template for implementing singleton classes. More...
#include <singletonref.hxx>
Public Member Functions | |
| SingletonRef () | |
| standard ctor. | |
| ~SingletonRef () | |
| standard dtor. | |
| SingletonClass * | operator-> () const |
| Allows rSingle->someBodyOp(). | |
| SingletonClass & | operator* () const |
| Allows (*rSingle).someBodyOp(). | |
template for implementing singleton classes.
Such classes can be instantiated every time they
are needed. But the internal wrapped object will
be created one times only. Of course it's used
resources are referenced one times only too.
This template hold it alive till the last
reference is gone. Further all operations
on this reference are threadsafe. Only
calls directly to the internal object (which modify
its state) must be made threadsafe by the object itself
or from outside.
The only chance to suppress such strange constellations is a lazy-init mechanism.
Note further that this singleton pattern can work only, if all user of such singleton are located inside the same library! Because static values can't be exported - e.g. from windows libraries.
|
inline |
standard ctor.
The internal wrapped object is created only,
if its ref count was 0. Otherwise this method
does nothing ... except increasing of the internal
ref count!
|
inline |
standard dtor.
The internal wrapped object is removed only,
if its ref count will be 0. Otherwise this method
does nothing ... except decreasing of the internal
ref count!
|
inline |
Allows (*rSingle).someBodyOp().
|
inline |
Allows rSingle->someBodyOp().