Go uses channel for synchronization (buffer channel)

The last article mentioned the common channel Used for thread synchronization .Go There is also a buffer in the language channel.

ch := make(chan int, 100)

The execution type and buffer size are required .

package main

import "fmt"

func main() {
	c := make(chan int, 2) // establish int The type size is 2 The buffer 
	c <- 1  // buffer 1 The assignment is 1
	c <- 2	// buffer 2 The assignment is 2
	fmt.Println(<-c) // Output buffer 1
	fmt.Println(<-c) // Output buffer 2
}

It can cycle  for i := range c To keep coming from  channel  Receives the value , Until it's turned off .

package main

import (
	"fmt"
)

func fibonacci(n int, c chan int) {
	x, y := 1, 1
	for i := 0; i < n; i++ {
		c <- x
		x, y = y, x+y
	}
	close(c)
}

func main() {
	c := make(chan int, 10)
	go fibonacci(cap(c)+2, c)
	for i := range c {
		fmt.Println(i)
	}
}