go | channel direction、channel sync、channelbuffer

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go 中的管道通信

管道通信直连，管道的特点就是单工，一方只能接受/发送

package main
import ("fmt"
)func ping(pings chan<- string, msg string){pings <- msg
}/*函数pong中 参数pings 是一个接收通道（只能从管道接收数据）参数pongs 是一个发送通道（只能发送数据给管道）<-  在最前头就是发送，反之就是接收
*/
func pong(pings <-chan string, pongs chan<- string){/*      msg := <- pingspong  <- msg*/msg := <-pings // pong函数从只接收通道接收数据  pongs <- msg  // 然后向只发送通道发送数据  
}func  main(){pings := make(chan string, 1)pongs := make(chan string, 1)ping(pings, "hello world ! my name is zhangbuda ...")pong(pings, pongs)fmt.Println(<- pongs)
}

#运行结果
hello world ! my name is zhangbuda ...

go 的管道通信，同步

package main
import ("fmt""time"
)
func worker(done chan bool){fmt.Println("working ...")time.Sleep(time.Second *2)fmt.Println("work done ...")done <- true
}/*实现管道通信同步
*/
func main(){done := make(chan bool, 1)go worker(done)flag := false flag = <- doneif flag {fmt.Println("the main func is end ...")}}

#运行结果
working ...
work done ...
the main func is end ...

管道缓冲

package main
import ("fmt"
)func main(){message := make(chan string, 5)message <- "hello world..."message <- "my name is zhangbuda!!!"message <- "how are you?"message <- "are you fine?"message <- "yeah, I'm fine!!"for i:=0; i < 5; i++{fmt.Println(<-message)}
}

#运行结果
hello world...
my name is zhangbuda!!!
how are you?
are you fine?
yeah, I'm fine!!

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