RE : Re: [lwip-users] where can i find out the function for time check

[Frédéric BERNON]

Uhmm, not sure to understand... sys_timeout is not done to do a time check, but 
to call "timers". To do that, you have to use sys.h (NO_SYS==0), you have to 
call sys_timeout in the thread which will have to execute your handle, and you 
have to "block" this thread with a call to sys_mbox_fetch() and sys_sem_wait(). 
Perhaps some pseudo code :

#define MYTIMER_TMR_INTERVAL 1000

static void
my_timer(void *arg)
{ myfunction_tmr();
  sys_timeout( MYTIMER_TMR_INTERVAL, my_timer, NULL);
}

Mythread()
{ sys_sem_t     sem    = SYS_SEM_NULL;

  /* Initialize timers */
  sys_timeout( MYTIMER_TMR_INTERVAL, my_timer, NULL);
  
  /* ... */

  /* Wait for ever, but with timers handling */
  sem = sys_sem_new(0);
  sys_sem_wait(sem);/* never returns */
}

More, even this feature is available, to my point of view, it's not a good 
thing to use it in your application (due to block your thread a a sys_sem_wait 
or on a sys_mbox_fetch)...

====================================
Frédéric BERNON 
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-----Message d'origine-----
De : address@hidden [mailto:address@hidden De la part de address@hidden
Envoyé : vendredi 30 mars 2007 09:42
À : Mailing list for lwIP users
Objet : ??:Re: [lwip-users] where can i find out the function for time check


On Fri, 30 Mar 2007, 朻帡瑟 wrote:
> void
> sys_timeout(u32_t msecs, sys_timeout_handler h, void *arg)
> register a handle for timeout . but where can find the function,
> we call it for timeout check and call the timeout handle registered
> by sys_timeout().

See src/core/sys.c, inside sys_mbox_fetch() and sys_sem_wait():

.
.
h(arg);
.
.

-- 
Cheers,

Tai-hwa Liang


Tai-hwa Liang thanks !
Did you mean that ,lwip doesn't define time_check_function() for time check . 
But we can edit sys_mbox_fetch() to our Own_Time_Check_Function(),for time 
check and call timeout handle .




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