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July 5, 2022 16:22
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There is a race condition when you want to reuse Timer instance with Reset method.
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| package main | |
| import "time" | |
| func main() { | |
| for i := 0; i < 10000; i++ { | |
| timer := time.NewTimer(time.Microsecond) | |
| time.Sleep(time.Microsecond) | |
| flat := false | |
| if !timer.Stop() { | |
| select { | |
| case <-timer.C: | |
| default: | |
| flat = true | |
| } | |
| } | |
| if flat { | |
| timer.Reset(5 * time.Second) | |
| select { | |
| case <-timer.C: | |
| println("hello") // this will print immediately | |
| } | |
| } | |
| } | |
| } |
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