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Commit | Line | Data |
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416331ca XL |
1 | use super::*; |
2 | ||
3 | use std::boxed::Box; | |
4 | use std::clone::Clone; | |
dfeec247 | 5 | use std::convert::{From, TryInto}; |
416331ca XL |
6 | use std::mem::drop; |
7 | use std::ops::Drop; | |
8 | use std::option::Option::{self, None, Some}; | |
dfeec247 XL |
9 | use std::sync::atomic::{ |
10 | self, | |
11 | Ordering::{Acquire, SeqCst}, | |
12 | }; | |
13 | use std::sync::mpsc::channel; | |
416331ca | 14 | use std::sync::Mutex; |
dfeec247 | 15 | use std::thread; |
416331ca XL |
16 | |
17 | use crate::vec::Vec; | |
18 | ||
19 | struct Canary(*mut atomic::AtomicUsize); | |
20 | ||
21 | impl Drop for Canary { | |
22 | fn drop(&mut self) { | |
23 | unsafe { | |
24 | match *self { | |
25 | Canary(c) => { | |
26 | (*c).fetch_add(1, SeqCst); | |
27 | } | |
28 | } | |
29 | } | |
30 | } | |
31 | } | |
32 | ||
33 | #[test] | |
34 | #[cfg_attr(target_os = "emscripten", ignore)] | |
416331ca XL |
35 | fn manually_share_arc() { |
36 | let v = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; | |
37 | let arc_v = Arc::new(v); | |
38 | ||
39 | let (tx, rx) = channel(); | |
40 | ||
41 | let _t = thread::spawn(move || { | |
42 | let arc_v: Arc<Vec<i32>> = rx.recv().unwrap(); | |
43 | assert_eq!((*arc_v)[3], 4); | |
44 | }); | |
45 | ||
46 | tx.send(arc_v.clone()).unwrap(); | |
47 | ||
48 | assert_eq!((*arc_v)[2], 3); | |
49 | assert_eq!((*arc_v)[4], 5); | |
50 | } | |
51 | ||
52 | #[test] | |
53 | fn test_arc_get_mut() { | |
54 | let mut x = Arc::new(3); | |
55 | *Arc::get_mut(&mut x).unwrap() = 4; | |
56 | assert_eq!(*x, 4); | |
57 | let y = x.clone(); | |
58 | assert!(Arc::get_mut(&mut x).is_none()); | |
59 | drop(y); | |
60 | assert!(Arc::get_mut(&mut x).is_some()); | |
61 | let _w = Arc::downgrade(&x); | |
62 | assert!(Arc::get_mut(&mut x).is_none()); | |
63 | } | |
64 | ||
65 | #[test] | |
66 | fn weak_counts() { | |
60c5eb7d | 67 | assert_eq!(Weak::weak_count(&Weak::<u64>::new()), 0); |
416331ca XL |
68 | assert_eq!(Weak::strong_count(&Weak::<u64>::new()), 0); |
69 | ||
70 | let a = Arc::new(0); | |
71 | let w = Arc::downgrade(&a); | |
72 | assert_eq!(Weak::strong_count(&w), 1); | |
60c5eb7d | 73 | assert_eq!(Weak::weak_count(&w), 1); |
416331ca XL |
74 | let w2 = w.clone(); |
75 | assert_eq!(Weak::strong_count(&w), 1); | |
60c5eb7d | 76 | assert_eq!(Weak::weak_count(&w), 2); |
416331ca | 77 | assert_eq!(Weak::strong_count(&w2), 1); |
60c5eb7d | 78 | assert_eq!(Weak::weak_count(&w2), 2); |
416331ca XL |
79 | drop(w); |
80 | assert_eq!(Weak::strong_count(&w2), 1); | |
60c5eb7d | 81 | assert_eq!(Weak::weak_count(&w2), 1); |
416331ca XL |
82 | let a2 = a.clone(); |
83 | assert_eq!(Weak::strong_count(&w2), 2); | |
60c5eb7d | 84 | assert_eq!(Weak::weak_count(&w2), 1); |
416331ca XL |
85 | drop(a2); |
86 | drop(a); | |
87 | assert_eq!(Weak::strong_count(&w2), 0); | |
60c5eb7d | 88 | assert_eq!(Weak::weak_count(&w2), 0); |
416331ca XL |
89 | drop(w2); |
90 | } | |
91 | ||
92 | #[test] | |
93 | fn try_unwrap() { | |
94 | let x = Arc::new(3); | |
95 | assert_eq!(Arc::try_unwrap(x), Ok(3)); | |
96 | let x = Arc::new(4); | |
97 | let _y = x.clone(); | |
98 | assert_eq!(Arc::try_unwrap(x), Err(Arc::new(4))); | |
99 | let x = Arc::new(5); | |
100 | let _w = Arc::downgrade(&x); | |
101 | assert_eq!(Arc::try_unwrap(x), Ok(5)); | |
102 | } | |
103 | ||
104 | #[test] | |
105 | fn into_from_raw() { | |
106 | let x = Arc::new(box "hello"); | |
107 | let y = x.clone(); | |
108 | ||
109 | let x_ptr = Arc::into_raw(x); | |
110 | drop(y); | |
111 | unsafe { | |
112 | assert_eq!(**x_ptr, "hello"); | |
113 | ||
114 | let x = Arc::from_raw(x_ptr); | |
115 | assert_eq!(**x, "hello"); | |
116 | ||
117 | assert_eq!(Arc::try_unwrap(x).map(|x| *x), Ok("hello")); | |
118 | } | |
119 | } | |
120 | ||
121 | #[test] | |
122 | fn test_into_from_raw_unsized() { | |
123 | use std::fmt::Display; | |
124 | use std::string::ToString; | |
125 | ||
126 | let arc: Arc<str> = Arc::from("foo"); | |
127 | ||
128 | let ptr = Arc::into_raw(arc.clone()); | |
129 | let arc2 = unsafe { Arc::from_raw(ptr) }; | |
130 | ||
131 | assert_eq!(unsafe { &*ptr }, "foo"); | |
132 | assert_eq!(arc, arc2); | |
133 | ||
134 | let arc: Arc<dyn Display> = Arc::new(123); | |
135 | ||
136 | let ptr = Arc::into_raw(arc.clone()); | |
137 | let arc2 = unsafe { Arc::from_raw(ptr) }; | |
138 | ||
139 | assert_eq!(unsafe { &*ptr }.to_string(), "123"); | |
140 | assert_eq!(arc2.to_string(), "123"); | |
141 | } | |
142 | ||
143 | #[test] | |
144 | fn test_cowarc_clone_make_mut() { | |
145 | let mut cow0 = Arc::new(75); | |
146 | let mut cow1 = cow0.clone(); | |
147 | let mut cow2 = cow1.clone(); | |
148 | ||
149 | assert!(75 == *Arc::make_mut(&mut cow0)); | |
150 | assert!(75 == *Arc::make_mut(&mut cow1)); | |
151 | assert!(75 == *Arc::make_mut(&mut cow2)); | |
152 | ||
153 | *Arc::make_mut(&mut cow0) += 1; | |
154 | *Arc::make_mut(&mut cow1) += 2; | |
155 | *Arc::make_mut(&mut cow2) += 3; | |
156 | ||
157 | assert!(76 == *cow0); | |
158 | assert!(77 == *cow1); | |
159 | assert!(78 == *cow2); | |
160 | ||
161 | // none should point to the same backing memory | |
162 | assert!(*cow0 != *cow1); | |
163 | assert!(*cow0 != *cow2); | |
164 | assert!(*cow1 != *cow2); | |
165 | } | |
166 | ||
167 | #[test] | |
168 | fn test_cowarc_clone_unique2() { | |
169 | let mut cow0 = Arc::new(75); | |
170 | let cow1 = cow0.clone(); | |
171 | let cow2 = cow1.clone(); | |
172 | ||
173 | assert!(75 == *cow0); | |
174 | assert!(75 == *cow1); | |
175 | assert!(75 == *cow2); | |
176 | ||
177 | *Arc::make_mut(&mut cow0) += 1; | |
178 | assert!(76 == *cow0); | |
179 | assert!(75 == *cow1); | |
180 | assert!(75 == *cow2); | |
181 | ||
182 | // cow1 and cow2 should share the same contents | |
183 | // cow0 should have a unique reference | |
184 | assert!(*cow0 != *cow1); | |
185 | assert!(*cow0 != *cow2); | |
186 | assert!(*cow1 == *cow2); | |
187 | } | |
188 | ||
189 | #[test] | |
190 | fn test_cowarc_clone_weak() { | |
191 | let mut cow0 = Arc::new(75); | |
192 | let cow1_weak = Arc::downgrade(&cow0); | |
193 | ||
194 | assert!(75 == *cow0); | |
195 | assert!(75 == *cow1_weak.upgrade().unwrap()); | |
196 | ||
197 | *Arc::make_mut(&mut cow0) += 1; | |
198 | ||
199 | assert!(76 == *cow0); | |
200 | assert!(cow1_weak.upgrade().is_none()); | |
201 | } | |
202 | ||
203 | #[test] | |
204 | fn test_live() { | |
205 | let x = Arc::new(5); | |
206 | let y = Arc::downgrade(&x); | |
207 | assert!(y.upgrade().is_some()); | |
208 | } | |
209 | ||
210 | #[test] | |
211 | fn test_dead() { | |
212 | let x = Arc::new(5); | |
213 | let y = Arc::downgrade(&x); | |
214 | drop(x); | |
215 | assert!(y.upgrade().is_none()); | |
216 | } | |
217 | ||
218 | #[test] | |
219 | fn weak_self_cyclic() { | |
220 | struct Cycle { | |
221 | x: Mutex<Option<Weak<Cycle>>>, | |
222 | } | |
223 | ||
224 | let a = Arc::new(Cycle { x: Mutex::new(None) }); | |
225 | let b = Arc::downgrade(&a.clone()); | |
226 | *a.x.lock().unwrap() = Some(b); | |
227 | ||
228 | // hopefully we don't double-free (or leak)... | |
229 | } | |
230 | ||
231 | #[test] | |
232 | fn drop_arc() { | |
233 | let mut canary = atomic::AtomicUsize::new(0); | |
234 | let x = Arc::new(Canary(&mut canary as *mut atomic::AtomicUsize)); | |
235 | drop(x); | |
236 | assert!(canary.load(Acquire) == 1); | |
237 | } | |
238 | ||
239 | #[test] | |
240 | fn drop_arc_weak() { | |
241 | let mut canary = atomic::AtomicUsize::new(0); | |
242 | let arc = Arc::new(Canary(&mut canary as *mut atomic::AtomicUsize)); | |
243 | let arc_weak = Arc::downgrade(&arc); | |
244 | assert!(canary.load(Acquire) == 0); | |
245 | drop(arc); | |
246 | assert!(canary.load(Acquire) == 1); | |
247 | drop(arc_weak); | |
248 | } | |
249 | ||
250 | #[test] | |
251 | fn test_strong_count() { | |
252 | let a = Arc::new(0); | |
253 | assert!(Arc::strong_count(&a) == 1); | |
254 | let w = Arc::downgrade(&a); | |
255 | assert!(Arc::strong_count(&a) == 1); | |
256 | let b = w.upgrade().expect(""); | |
257 | assert!(Arc::strong_count(&b) == 2); | |
258 | assert!(Arc::strong_count(&a) == 2); | |
259 | drop(w); | |
260 | drop(a); | |
261 | assert!(Arc::strong_count(&b) == 1); | |
262 | let c = b.clone(); | |
263 | assert!(Arc::strong_count(&b) == 2); | |
264 | assert!(Arc::strong_count(&c) == 2); | |
265 | } | |
266 | ||
267 | #[test] | |
268 | fn test_weak_count() { | |
269 | let a = Arc::new(0); | |
270 | assert!(Arc::strong_count(&a) == 1); | |
271 | assert!(Arc::weak_count(&a) == 0); | |
272 | let w = Arc::downgrade(&a); | |
273 | assert!(Arc::strong_count(&a) == 1); | |
274 | assert!(Arc::weak_count(&a) == 1); | |
275 | let x = w.clone(); | |
276 | assert!(Arc::weak_count(&a) == 2); | |
277 | drop(w); | |
278 | drop(x); | |
279 | assert!(Arc::strong_count(&a) == 1); | |
280 | assert!(Arc::weak_count(&a) == 0); | |
281 | let c = a.clone(); | |
282 | assert!(Arc::strong_count(&a) == 2); | |
283 | assert!(Arc::weak_count(&a) == 0); | |
284 | let d = Arc::downgrade(&c); | |
285 | assert!(Arc::weak_count(&c) == 1); | |
286 | assert!(Arc::strong_count(&c) == 2); | |
287 | ||
288 | drop(a); | |
289 | drop(c); | |
290 | drop(d); | |
291 | } | |
292 | ||
293 | #[test] | |
294 | fn show_arc() { | |
295 | let a = Arc::new(5); | |
296 | assert_eq!(format!("{:?}", a), "5"); | |
297 | } | |
298 | ||
299 | // Make sure deriving works with Arc<T> | |
300 | #[derive(Eq, Ord, PartialEq, PartialOrd, Clone, Debug, Default)] | |
301 | struct Foo { | |
302 | inner: Arc<i32>, | |
303 | } | |
304 | ||
305 | #[test] | |
306 | fn test_unsized() { | |
307 | let x: Arc<[i32]> = Arc::new([1, 2, 3]); | |
308 | assert_eq!(format!("{:?}", x), "[1, 2, 3]"); | |
309 | let y = Arc::downgrade(&x.clone()); | |
310 | drop(x); | |
311 | assert!(y.upgrade().is_none()); | |
312 | } | |
313 | ||
314 | #[test] | |
315 | fn test_from_owned() { | |
316 | let foo = 123; | |
317 | let foo_arc = Arc::from(foo); | |
318 | assert!(123 == *foo_arc); | |
319 | } | |
320 | ||
321 | #[test] | |
322 | fn test_new_weak() { | |
323 | let foo: Weak<usize> = Weak::new(); | |
324 | assert!(foo.upgrade().is_none()); | |
325 | } | |
326 | ||
327 | #[test] | |
328 | fn test_ptr_eq() { | |
329 | let five = Arc::new(5); | |
330 | let same_five = five.clone(); | |
331 | let other_five = Arc::new(5); | |
332 | ||
333 | assert!(Arc::ptr_eq(&five, &same_five)); | |
334 | assert!(!Arc::ptr_eq(&five, &other_five)); | |
335 | } | |
336 | ||
337 | #[test] | |
338 | #[cfg_attr(target_os = "emscripten", ignore)] | |
416331ca XL |
339 | fn test_weak_count_locked() { |
340 | let mut a = Arc::new(atomic::AtomicBool::new(false)); | |
341 | let a2 = a.clone(); | |
342 | let t = thread::spawn(move || { | |
f9f354fc XL |
343 | // Miri is too slow |
344 | let count = if cfg!(miri) { 1000 } else { 1000000 }; | |
345 | for _i in 0..count { | |
416331ca XL |
346 | Arc::get_mut(&mut a); |
347 | } | |
348 | a.store(true, SeqCst); | |
349 | }); | |
350 | ||
351 | while !a2.load(SeqCst) { | |
352 | let n = Arc::weak_count(&a2); | |
353 | assert!(n < 2, "bad weak count: {}", n); | |
f9f354fc XL |
354 | #[cfg(miri)] // Miri's scheduler does not guarantee liveness, and thus needs this hint. |
355 | atomic::spin_loop_hint(); | |
416331ca XL |
356 | } |
357 | t.join().unwrap(); | |
358 | } | |
359 | ||
360 | #[test] | |
361 | fn test_from_str() { | |
362 | let r: Arc<str> = Arc::from("foo"); | |
363 | ||
364 | assert_eq!(&r[..], "foo"); | |
365 | } | |
366 | ||
367 | #[test] | |
368 | fn test_copy_from_slice() { | |
369 | let s: &[u32] = &[1, 2, 3]; | |
370 | let r: Arc<[u32]> = Arc::from(s); | |
371 | ||
372 | assert_eq!(&r[..], [1, 2, 3]); | |
373 | } | |
374 | ||
375 | #[test] | |
376 | fn test_clone_from_slice() { | |
377 | #[derive(Clone, Debug, Eq, PartialEq)] | |
378 | struct X(u32); | |
379 | ||
380 | let s: &[X] = &[X(1), X(2), X(3)]; | |
381 | let r: Arc<[X]> = Arc::from(s); | |
382 | ||
383 | assert_eq!(&r[..], s); | |
384 | } | |
385 | ||
386 | #[test] | |
387 | #[should_panic] | |
388 | fn test_clone_from_slice_panic() { | |
389 | use std::string::{String, ToString}; | |
390 | ||
391 | struct Fail(u32, String); | |
392 | ||
393 | impl Clone for Fail { | |
394 | fn clone(&self) -> Fail { | |
395 | if self.0 == 2 { | |
396 | panic!(); | |
397 | } | |
398 | Fail(self.0, self.1.clone()) | |
399 | } | |
400 | } | |
401 | ||
dfeec247 XL |
402 | let s: &[Fail] = |
403 | &[Fail(0, "foo".to_string()), Fail(1, "bar".to_string()), Fail(2, "baz".to_string())]; | |
416331ca XL |
404 | |
405 | // Should panic, but not cause memory corruption | |
406 | let _r: Arc<[Fail]> = Arc::from(s); | |
407 | } | |
408 | ||
409 | #[test] | |
410 | fn test_from_box() { | |
411 | let b: Box<u32> = box 123; | |
412 | let r: Arc<u32> = Arc::from(b); | |
413 | ||
414 | assert_eq!(*r, 123); | |
415 | } | |
416 | ||
417 | #[test] | |
418 | fn test_from_box_str() { | |
419 | use std::string::String; | |
420 | ||
421 | let s = String::from("foo").into_boxed_str(); | |
422 | let r: Arc<str> = Arc::from(s); | |
423 | ||
424 | assert_eq!(&r[..], "foo"); | |
425 | } | |
426 | ||
427 | #[test] | |
428 | fn test_from_box_slice() { | |
429 | let s = vec![1, 2, 3].into_boxed_slice(); | |
430 | let r: Arc<[u32]> = Arc::from(s); | |
431 | ||
432 | assert_eq!(&r[..], [1, 2, 3]); | |
433 | } | |
434 | ||
435 | #[test] | |
436 | fn test_from_box_trait() { | |
437 | use std::fmt::Display; | |
438 | use std::string::ToString; | |
439 | ||
440 | let b: Box<dyn Display> = box 123; | |
441 | let r: Arc<dyn Display> = Arc::from(b); | |
442 | ||
443 | assert_eq!(r.to_string(), "123"); | |
444 | } | |
445 | ||
446 | #[test] | |
447 | fn test_from_box_trait_zero_sized() { | |
448 | use std::fmt::Debug; | |
449 | ||
450 | let b: Box<dyn Debug> = box (); | |
451 | let r: Arc<dyn Debug> = Arc::from(b); | |
452 | ||
453 | assert_eq!(format!("{:?}", r), "()"); | |
454 | } | |
455 | ||
456 | #[test] | |
457 | fn test_from_vec() { | |
458 | let v = vec![1, 2, 3]; | |
459 | let r: Arc<[u32]> = Arc::from(v); | |
460 | ||
461 | assert_eq!(&r[..], [1, 2, 3]); | |
462 | } | |
463 | ||
464 | #[test] | |
465 | fn test_downcast() { | |
466 | use std::any::Any; | |
467 | ||
f035d41b | 468 | let r1: Arc<dyn Any + Send + Sync> = Arc::new(i32::MAX); |
416331ca XL |
469 | let r2: Arc<dyn Any + Send + Sync> = Arc::new("abc"); |
470 | ||
471 | assert!(r1.clone().downcast::<u32>().is_err()); | |
472 | ||
473 | let r1i32 = r1.downcast::<i32>(); | |
474 | assert!(r1i32.is_ok()); | |
f035d41b | 475 | assert_eq!(r1i32.unwrap(), Arc::new(i32::MAX)); |
416331ca XL |
476 | |
477 | assert!(r2.clone().downcast::<i32>().is_err()); | |
478 | ||
479 | let r2str = r2.downcast::<&'static str>(); | |
480 | assert!(r2str.is_ok()); | |
481 | assert_eq!(r2str.unwrap(), Arc::new("abc")); | |
482 | } | |
483 | ||
484 | #[test] | |
485 | fn test_array_from_slice() { | |
486 | let v = vec![1, 2, 3]; | |
487 | let r: Arc<[u32]> = Arc::from(v); | |
488 | ||
489 | let a: Result<Arc<[u32; 3]>, _> = r.clone().try_into(); | |
490 | assert!(a.is_ok()); | |
491 | ||
492 | let a: Result<Arc<[u32; 2]>, _> = r.clone().try_into(); | |
493 | assert!(a.is_err()); | |
494 | } |