>when you a pass a pointer to my function, do I take ownership of your pointer or not?

It's honestly frustrating how prevalent this is in C, and the docs don't even tell you this, and if you guess it does take ownership and make a copy for it and you were wrong, now you just leaked memory, or if you guessed the other way now you have the potential to double-free it, use after free, or have it mutated behind your back.