $int = NUM_B as $int;
+
+                    let atomic = <$atomic>::new(a);
+                    let prev = atomic.fetch_min(b, SeqCst);
+
+                    assert_eq!(a, prev, "prev did not match");
+                    assert_eq!(a.min(b), atomic.load(SeqCst), "load failed");
+                });
+            }
+
+            #[test]
+            fn compare_exchange() {
+                loom::model(|| {
+                    let a: $int = NUM_A as $int;
+                    let b: $int = NUM_B as $int;
+
+                    let atomic = <$atomic>::new(a);
+                    assert_eq!(Err(a), atomic.compare_exchange(b, a, SeqCst, SeqCst));
+                    assert_eq!(Ok(a), atomic.compare_exchange(a, b, SeqCst, SeqCst));
+
+                    assert_eq!(b, atomic.load(SeqCst));
+                });
+            }
+
+            #[test]
+            #[ignore]
+            fn compare_exchange_weak() {
+                loom::model(|| {
+                    let a: $int = NUM_A as $int;
+                    let b: $int = NUM_B as $int;
+
+                    let atomic = <$atomic>::new(a);
+                    assert_eq!(Err(a), atomic.compare_exchange_weak(b, a, SeqCst, SeqCst));
+                    assert_eq!(Ok(a), atomic.compare_exchange_weak(a, b, SeqCst, SeqCst));
+
+                    assert_eq!(b, atomic.load(SeqCst));
+                });
+            }
+
+            #[test]
+            fn fetch_update() {
+                loom::model(|| {
+                    let a: $int = NUM_A as $int;
+                    let b: $int = NUM_B as $int;
+
+                    let atomic = <$atomic>::new(a);
+                    assert_eq!(Ok(a), atomic.fetch_update(SeqCst, SeqCst, |_| Some(b)));
+                    assert_eq!(Err(b), atomic.fetch_update(SeqCst, SeqCst, |_| None));
+                    assert_eq!(b, atomic.load(SeqCst));
+                });
+            }
+        }
+    };
+}
+
+test_int!(atomic_u8, u8, AtomicU8);
+test_int!(atomic_u16, u16, AtomicU16);
+test_int!(atomic_u32, u32, AtomicU32);
+test_int!(atomic_usize, usize, AtomicUsize);
+
+test_int!(atomic_i8, i8, AtomicI8);
+test_int!(atomic_i16, i16, AtomicI16);
+test_int!(atomic_i32, i32, AtomicI32);
+test_int!(atomic_isize, isize, AtomicIsize);
+
+#[cfg(target_pointer_width = "64")]
+test_int!(atomic_u64, u64, AtomicU64);
+
+#[cfg(target_pointer_width = "64")]
+test_int!(atomic_i64, i64, AtomicI64);