4 use crate::panic::panic_any;
7 mpsc::{channel, Sender},
10 use crate::thread::{self, ThreadId};
11 use crate::time::Duration;
12 use crate::time::Instant;
14 // !!! These tests are dangerous. If something is buggy, they will hang, !!!
15 // !!! instead of exiting cleanly. This might wedge the buildbots. !!!
18 fn test_unnamed_thread() {
19 thread::spawn(move || {
20 assert!(thread::current().name().is_none());
24 .expect("thread panicked");
28 fn test_named_thread() {
30 .name("ada lovelace".to_string())
32 assert!(thread::current().name().unwrap() == "ada lovelace".to_string());
41 fn test_invalid_named_thread() {
42 let _ = Builder::new().name("ada l\0velace".to_string()).spawn(|| {});
47 let (tx, rx) = channel();
48 thread::spawn(move || {
55 fn test_is_finished() {
56 let b = Arc::new(Barrier::new(2));
57 let t = thread::spawn({
65 // Thread is definitely running here, since it's still waiting for the barrier.
66 assert_eq!(t.is_finished(), false);
68 // Unblock the barrier.
71 // Now check that t.is_finished() becomes true within a reasonable time.
72 let start = Instant::now();
73 while !t.is_finished() {
74 assert!(start.elapsed() < Duration::from_secs(2));
75 thread::sleep(Duration::from_millis(15));
78 // Joining the thread should not block for a significant time now.
79 let join_time = Instant::now();
80 assert_eq!(t.join().unwrap(), 1234);
81 assert!(join_time.elapsed() < Duration::from_secs(2));
85 fn test_join_panic() {
86 match thread::spawn(move || panic!()).join() {
87 result::Result::Err(_) => (),
88 result::Result::Ok(()) => panic!(),
93 fn test_spawn_sched() {
94 let (tx, rx) = channel();
96 fn f(i: i32, tx: Sender<()>) {
98 thread::spawn(move || {
100 tx.send(()).unwrap();
111 fn test_spawn_sched_childs_on_default_sched() {
112 let (tx, rx) = channel();
114 thread::spawn(move || {
115 thread::spawn(move || {
116 tx.send(()).unwrap();
123 fn avoid_copying_the_body<F>(spawnfn: F)
125 F: FnOnce(Box<dyn Fn() + Send>),
127 let (tx, rx) = channel();
129 let x: Box<_> = box 1;
130 let x_in_parent = (&*x) as *const i32 as usize;
132 spawnfn(Box::new(move || {
133 let x_in_child = (&*x) as *const i32 as usize;
134 tx.send(x_in_child).unwrap();
137 let x_in_child = rx.recv().unwrap();
138 assert_eq!(x_in_parent, x_in_child);
142 fn test_avoid_copying_the_body_spawn() {
143 avoid_copying_the_body(|v| {
144 thread::spawn(move || v());
149 fn test_avoid_copying_the_body_thread_spawn() {
150 avoid_copying_the_body(|f| {
151 thread::spawn(move || {
158 fn test_avoid_copying_the_body_join() {
159 avoid_copying_the_body(|f| {
160 let _ = thread::spawn(move || f()).join();
165 fn test_child_doesnt_ref_parent() {
166 // If the child refcounts the parent thread, this will stack overflow when
167 // climbing the thread tree to dereference each ancestor. (See #1789)
168 // (well, it would if the constant were 8000+ - I lowered it to be more
169 // valgrind-friendly. try this at home, instead..!)
170 const GENERATIONS: u32 = 16;
171 fn child_no(x: u32) -> Box<dyn Fn() + Send> {
172 return Box::new(move || {
174 thread::spawn(move || child_no(x + 1)());
178 thread::spawn(|| child_no(0)());
182 fn test_simple_newsched_spawn() {
183 thread::spawn(move || {});
187 fn test_try_panic_message_string_literal() {
188 match thread::spawn(move || {
189 panic!("static string");
194 type T = &'static str;
195 assert!(e.is::<T>());
196 assert_eq!(*e.downcast::<T>().unwrap(), "static string");
203 fn test_try_panic_any_message_owned_str() {
204 match thread::spawn(move || {
205 panic_any("owned string".to_string());
211 assert!(e.is::<T>());
212 assert_eq!(*e.downcast::<T>().unwrap(), "owned string".to_string());
219 fn test_try_panic_any_message_any() {
220 match thread::spawn(move || {
221 panic_any(box 413u16 as Box<dyn Any + Send>);
226 type T = Box<dyn Any + Send>;
227 assert!(e.is::<T>());
228 let any = e.downcast::<T>().unwrap();
229 assert!(any.is::<u16>());
230 assert_eq!(*any.downcast::<u16>().unwrap(), 413);
237 fn test_try_panic_any_message_unit_struct() {
240 match thread::spawn(move || panic_any(Juju)).join() {
241 Err(ref e) if e.is::<Juju>() => {}
242 Err(_) | Ok(()) => panic!(),
247 fn test_park_timeout_unpark_before() {
249 thread::current().unpark();
250 thread::park_timeout(Duration::from_millis(u32::MAX as u64));
255 fn test_park_timeout_unpark_not_called() {
257 thread::park_timeout(Duration::from_millis(10));
262 fn test_park_timeout_unpark_called_other_thread() {
264 let th = thread::current();
266 let _guard = thread::spawn(move || {
267 super::sleep(Duration::from_millis(50));
271 thread::park_timeout(Duration::from_millis(u32::MAX as u64));
276 fn sleep_ms_smoke() {
277 thread::sleep(Duration::from_millis(2));
281 fn test_size_of_option_thread_id() {
282 assert_eq!(mem::size_of::<Option<ThreadId>>(), mem::size_of::<ThreadId>());
286 fn test_thread_id_equal() {
287 assert!(thread::current().id() == thread::current().id());
291 fn test_thread_id_not_equal() {
292 let spawned_id = thread::spawn(|| thread::current().id()).join().unwrap();
293 assert!(thread::current().id() != spawned_id);
296 // NOTE: the corresponding test for stderr is in ui/thread-stderr, due
297 // to the test harness apparently interfering with stderr configuration.