c++单例模式模板类

singleton.h

#ifndef __SINGLETON_H__
#define __SINGLETON_H__

template<typename T>
class Singleton
{
  public:
  static T* Instance() {
  static T instance;
  return &instance;
}

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

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

#endif //!__SINGLETON_H__

示例：

class LogUtil : public Singleton<LogUtil>
{
public:
  LogUtil();
  virtual ~LogUtil();
  int Log(std::string str);
}

LogUtil::Instance()->Log("单例模式");