1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
|
#![warn(rust_2018_idioms)]
#![allow(clippy::declare_interior_mutable_const)]
#![cfg(all(feature = "full", tokio_unstable))]
#[cfg(not(tokio_wasi))]
use std::error::Error;
use std::future::Future;
use std::pin::Pin;
use std::task::{Context, Poll};
#[cfg(not(tokio_wasi))]
use tokio::runtime::{Builder, Runtime};
use tokio::sync::oneshot;
use tokio::task::{self, Id, LocalSet};
#[cfg(not(tokio_wasi))]
mod support {
pub mod panic;
}
#[cfg(not(tokio_wasi))]
use support::panic::test_panic;
#[tokio::test(flavor = "current_thread")]
async fn task_id_spawn() {
tokio::spawn(async { println!("task id: {}", task::id()) })
.await
.unwrap();
}
#[cfg(not(tokio_wasi))]
#[tokio::test(flavor = "current_thread")]
async fn task_id_spawn_blocking() {
task::spawn_blocking(|| println!("task id: {}", task::id()))
.await
.unwrap();
}
#[tokio::test(flavor = "current_thread")]
async fn task_id_collision_current_thread() {
let handle1 = tokio::spawn(async { task::id() });
let handle2 = tokio::spawn(async { task::id() });
let (id1, id2) = tokio::join!(handle1, handle2);
assert_ne!(id1.unwrap(), id2.unwrap());
}
#[cfg(not(tokio_wasi))]
#[tokio::test(flavor = "multi_thread")]
async fn task_id_collision_multi_thread() {
let handle1 = tokio::spawn(async { task::id() });
let handle2 = tokio::spawn(async { task::id() });
let (id1, id2) = tokio::join!(handle1, handle2);
assert_ne!(id1.unwrap(), id2.unwrap());
}
#[tokio::test(flavor = "current_thread")]
async fn task_ids_match_current_thread() {
let (tx, rx) = oneshot::channel();
let handle = tokio::spawn(async {
let id = rx.await.unwrap();
assert_eq!(id, task::id());
});
tx.send(handle.id()).unwrap();
handle.await.unwrap();
}
#[cfg(not(tokio_wasi))]
#[tokio::test(flavor = "multi_thread")]
async fn task_ids_match_multi_thread() {
let (tx, rx) = oneshot::channel();
let handle = tokio::spawn(async {
let id = rx.await.unwrap();
assert_eq!(id, task::id());
});
tx.send(handle.id()).unwrap();
handle.await.unwrap();
}
#[cfg(not(tokio_wasi))]
#[tokio::test(flavor = "multi_thread")]
async fn task_id_future_destructor_completion() {
struct MyFuture {
tx: Option<oneshot::Sender<Id>>,
}
impl Future for MyFuture {
type Output = ();
fn poll(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<()> {
Poll::Ready(())
}
}
impl Drop for MyFuture {
fn drop(&mut self) {
let _ = self.tx.take().unwrap().send(task::id());
}
}
let (tx, rx) = oneshot::channel();
let handle = tokio::spawn(MyFuture { tx: Some(tx) });
let id = handle.id();
handle.await.unwrap();
assert_eq!(rx.await.unwrap(), id);
}
#[cfg(not(tokio_wasi))]
#[tokio::test(flavor = "multi_thread")]
async fn task_id_future_destructor_abort() {
struct MyFuture {
tx: Option<oneshot::Sender<Id>>,
}
impl Future for MyFuture {
type Output = ();
fn poll(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<()> {
Poll::Pending
}
}
impl Drop for MyFuture {
fn drop(&mut self) {
let _ = self.tx.take().unwrap().send(task::id());
}
}
let (tx, rx) = oneshot::channel();
let handle = tokio::spawn(MyFuture { tx: Some(tx) });
let id = handle.id();
handle.abort();
assert!(handle.await.unwrap_err().is_cancelled());
assert_eq!(rx.await.unwrap(), id);
}
#[tokio::test(flavor = "current_thread")]
async fn task_id_output_destructor_handle_dropped_before_completion() {
struct MyOutput {
tx: Option<oneshot::Sender<Id>>,
}
impl Drop for MyOutput {
fn drop(&mut self) {
let _ = self.tx.take().unwrap().send(task::id());
}
}
struct MyFuture {
tx: Option<oneshot::Sender<Id>>,
}
impl Future for MyFuture {
type Output = MyOutput;
fn poll(mut self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Self::Output> {
Poll::Ready(MyOutput { tx: self.tx.take() })
}
}
let (tx, mut rx) = oneshot::channel();
let handle = tokio::spawn(MyFuture { tx: Some(tx) });
let id = handle.id();
drop(handle);
assert!(rx.try_recv().is_err());
assert_eq!(rx.await.unwrap(), id);
}
#[tokio::test(flavor = "current_thread")]
async fn task_id_output_destructor_handle_dropped_after_completion() {
struct MyOutput {
tx: Option<oneshot::Sender<Id>>,
}
impl Drop for MyOutput {
fn drop(&mut self) {
let _ = self.tx.take().unwrap().send(task::id());
}
}
struct MyFuture {
tx_output: Option<oneshot::Sender<Id>>,
tx_future: Option<oneshot::Sender<()>>,
}
impl Future for MyFuture {
type Output = MyOutput;
fn poll(mut self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Self::Output> {
let _ = self.tx_future.take().unwrap().send(());
Poll::Ready(MyOutput {
tx: self.tx_output.take(),
})
}
}
let (tx_output, mut rx_output) = oneshot::channel();
let (tx_future, rx_future) = oneshot::channel();
let handle = tokio::spawn(MyFuture {
tx_output: Some(tx_output),
tx_future: Some(tx_future),
});
let id = handle.id();
rx_future.await.unwrap();
assert!(rx_output.try_recv().is_err());
drop(handle);
assert_eq!(rx_output.await.unwrap(), id);
}
#[test]
fn task_try_id_outside_task() {
assert_eq!(None, task::try_id());
}
#[cfg(not(tokio_wasi))]
#[test]
fn task_try_id_inside_block_on() {
let rt = Runtime::new().unwrap();
rt.block_on(async {
assert_eq!(None, task::try_id());
});
}
#[tokio::test(flavor = "current_thread")]
async fn task_id_spawn_local() {
LocalSet::new()
.run_until(async {
task::spawn_local(async { println!("task id: {}", task::id()) })
.await
.unwrap();
})
.await
}
#[tokio::test(flavor = "current_thread")]
async fn task_id_nested_spawn_local() {
LocalSet::new()
.run_until(async {
task::spawn_local(async {
let parent_id = task::id();
LocalSet::new()
.run_until(async {
task::spawn_local(async move {
assert_ne!(parent_id, task::id());
})
.await
.unwrap();
})
.await;
assert_eq!(parent_id, task::id());
})
.await
.unwrap();
})
.await;
}
#[cfg(not(tokio_wasi))]
#[tokio::test(flavor = "multi_thread")]
async fn task_id_block_in_place_block_on_spawn() {
task::spawn(async {
let parent_id = task::id();
task::block_in_place(move || {
let rt = Builder::new_current_thread().build().unwrap();
rt.block_on(rt.spawn(async move {
assert_ne!(parent_id, task::id());
}))
.unwrap();
});
assert_eq!(parent_id, task::id());
})
.await
.unwrap();
}
#[cfg(not(tokio_wasi))]
#[test]
fn task_id_outside_task_panic_caller() -> Result<(), Box<dyn Error>> {
let panic_location_file = test_panic(|| {
let _ = task::id();
});
// The panic location should be in this file
assert_eq!(&panic_location_file.unwrap(), file!());
Ok(())
}
#[cfg(not(tokio_wasi))]
#[test]
fn task_id_inside_block_on_panic_caller() -> Result<(), Box<dyn Error>> {
let panic_location_file = test_panic(|| {
let rt = Runtime::new().unwrap();
rt.block_on(async {
task::id();
});
});
// The panic location should be in this file
assert_eq!(&panic_location_file.unwrap(), file!());
Ok(())
}
|
