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reseting pointer variable - how?

Posted on 2007-07-27
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Last Modified: 2010-04-01
I have a pointer IplImage* HSVIMage = 0; //declaration

I process the image in my thread and do some stuff to it. I am now done with it. Later in the thread I want to overwrite the image and reuse it. How do I "reset" the pointer variable for reuse? I tried releasing it ReleaseImage( &HSVIMage) and redeclaring it, but then I get a multiple reinitialization error when compiling. Is it even necessary to "reuse" it?

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Question by:Wanderinglazyeye
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by:Infinity08
ID: 19581891
Once it's released, it's best to set the pointer to 0, and then it's ready for use again, without having to re-declare it.
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Infinity08 earned 2000 total points
ID: 19581902
So, something like :

        IplImage* HSVIMage = 0;
        // create image
        // use image
        // release image
        HSVIMage = 0;

and now you can create the image again, etc. You don't have to re-use it though - you won't win anything, because you already released the memory that was allocated to the pointer.
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