非线程安全的单例模式
type Singleton struct {
}
var instance *Singleton
func GetInstance() *Singleton {
if instance == nil {
instance = &Singleton{
}
}
return instance
}
基于互斥锁的单例模式
type Singleton struct {
}
var (
instance *Singleton
mu sync.Mutex
)
func GetInstance() *Singleton
