Method _release_save

crates/vm/src/stdlib/_thread.rs:271–279

(&self, vm: &VirtualMachine)

        #[pymethod]
        fn _release_save(&self, vm: &VirtualMachine) -> PyResult<(usize, u64)> {
            if !self.mu.is_owned_by_current_thread() {
                return Err(vm.new_runtime_error("cannot release un-acquired lock"));
            }
            let count = self.count.swap(0, core::sync::atomic::Ordering::Relaxed);
            debug_assert!(count > 0, "RLock count underflow");
            unsafe { self.mu.unlock() };
            Ok((count, current_thread_id()))
        }

        #[pymethod]
        fn _acquire_restore(&self, state: PyTupleRef, vm: &VirtualMachine) -> PyResult<()> {