Experimental Physics and
Industrial Control System

Hi folks,

My plugin needs to build and output a very large image - 1GB would not be surprising.  The contents of the image are gradually accumulated as many images are produced by the detector driver.  I'm not sure how I can make this 'fit' the NDArray/NDArrayPool architecture.  If I make the accumulator image a private area of memory then I could copy to an output NDArray when required - but that requires even more memory.

My ideal approach would be for my plugin to allocate the accumulator array (a 'worker' class currently encapsulates this), and only when the output is required would a pointer to this memory be used to 'publish' the result through an NDArray.

If I created a private NDArray and set its pData pointer to my accumulator image, could I then pass this to doCallbacksGenericPointer instead of the usual this->pArrays[0]?  If so, that call would presumably be inexpensive unless/until a client subscribed to the output port?

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