Function start

subprojects/llama.cpp/common/console.cpp:1079–1098

            fflush(out);
        }
        void start() {
            std::unique_lock<std::mutex> lock(mtx);
            if (simple_io || running) {
                return;
            }
            common_log_flush(common_log_main());
            fprintf(out, "%c", LOADING_CHARS[0]);
            fflush(out);
            frame = 1;
            running = true;
            th = std::thread([]() {
                std::unique_lock<std::mutex> lock(mtx);
                while (true) {
                    if (cv_stop.wait_for(lock, wait_time, []{ return !running; })) {
                        break;
                    }
                    draw_next_frame();
                }
            });
        }
        void stop() {
            {
                std::unique_lock<std::mutex> lock(mtx);