package main
import (
"fmt"
"sync"
"time"
)
//协程并发控制,只执行一次
var num = 0
var once = sync.Once{}
func main() {
for i := 0; i <= 100; i++ {
go once.Do(addNum)
}
time.Sleep(time.Second*10)
fmt.Println(num)
}
func addNum() {
num = num + 1
}
微信扫一扫
package main
import (
"fmt"
"sync"
"time"
)
//协程并发控制,只执行一次
var num = 0
var once = sync.Once{}
func main() {
for i := 0; i <= 100; i++ {
go once.Do(addNum)
}
time.Sleep(time.Second*10)
fmt.Println(num)
}
func addNum() {
num = num + 1
}
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