designpatterns/singleton/lazy.go

package singleton

import "sync"

var (
	lazySingleton *Singleton
	once          = &sync.Once{}
)

// GetLazyInstance
//
//	@Description: 懒汉式
//	@return *Singleton
func GetLazyInstance() *Singleton {
	if lazySingleton == nil {
		once.Do(func() {
			lazySingleton = &Singleton{}
		})
	}
	return lazySingleton
}