00001 template <typename T, typename InstanceArg> class Singleton {
00002 public:
00003 static T* getInstance() {
00004 if(Singleton<T,InstanceArg>::m_pInstance == 0) {
00005 Singleton<T,InstanceArg>::m_pInstance = new T();
00006 return Singleton<T,InstanceArg>::m_pInstance;
00007 }
00008 else
00009 return Singleton<T,InstanceArg>::m_pInstance;
00010 }
00011 static T* getInstance(InstanceArg *Arg) {
00012 if(Singleton<T,InstanceArg>::m_pInstance == 0) {
00013 Singleton<T,InstanceArg>::m_pInstance = new T(Arg);
00014 return Singleton<T,InstanceArg>::m_pInstance;
00015 }
00016 else
00017 return Singleton<T,InstanceArg>::m_pInstance;
00018 }
00019
00020 private:
00021 static T* m_pInstance;
00022 };
00023
00024 template <typename T> class SingletonNoArg {
00025 public:
00026 static T* getInstance() {
00027 if(SingletonNoArg<T>::m_pInstance == 0) {
00028 SingletonNoArg<T>::m_pInstance = new T();
00029 return SingletonNoArg<T>::m_pInstance;
00030 }
00031 else
00032 return SingletonNoArg<T>::m_pInstance;
00033 }
00034
00035 private:
00036 static T* m_pInstance;
00037 };
00038
00039 template <class T,class InstanceArg> T* Singleton<T,InstanceArg>::m_pInstance = 0;
00040 template <typename T> T* SingletonNoArg<T>::m_pInstance = 0;
