| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License.. |
| |
| #![allow(clippy::vec_init_then_push)] |
| |
| use crate::{ |
| lazy::{Lazy, SyncLazy, SyncOnceCell}, |
| panic, |
| sync::{ |
| atomic::{AtomicUsize, Ordering::SeqCst}, |
| mpsc::channel, |
| Mutex, |
| }, |
| thread, |
| }; |
| |
| use sgx_test_utils::test_case; |
| |
| #[test_case] |
| fn lazy_default() { |
| static CALLED: AtomicUsize = AtomicUsize::new(0); |
| |
| struct Foo(u8); |
| impl Default for Foo { |
| fn default() -> Self { |
| CALLED.fetch_add(1, SeqCst); |
| Foo(42) |
| } |
| } |
| |
| let lazy: Lazy<Mutex<Foo>> = <_>::default(); |
| |
| assert_eq!(CALLED.load(SeqCst), 0); |
| |
| assert_eq!(lazy.lock().unwrap().0, 42); |
| assert_eq!(CALLED.load(SeqCst), 1); |
| |
| lazy.lock().unwrap().0 = 21; |
| |
| assert_eq!(lazy.lock().unwrap().0, 21); |
| assert_eq!(CALLED.load(SeqCst), 1); |
| } |
| |
| #[test_case] |
| fn lazy_poisoning() { |
| let x: Lazy<String> = Lazy::new(|| panic!("kaboom")); |
| for _ in 0..2 { |
| let res = panic::catch_unwind(panic::AssertUnwindSafe(|| x.len())); |
| assert!(res.is_err()); |
| } |
| } |
| |
| fn spawn_and_wait<R: Send + 'static>(f: impl FnOnce() -> R + Send + 'static) -> R { |
| thread::spawn(f).join().unwrap() |
| } |
| |
| #[test_case] |
| fn sync_once_cell() { |
| static ONCE_CELL: SyncOnceCell<i32> = SyncOnceCell::new(); |
| |
| assert!(ONCE_CELL.get().is_none()); |
| |
| spawn_and_wait(|| { |
| ONCE_CELL.get_or_init(|| 92); |
| assert_eq!(ONCE_CELL.get(), Some(&92)); |
| }); |
| |
| ONCE_CELL.get_or_init(|| panic!("Kabom!")); |
| assert_eq!(ONCE_CELL.get(), Some(&92)); |
| } |
| |
| #[test_case] |
| fn sync_once_cell_get_mut() { |
| let mut c = SyncOnceCell::new(); |
| assert!(c.get_mut().is_none()); |
| c.set(90).unwrap(); |
| *c.get_mut().unwrap() += 2; |
| assert_eq!(c.get_mut(), Some(&mut 92)); |
| } |
| |
| #[test_case] |
| fn sync_once_cell_get_unchecked() { |
| let c = SyncOnceCell::new(); |
| c.set(92).unwrap(); |
| unsafe { |
| assert_eq!(c.get_unchecked(), &92); |
| } |
| } |
| |
| #[test_case] |
| fn sync_once_cell_drop() { |
| static DROP_CNT: AtomicUsize = AtomicUsize::new(0); |
| struct Dropper; |
| impl Drop for Dropper { |
| fn drop(&mut self) { |
| DROP_CNT.fetch_add(1, SeqCst); |
| } |
| } |
| |
| let x = SyncOnceCell::new(); |
| spawn_and_wait(move || { |
| x.get_or_init(|| Dropper); |
| assert_eq!(DROP_CNT.load(SeqCst), 0); |
| drop(x); |
| }); |
| |
| assert_eq!(DROP_CNT.load(SeqCst), 1); |
| } |
| |
| #[test_case] |
| fn sync_once_cell_drop_empty() { |
| let x = SyncOnceCell::<String>::new(); |
| drop(x); |
| } |
| |
| #[allow(clippy::redundant_clone)] |
| #[test_case] |
| fn clone() { |
| let s = SyncOnceCell::new(); |
| let c = s.clone(); |
| assert!(c.get().is_none()); |
| |
| s.set("hello".to_string()).unwrap(); |
| let c = s.clone(); |
| assert_eq!(c.get().map(String::as_str), Some("hello")); |
| } |
| |
| #[test_case] |
| fn get_or_try_init() { |
| let cell: SyncOnceCell<String> = SyncOnceCell::new(); |
| assert!(cell.get().is_none()); |
| |
| let res = panic::catch_unwind(|| cell.get_or_try_init(|| -> Result<_, ()> { panic!() })); |
| assert!(res.is_err()); |
| assert!(!cell.is_initialized()); |
| assert!(cell.get().is_none()); |
| |
| assert_eq!(cell.get_or_try_init(|| Err(())), Err(())); |
| |
| assert_eq!(cell.get_or_try_init(|| Ok::<_, ()>("hello".to_string())), Ok(&"hello".to_string())); |
| assert_eq!(cell.get(), Some(&"hello".to_string())); |
| } |
| |
| #[test_case] |
| fn from_impl() { |
| assert_eq!(SyncOnceCell::from("value").get(), Some(&"value")); |
| assert_ne!(SyncOnceCell::from("foo").get(), Some(&"bar")); |
| } |
| |
| #[test_case] |
| fn partialeq_impl() { |
| assert!(SyncOnceCell::from("value") == SyncOnceCell::from("value")); |
| assert!(SyncOnceCell::from("foo") != SyncOnceCell::from("bar")); |
| |
| assert!(SyncOnceCell::<String>::new() == SyncOnceCell::new()); |
| assert!(SyncOnceCell::<String>::new() != SyncOnceCell::from("value".to_owned())); |
| } |
| |
| #[test_case] |
| fn into_inner() { |
| let cell: SyncOnceCell<String> = SyncOnceCell::new(); |
| assert_eq!(cell.into_inner(), None); |
| let cell = SyncOnceCell::new(); |
| cell.set("hello".to_string()).unwrap(); |
| assert_eq!(cell.into_inner(), Some("hello".to_string())); |
| } |
| |
| #[test_case] |
| fn sync_lazy_new() { |
| static CALLED: AtomicUsize = AtomicUsize::new(0); |
| static SYNC_LAZY: SyncLazy<i32> = SyncLazy::new(|| { |
| CALLED.fetch_add(1, SeqCst); |
| 92 |
| }); |
| |
| assert_eq!(CALLED.load(SeqCst), 0); |
| |
| spawn_and_wait(|| { |
| let y = *SYNC_LAZY - 30; |
| assert_eq!(y, 62); |
| assert_eq!(CALLED.load(SeqCst), 1); |
| }); |
| |
| let y = *SYNC_LAZY - 30; |
| assert_eq!(y, 62); |
| assert_eq!(CALLED.load(SeqCst), 1); |
| } |
| |
| #[test_case] |
| fn sync_lazy_default() { |
| static CALLED: AtomicUsize = AtomicUsize::new(0); |
| |
| struct Foo(u8); |
| impl Default for Foo { |
| fn default() -> Self { |
| CALLED.fetch_add(1, SeqCst); |
| Foo(42) |
| } |
| } |
| |
| let lazy: SyncLazy<Mutex<Foo>> = <_>::default(); |
| |
| assert_eq!(CALLED.load(SeqCst), 0); |
| |
| assert_eq!(lazy.lock().unwrap().0, 42); |
| assert_eq!(CALLED.load(SeqCst), 1); |
| |
| lazy.lock().unwrap().0 = 21; |
| |
| assert_eq!(lazy.lock().unwrap().0, 21); |
| assert_eq!(CALLED.load(SeqCst), 1); |
| } |
| |
| #[test_case] |
| fn static_sync_lazy() { |
| static XS: SyncLazy<Vec<i32>> = SyncLazy::new(|| { |
| let mut xs = Vec::new(); |
| xs.push(1); |
| xs.push(2); |
| xs.push(3); |
| xs |
| }); |
| |
| spawn_and_wait(|| { |
| assert_eq!(&*XS, &vec![1, 2, 3]); |
| }); |
| |
| assert_eq!(&*XS, &vec![1, 2, 3]); |
| } |
| |
| #[test_case] |
| fn static_sync_lazy_via_fn() { |
| fn xs() -> &'static Vec<i32> { |
| static XS: SyncOnceCell<Vec<i32>> = SyncOnceCell::new(); |
| XS.get_or_init(|| { |
| let mut xs = Vec::new(); |
| xs.push(1); |
| xs.push(2); |
| xs.push(3); |
| xs |
| }) |
| } |
| assert_eq!(xs(), &vec![1, 2, 3]); |
| } |
| |
| #[test_case] |
| fn sync_lazy_poisoning() { |
| let x: SyncLazy<String> = SyncLazy::new(|| panic!("kaboom")); |
| for _ in 0..2 { |
| let res = panic::catch_unwind(|| x.len()); |
| assert!(res.is_err()); |
| } |
| } |
| |
| #[test_case] |
| fn is_sync_send() { |
| fn assert_traits<T: Send + Sync>() {} |
| assert_traits::<SyncOnceCell<String>>(); |
| assert_traits::<SyncLazy<String>>(); |
| } |
| |
| #[test_case] |
| fn eval_once_macro() { |
| macro_rules! eval_once { |
| (|| -> $ty:ty { |
| $($body:tt)* |
| }) => {{ |
| static ONCE_CELL: SyncOnceCell<$ty> = SyncOnceCell::new(); |
| fn init() -> $ty { |
| $($body)* |
| } |
| ONCE_CELL.get_or_init(init) |
| }}; |
| } |
| |
| let fib: &'static Vec<i32> = eval_once! { |
| || -> Vec<i32> { |
| let mut res = vec![1, 1]; |
| for i in 0..10 { |
| let next = res[i] + res[i + 1]; |
| res.push(next); |
| } |
| res |
| } |
| }; |
| assert_eq!(fib[5], 8) |
| } |
| |
| #[test_case] |
| fn sync_once_cell_does_not_leak_partially_constructed_boxes() { |
| static ONCE_CELL: SyncOnceCell<String> = SyncOnceCell::new(); |
| |
| let n_readers = 10; |
| let n_writers = 3; |
| const MSG: &str = "Hello, World"; |
| |
| let (tx, rx) = channel(); |
| |
| for _ in 0..n_readers { |
| let tx = tx.clone(); |
| thread::spawn(move || { |
| loop { |
| if let Some(msg) = ONCE_CELL.get() { |
| tx.send(msg).unwrap(); |
| break; |
| } |
| #[cfg(target_env = "sgx")] |
| crate::thread::yield_now(); |
| } |
| }); |
| } |
| for _ in 0..n_writers { |
| thread::spawn(move || { |
| let _ = ONCE_CELL.set(MSG.to_owned()); |
| }); |
| } |
| |
| for _ in 0..n_readers { |
| let msg = rx.recv().unwrap(); |
| assert_eq!(msg, MSG); |
| } |
| } |
| |
| #[test_case] |
| fn dropck() { |
| let cell = SyncOnceCell::new(); |
| { |
| let s = String::new(); |
| cell.set(&s).unwrap(); |
| } |
| } |