I don't understand sync and sync/atomic. why where and when i should use this?

AnikHasibul · April 28, 2018, 9:28am

Why I should use sync/atomic?

Yep, i used sync for waiting a routine to be done. here sync helped me.

but why sync/atomic?

why it’s important in many other projects?

vitr · April 28, 2018, 11:28am

please read Dancing with Go’s Mutexes and Matt’s comment:

I might also add that if you find yourself mutexing integers, consider using sync/atomic’s primitive functions. These operations perform very well in high-load situations and don’t require you to manage a mutex.

sunnykarira · April 29, 2018, 1:03pm

One use case.

github.com

goinaction/code/blob/master/chapter6/listing15/listing15.go

// This sample program demonstrates how to use the atomic
// package functions Store and Load to provide safe access
// to numeric types.
package main

import (
	"fmt"
	"sync"
	"sync/atomic"
	"time"
)

var (
	// shutdown is a flag to alert running goroutines to shutdown.
	shutdown int64

	// wg is used to wait for the program to finish.
	wg sync.WaitGroup
)

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system · July 28, 2018, 1:03pm

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