duangaoe9401
duangaoe9401
2018-05-20 20:10
浏览 18
已采纳

这个goroutine是否永远泄漏/阻塞?

Was curious about the following behavior

func test() error {
        ctx, cancel := context.WithCancel(context.Background())
        cancel()
        doneChan := make(chan bool)
        go func() {
            // emulate a long running function
            time.Sleep(time.Minute)
            // never exits?
            doneChan <- true
        }()
        select {
        case <- ctx.Done():
            return ctx.Err()
        case <- doneChan:
            return nil
        }
}

Given the function above, if the select statement chooses the context cancellation is the goroutine trying to push onto the doneChan blocked forever? Is the solution to simply always have a buffered channel in such cases?

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1条回答 默认 最新

  • dongzuoyue6556
    dongzuoyue6556 2018-05-20 21:04
    已采纳

    To close this question out...the simple answer is yes.

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