[adrianratnapala]

> Not to make too fine a point about it here, but file handles are perfect matches for RAII / Rust lifetimes, unlike OpenGL textures.

Agreed, something like an FD matches RAII very well, but you can open one file multiple times, dup fds and multiple processes can do all this. So the FDs end up mapping in some non-trivial, probably refcounted way to other objects in the kernel.

So it seems with OpenGL, this kind of mapping / bookkeeping layer gets hoisted up into the application framework -- which might be a reasonable choice.

[klodolph]

OpenGL textures point to some refcounted thing, but the handle table is not per-process but per-context, and the contexts are not thread-safe, and the contexts can become invalidated. So it is similar in many ways but there are too many differences in general.