I don't think anybody proficient enough for such a port would encounter your issue because they would take care of differences of Unix/Linux compared to Windows. In Linux OS mostly everything i a file and /dev/urandom is the non-blocking random number generating device (file). Reading from this file gives you not blocking random numbers.

You would have to port everything that's specific to Linux to the way it's done in Windows OS. Are you sure you have the knowledge to do this? Based on your question, I hightly doubt it.