Re: [lwip-users] lwip_select() blocks even if timeout is 0

[Rishi Khan]

Are you using 1.3.0?
In my code it says:
  /* If we don't have any current events, then suspend if we are  
supposed to */
  if (!nready) {
    if (timeout && timeout->tv_sec == 0 && timeout->tv_usec == 0) {
      sys_sem_signal(selectsem);
      if (readset)
        FD_ZERO(readset);
      if (writeset)
        FD_ZERO(writeset);
      if (exceptset)
        FD_ZERO(exceptset);

      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: no timeout,  
returning 0\n"));
      set_errno(0);

      return 0;
    }


On Oct 6, 2008, at 11:57 AM, Chu, Zhenwei wrote:

> Hi,
>
> It seems that lwIP_select() always block even if timeout is set to 0.
>
> The call stack shows it stops at
> sys_sem_wait(sem);  (line 316: sys.c)
> sys_sem_wait_timeout();
>
> Any suggestions?
>
> Thanks
>
> Zhenwei Chu
>
>
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