パターン集 - wikimemo

・シングルトン
template< typename To_ > class CSingleton
{
 
public:
       typedef To_     object_type;
 
public:
       static object_type*     GetInstance( void )
       {
               if ( m_pInstance == NULL )
               {
                       m_pInstance     = new object_type();
               }
               return m_pInstance;
       };
 
       static void     ReleaseInstance( void )
       {
               if ( m_pInstance != NULL )
               {
                       delete m_pInstance;
                       m_pInstance     = NULL;
               }
       };
 
       static bool     IsInstance( void )
       {
               return (m_pInstance != NULL);
       };
 
protected:
       CSingleton( void ) {
       };
 
       virtual ~CSingleton( void ) {
       };
 
private:
       CSingleton( const CSingleton& );
       CSingleton& operator=( const CSingleton& );
 
private:
       static object_type*     m_pInstance;
 
};
 
template< typename To_ > typename CSingleton< To_ >::object_type*
CSingleton< To_ >::m_pInstance  = NULL;