36 lines
748 B
Go
36 lines
748 B
Go
// 有缓冲的channel
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package main
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import (
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"fmt"
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"time"
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)
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func main() {
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c := make(chan int, 3) // 带有缓冲的channel
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fmt.Println("len(c) = ", len(c), ", cap(c) = ", cap(c))
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// 做一个go程
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go func() {
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defer fmt.Println("子go程结束")
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// 如果循环3将不会阻塞，大于3就会阻塞
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for i := 0; i < 4; i++ {
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// 把i传递给channel
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c <- i
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fmt.Println("子go程正在运行, 发送元素: ", i, ", len(c) = ", len(c), ", cap(c) = ", cap(c))
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}
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}()
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time.Sleep(2 * time.Second)
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for i := 0; i < 4; i++ {
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num := <-c
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fmt.Println("num = ", num)
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// 如果这里不阻塞的话，那么子go程在第2轮之后有可能不会打印
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time.Sleep(1 * time.Second)
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}
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fmt.Println("主进程main结束")
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}
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