Function nonblocking

libcaf_net/caf/net/socket.cpp:144–148

}

error nonblocking(socket x, bool new_value) {
  u_long mode = new_value ? 1 : 0;
  CAF_NET_SYSCALL("ioctlsocket", res, !=, 0, ioctlsocket(x.id, FIONBIO, &mode));
  return none;
}

error receive_timeout(socket x, timespan timeout) {
  auto msec = static_cast<DWORD>(timeout.count() / 1'000'000);