blob: e4d7280d7c33159b76fd63ba18e923fc999f5a8f (
plain)
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
|
import context
import time
const (
// a reasonable duration to block in an example
short_duration = 1 * time.millisecond
)
// This example passes a context with an arbitrary deadline to tell a blocking
// function that it should abandon its work as soon as it gets to it.
fn test_with_deadline() {
dur := time.now().add(short_duration)
ctx := context.with_deadline(context.background(), dur)
defer {
// Even though ctx will be expired, it is good practice to call its
// cancellation function in any case. Failure to do so may keep the
// context and its parent alive longer than necessary.
context.cancel(ctx)
}
ctx_ch := ctx.done()
select {
_ := <-ctx_ch {}
1 * time.second {
panic('This should not happen')
}
}
}
// This example passes a context with a timeout to tell a blocking function that
// it should abandon its work after the timeout elapses.
fn test_with_timeout() {
// Pass a context with a timeout to tell a blocking function that it
// should abandon its work after the timeout elapses.
ctx := context.with_timeout(context.background(), short_duration)
defer {
context.cancel(ctx)
}
ctx_ch := ctx.done()
select {
_ := <-ctx_ch {}
1 * time.second {
panic('This should not happen')
}
}
}
|
