#pragma once
#include "common.hpp"

class SingletonA    // 懒汉式，线程不安全，空间换时间
{
private:
	SingletonA() {}			 // 构造函数私有化保证对象不会在类外被创建

	SingletonA(SingletonA&) = delete;
	SingletonA& operator=(const SingletonA&) = delete;

	static SingletonA* m_pInstance;
public:
	static SingletonA* getInstance();

};

class SingletonB       // 饿汉式，线程安全，时间换空间
{
private:
	SingletonB() {}
	SingletonB(SingletonB&) = delete;
	SingletonB& operator=(const SingletonB&) = delete;
public:
	static SingletonB* getInstance();

};