Singleton 单例模板

// singleton.h

#ifndef SINGLETON_H
#define SINGLETON_H

// 单例基类模板
template <class T>
class Singleton
{
public:
    static T& give_me()
    {
        static T s_inst;
        return s_inst;
    }

private:
    // 禁止实现拷贝构造与拷贝赋值函数
    explicit Singleton(const Singleton<T> &rhs);
    Singleton<T>& operator = (const Singleton<T> &rhs);

protected:
    explicit Singleton()    {}
    virtual ~Singleton()    {}
};

#endif // SINGLETON_H

#ifndef TEST_MANAGER_H
#define TEST_MANAGER_H

#include "singleton.h"

class TestManager : public Singleton<TestManager>
{
    friend class Singleton<TestManager>;

private:
    explicit TestManager();
    virtual ~TestManager();

public:
    void func();
};

#endif // TEST_MANAGER_H