Go Atomic Variable

by Online Tutorials Library July 14, 2022

Go Atomic Variable

Atomic variables are used to manage state, though sync/atomic package and avoid race conditions. Atomic counters can be accessed by multiple go routines.

Go Atomic Variable Example

 package main import (    “sync”    “time”    “math/rand”    “fmt”    “sync/atomic” ) var wait sync.WaitGroup var count int64 func  increment(s string)  {    for i :=0;i<10;i++ {       time.Sleep(time.Duration((rand.Intn(3)))*time.Millisecond)       atomic.AddInt64(&count,1)       fmt.Println(s,i,”Count ->”,count)    }    wait.Done() } func main(){    wait.Add(2)    go increment(“foo: “)    go increment(“bar: “)    wait.Wait()    fmt.Println(“last count value ” ,count) } 

Output:

foo:  0 Count -> 1 foo:  1 Count -> 2 bar:  0 Count -> 3 bar:  1 Count -> 4 bar:  2 Count -> 5 foo:  2 Count -> 6 bar:  3 Count -> 7 bar:  4 Count -> 8 bar:  5 Count -> 9 foo:  3 Count -> 10 bar:  6 Count -> 11 bar:  7 Count -> 12 foo:  4 Count -> 13 foo:  5 Count -> 14 bar:  8 Count -> 15 bar:  9 Count -> 16 foo:  6 Count -> 17 foo:  7 Count -> 18 foo:  8 Count -> 19 foo:  9 Count -> 20 last count value  20

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Go Atomic Variable

Go Atomic Variable

Go Atomic Variable Example

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