How do i get a std::shared_ptr from "this"

[Matze74]

Hi,

i would like to know if it`s possible to get a std::shared_ptr from "this".

Let`s asume the following code, using standard-pointer:

void AbstractRenderWindow::render(AbstractRenderWindow* pRenderWindow)
{
	AbstractContainer::render(pRenderWindow);
}

void AbstractRenderWindow::renderLoop()
{
	this->render(this);	
}

This works, but now i would like to pass a std::shared_ptr to my base-class function:

void AbstractRenderWindow::render(std::shared_ptr<AbstractRenderWindow> pRenderWindow)
{
	AbstractContainer::render(pRenderWindow);
}

void AbstractRenderWindow::renderLoop()
{
	this->render(this); // <--- ???
}

Normally this is not a problem, since i just have to pass the already known shared_ptr. But i have a special case in the root class (the RenderWindow) which inhertiances from AbstractContainer and this from AbstractControl.

So i have to call render(this) in that special case. I asked google and found a solution, to use a shared_ptr with getPtr(), but this does`nt seem to work on "this".

Is this possible what i want to do? Or do i have to pass my shared_ptr of that instance to the ctor from the calling class?

Please excuse my low english.
Thanks for all tips in advance,

Mathias

[MiiNiPaa]

This might help:
http://stackoverflow.com/questions/712279/what-is-the-usefulness-of-enable-shared-from-this
http://en.cppreference.com/w/cpp/memory/enable_shared_from_this

[Matze74]

Thank you! This helped a lot and it works fine!

Btw: after i posted my question another solution came to my mind: making the root-class a singleton (since the root can only exists one time), but i think that would be generally a bad design idea?