golang的生產者消費者模型示例

package main

import "fmt"

func Producer(ch chan int) {
	for i := 1; i <= 10; i++ {
		ch <- i
	}
	close(ch)
}

func Consumer(id int, ch chan int, done chan bool) {
	for {
		value, ok := <-ch
		if ok {
			fmt.Printf("id: %d, recv: %d\n", id, value)
		} else {
			fmt.Printf("id: %d, closed\n", id)
			break
		}
	}
	done <- true
}

func main() {
	ch := make(chan int, 3)

	coNum := 2
	done := make(chan bool, coNum)
	for i := 1; i <= coNum; i++ {
		go Consumer(i, ch, done)
	}

	go Producer(ch)

	for i := 1; i <= coNum; i++ {
		<-done
	}
}

運行結果：

$ ./chan2 
id: 2, recv: 1
id: 1, recv: 2
id: 1, recv: 4
id: 1, recv: 5
id: 1, recv: 6
id: 2, recv: 3
id: 2, recv: 8
id: 2, recv: 9
id: 2, recv: 10
id: 2, closed
id: 1, recv: 7
id: 1, closed

　　

一個生產者，兩個消費者。生產者生成20次，消費者各消費10次。

package main

import "fmt"

func Producer(ch chan int) {
	for i := 1; i <= 20; i++ {
		ch <- i
	}
	close(ch)
}

func Consumer(id int, ch chan int, done chan bool) {
	for i := 0; i < 10; i++ {
		fmt.Println(id, <-ch)
	}
	done <- true
}

func main() {
	ch := make(chan int)

	coNum := 2
	done := make(chan bool, coNum)
	for i := 1; i <= coNum; i++ {
		go Consumer(i, ch, done)
	}

	go Producer(ch)

	for i := 1; i <= coNum; i++ {
		<-done
	}
}