Go by Example: Goroutines

Goroutina - bu yengil bajarilish oqimidir.

 
package main
 
import (
    "fmt"
    "time"
)
 
func f(from string) {
    for i := range 3 {
        fmt.Println(from, ":", i)
    }
}
 
func main() {

Faraz qilaylik, bizda f(s) funksiya chaqiruvi bor. Mana uni odatdagidek, sinxron tarzda ishga tushirib chaqiramiz.

 
    f("direct")

Ushbu funksiyani goroutinada chaqirish uchun go f(s) dan foydalaning. Bu yangi goroutina chaqiruvchi goroutina bilan parallel bajariladi.

 
    go f("goroutine")

Shuningdek, anonim funksiya chaqiruvi uchun goroutina ishga tushirishingiz mumkin.

 
    go func(msg string) {
        fmt.Println(msg)
    }("going")

Endi bizning ikkita funksiya chaqiruvimiz alohida goroutinalarda asinxron ishlamoqda. Ularning tugashini kuting (yanada ishonchli yondashuv uchun WaitGroup dan foydalaning).

 
    time.Sleep(time.Second)
    fmt.Println("done")
}

Ushbu dasturni ishga tushirganimizda, avval bloklovchi chaqiruvning natijasini, so’ngra ikkita goroutinaning natijasini ko’ramiz. Goroutinalarning natijasi aralashib ketishi mumkin, chunki goroutinalar Go runtime tomonidan parallel ishga tushiriladi.

 
$ go run goroutines.go
direct : 0
direct : 1
direct : 2
goroutine : 0
going
goroutine : 1
goroutine : 2
done

Keyingi misolda biz parallel Go dasturlarida goroutinalarni to’ldiruvchi vositani ko’rib chiqamiz: kanallar.

Keyingi misol: .

mualliflar: Mark McGranaghan va Eli Bendersky | tarjima: @elchintoyirov | manba | litsenziya