include/Singleton.hpp

   1 #ifndef SCX_SINGLETON_HPP
   2 #define SCX_SINGLETON_HPP
   3
   4 #include <pthread.h>
   5
   6 namespace scx {
   7
   8 template<typename T>
   9 class Singleton
  10 {
  11 public:
  12     static T& Instance()
  13     {
  14         pthread_once(&control, &Singleton::Init);
  15         return *ptrInstance;
  16     }
  17
  18 private:
  19     static void Init()
  20     {
  21         ptrInstance = new T;
  22     }
  23
  24 private:
  25     static pthread_once_t control;
  26     static T* ptrInstance;
  27 };
  28
  29 template<typename T>
  30 pthread_once_t Singleton<T>::control = PTHREAD_ONCE_INIT;
  31
  32 template<typename T>
  33 T* Singleton<T>::ptrInstance = NULL;
  34
  35 }
  36 #endif