package singleton
import (
"fmt"
"sync"
"testing"
"unsafe"
)
type Singleton struct {
}
var singleInstance *Singleton
var once sync.Once
func GetSingletonObj() *Singleton {
once.Do(func() {
fmt.Println("create Obj")
singleInstance = new(Singleton)
})
return singleInstance
}
func TestGetSingletonObj(t *testing.T) {
var wg sync.WaitGroup
for i := 0; i < 10; i++ {
wg.Add(1)
go func() {
obj:= GetSingletonObj()
fmt.Println("obj")
fmt.Printf("%x\n", unsafe.Pointer(obj))
wg.Done()
}()
}
wg.Wait()
}
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