134     // We need to wait for the pending wait process and stop it.  in run()
219             // We've already been running and there might a completion pending.  in caller_run()
232         // There might be pending completions still, so spawn a watcher for  in caller_run()
240     auto worker = std::exchange(pending, nullptr);  in wait_for_wait_process_stopped()
265     // need to `wait`, because there might be yet another pending operation  in arm()
291     // Assign ourselves as the pending completion and release the caller.  in arm()
307             return (ctx.pending != nullptr) || (ctx.staged != nullptr) ||  in wait_once()
311         // Save the waiter as pending.  in wait_once()
312         if (ctx.pending == nullptr)  in wait_once()
314             ctx.pending = std::exchange(ctx.staged, nullptr);  in wait_once()
320     if (!ctx.final_stop.stop_requested() && ctx.pending)  in wait_once()
322         ctx.event_loop.run_one(ctx.pending->timeout);  in wait_once()
330     auto pending = std::exchange(self->pending, nullptr);  in dbus_event_handle()  local
331     if (pending != nullptr)  in dbus_event_handle()
333         pending->complete();  in dbus_event_handle()