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How to close golang coroutine

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Dec 28, 2019 am 10:14 AM

golang

How to close golang coroutine

1. Pass the exit signal through Channel

Channel is a basic data type of go. It has 3 basic states: nil, open, closed.

Share data through Channel instead of sharing data through shared memory. The main process can send a stop signal to any goroutine through the channel, like the following:

func run(done chan int) {
        for {
                select {
                case <p id="sec-2"><strong>2. Use waitgroup</strong></p><p>Normally, we use waitgroup like the following :</p><p>1. Create an instance of Waitgroup, assuming we call it wg</p><p>2. When each goroutine starts, call wg.Add(1). This operation can be done in Called before goroutine starts, it can also be called inside goroutine. Of course, you can also call wg.Add(n)</p><p>3 before creating n goroutines. When each goroutine completes its task, call wg.Done()</p><p>4. Wait for all The goroutine calls wg.Wait(), which blocks before all goroutines that have executed wg.Add(1) have called wg.Done(). It will return after all goroutines have called wg.Done(). </p><p>Example: <br></p><pre class="brush:php;toolbar:false">type Service struct {
        // Other things
 
        ch        chan bool
        waitGroup *sync.WaitGroup
}
 
func NewService() *Service {
	s := &Service{
                // Init Other things
                ch:        make(chan bool),
                waitGroup: &sync.WaitGroup{},
	}
 
	return s
}
 
func (s *Service) Stop() {
        close(s.ch)
        s.waitGroup.Wait()
}
 
func (s *Service) Serve() {
        s.waitGroup.Add(1)
        defer s.waitGroup.Done()
 
        for {
                select {
                case <p>For more golang knowledge, please pay attention to the <a href="//m.sbmmt.com/be/go/" target="_blank">golang tutorial</a> column. <br></p>

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