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Managed C++ Wrapper Class Destructor Not Getting Called

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Started by Raeldor November 05, 2006 11:26 PM

1 comment, last by Raeldor 17 years, 5 months ago

Raeldor

254

Author

November 05, 2006 11:26 PM

Hi All, I have a wrapper class like...


	MTerrain::MTerrain(String^ in_name, int in_maxSimultaneousTextures)
	{
		NW_STRING name;
		MarshalString(in_name, name);
		m_terrain=new NW::Terrain(name, in_maxSimultaneousTextures);
	}

	MTerrain::~MTerrain()
	{
		delete m_terrain;
	}

But when I use this in C# like...


MTerrain test=new Terrain("test", 8);
test=null;

The destructor is not getting called. Unless I specifically do...


test.Dispose();
test=null;

Why does the destructor not get called immediately on the test=null? Is this a function of the garbage collector? Thanks Rael

Promit

13,404

November 05, 2006 11:32 PM

Assuming you mean C++/CLI, "destructor" syntax actually causes you to implement IDisposable, and that becomes your Dispose method.

If you want to do something after all references are gone and before you're collected, you'll need to write a finalizer, which uses !Class() instead of ~Class().

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Raeldor

254

Author

November 06, 2006 09:57 AM

Quote:Original post by Promit
Assuming you mean C++/CLI, "destructor" syntax actually causes you to implement IDisposable, and that becomes your Dispose method.

If you want to do something after all references are gone and before you're collected, you'll need to write a finalizer, which uses !Class() instead of ~Class().

Thanks for the reply. When you say 'do something after all references are gone and before you're collected', does this mean !Class() gets called before ~Class()? Does ~Class() only get called when you either specifically call Dispose(), or when the garbage collector feels like it? Seems like it never gets called even after the program shuts down, which is a bit strange to me.

Managed C++ Wrapper Class Destructor Not Getting Called

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