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chan_timeout
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| package main | |
| import ( | |
| "fmt" | |
| "time" | |
| ) | |
| func main() { | |
| fmt.Println("start...", time.Now()) | |
| timeout := make(chan bool, 1) // 超时信号传输通道 | |
| go func() { // 新起协程传输控制信号; Sleep 1s后延迟释放 | |
| time.Sleep(1 * time.Second) | |
| timeout <- true | |
| }() | |
| ch := make(chan string) // 这里是一个数据通道(不知道何时会返回数据；这里永不反回) | |
| select { | |
| case msg := <-ch: // 这里尝试从数据通道获取数据(实际上永不反回) | |
| fmt.Println("get from ch: ", msg) | |
| case <-timeout: // 1s后timeout通道触发超时信号 | |
| fmt.Println("timeout!") | |
| } | |
| fmt.Println("end...", time.Now()) | |
| } |
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