CComClassFactorySingleton
template< class T >
class CComClassFactorySingleton : public CComClassFactory
Parameters
T
Your class.
CComClassFactorySingleton derives from CComClassFactory and uses CComObjectGlobal to construct a single object. Each call to the CreateInstance method simply queries this object for an interface pointer.
ATL objects normally acquire a class factory by deriving from CComCoClass. This class includes the macro DECLARE_CLASSFACTORY, which declares CComClassFactory as the default class factory. To use CComClassFactorySingleton, specify the DECLARE_CLASSFACTORY_SINGLETON macro in your object’s class definition. For example:
class CMyClass : ..., public CComCoClass< ... >
{
public:
DECLARE_CLASSFACTORY_SINGLETON(CMyClass)
...
};
#include <atlcom.h>
See Also , CComClassFactory2, CComClassFactoryAutoThread, CComObjectRootEx, CComGlobalsThreadModel