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[CisMine]

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[WellRestedSloth]

Hi, I am thoroughly enjoying your CUDA-C posts. Very informative. Please keep it up!
I have a couple of CUDA-related questions, not sure if this is the right place, or if it will be covered in a later chapter. It's regarding a kernel that may return an unknown number of answers. How to set up the output buffer in that case?

For example:
Input: 2 Large 1-D arrays (lets call them A and B) initialized to random integers
I need to find out which indexes in A and B add up to a certain number?
Of course there could be no indexes, or many indexes. How do I pass the data back to the calling function from the kernel? Is this the most optimal way?

[CisMine]

it will be covered in a later chapter but if you want, you can check this keyword: Atomic function