Function keep_alive

examples/server/httplib.h:2569–2586

#endif

inline bool keep_alive(socket_t sock, time_t keep_alive_timeout_sec) {
  using namespace std::chrono;
  auto start = steady_clock::now();
  while (true) {
    auto val = select_read(sock, 0, 10000);
    if (val < 0) {
      return false;
    } else if (val == 0) {
      auto current = steady_clock::now();
      auto duration = duration_cast<milliseconds>(current - start);
      auto timeout = keep_alive_timeout_sec * 1000;
      if (duration.count() > timeout) { return false; }
      std::this_thread::sleep_for(std::chrono::milliseconds(1));
    } else {
      return true;
    }
  }
}

template <typename T>
inline bool