GoRoutines
A lightweight thread managed by go, same address space, must sync access to shared mem
go f(x, y, z) //starts goroutine running f(x,y,z)
Channels
Channels are a typed conduit through which you can send and receive values with the channel operator, <-
.
ch <- v // Send v to channel ch.
v := <-ch // Receive from ch, and
// assign value to v.
(The data flows in the direction of the arrow.)
Like maps and slices, channels must be created before use:
ch := make(chan int)
By default, sends and receives block until the other side is ready.
Sum Example
package main
import "fmt"
func sum(s []int, c chan int) {
sum := 0
for _, v := range s {
sum += v
}
c <- sum // send sum to c
}
func main() {
s := []int{7, 2, 8, -9, 4, 0}
c := make(chan int)
go sum(s[:len(s)/2], c)
go sum(s[len(s)/2:], c)
x, y := <-c, <-c // receive from c
fmt.Println(x, y, x+y)
}
Last updated