Method with_worker_cold

src/thread_pool.rs:404–410

(&'static self, func: F)

                // Terminate and wake the workers.
                let member_data = self.get_member_data();
                for worker in &terminating_workers {
                    // Tell the worker to halt.
                    worker.control.halt.store(true, Ordering::Relaxed);
                    // Signal the worker.
                    member_data.semaphores[worker.member_index].signal();
                }

                // Drop the lock on the state so as not to block the workers or
                // heartbeat.
                drop(managed_workers);