1.单例模式https://www.jianshu.com/p/69eef7651667
class SubscInstance
{
private:
SubscInstance() {};
~SubscInstance() {};
public:
class one
{
public:
one() { CreateSubscInstance(); }
~one() { ReleaseSubscInstance(); }
};
static one o;
};
SubscInstance::one SubscInstance::o;
