C++的单例模式

Student.h

#ifndef __SINGLETON_H__
#define __SINGLETON_H__

#include <memory>

template<class T>
class SingleT
{
public:
    static T * Instance()
    {
        if (!p)
        {
            p = new T;
        }

        return p;
    }

    static void Create()
    {
        if (!p)
        {
            p = new T;
        }
    }

    static void Destroy()
    {
        if (p)
        {
            delete p;
            p = NULL;
        }
    }

    static T * Get()
    {
        return p;
    }

    static void Reset()
    {
        Destroy();
        Create();
    }

protected:
    static T * p;
};

template <class T>
T * SingleT<T>::p = NULL;

#endif

定义另外一个测试类：SingletonTest.h

#ifndef __SINGLETONTEST_H__
#define __SINGLETONTEST_H__

#include "Singleton.h"

#include <iostream>

class SingletonTest : public SingleT<SingletonTest>
{
public:
    SingletonTest(){};
    ~SingletonTest(){};

public:
    inline void test() {std::cout<<"test()"<<std::endl;}
};

#endif

 

调用测试：SingletonTest::Instance()->test();