https://github.com/yuanyu90221/go_routine_channel

https://github.com/yuanyu90221/go_routine_channel

Last synced: 26 days ago
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• Host: GitHub
• URL: https://github.com/yuanyu90221/go_routine_channel
• Owner: yuanyu90221
• Created: 2020-05-11T15:49:32.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2020-05-11T15:49:59.000Z (over 4 years ago)
• Last Synced: 2024-06-19T15:07:13.559Z (8 months ago)
• Language: Go
• Size: 1000 Bytes
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# go_routine_channel

## 關鍵概念

兩個goruntine 

一個負責寫入channel ,

一個負責讀出channel

首先需要 用sync.WaitGroup讓 main routine等待 兩個routien執行完在結束

go func(ch <- chan int){

  for i := range ch { // channel 有讀到值就會印出來

    fmt.Println(i)

}

wg.Done()

}(ch)

go func(ch chan<- int) {

  ch <- 100

  ch <- 101

  ch<- 102

  // 注意這邊需要把channel close起來 因為結束之後如果 channel不close

  // read channel就會卡在那邊造成Deadlock

close(ch)

wg.Done()

}(ch)

如果是buffered  channel 因為不是blocking

所以如果塞入buffer channel的值 多於讀出的值 部會造成deadlock

可以利用 v, ok := <-ch 判斷 channel 是否被close