Hello. I recently had to figure out how to use a C library from Perl (which means using XS, obviously). Since that felt a bit harder than it ought to, I tried to write down what I learned, in the hope that it may help someone else not have to do the exact same mistakes I did. The text is mainly intended to give a basic understanding of how things work, to the point where the ordinary documentation becomes understandable. It also gives recommendations for what docs to read in which order.
If this sounds interesting, you can find the text on my work's blog