Function next_func_version

crates/vm/src/builtins/function.rs:85–89

Atomically allocate the next function version, returning 0 if exhausted. Once the counter wraps to 0, it stays at 0 permanently.

()

/// Atomically allocate the next function version, returning 0 if exhausted.
/// Once the counter wraps to 0, it stays at 0 permanently.
fn next_func_version() -> u32 {
    FUNC_VERSION_COUNTER
        .fetch_update(Relaxed, Relaxed, |v| (v != 0).then(|| v.wrapping_add(1)))
        .unwrap_or(0)
}

unsafe impl Traverse for PyFunction {
    fn traverse(&self, tracer_fn: &mut TraverseFn<'_>) {