[lwip-users] Re: [lwip] timers in standalone app?

[Adam Dunkels]

Hi Leon!

On Thursday 24 January 2002 16.10, you wrote:
> I lost it.

;-)

> In a stand-alone application, how would I use sys_timeout()?
>
> I see it enlists a timer, but who or what is responsible for managing
> the timers and handling timeouts?
>
> Should I be calling a certain function on a regular interval in order
> to drive the timers?

Timeouts are handled in the sys_sem_wait() and sys_mbox_fetch() functions 
which in turn uses the sys_arch_sem_wait() and sys_arch_mbox_fetch() 
functions. If you are running lwIP in a single threaded environment, the 
latter of those functions can be implemented as a simple "wait for n 
milliseconds" function. Look in src/arch/6502/sys_arch.c for an example of 
such an implementation.

It is also quite possible to run without using the sys_timeout() feature at 
all, and just call the timer functions at the correct time. I think this is 
how Florian's Win32 port works (right Florian?).

/adam
-- 
Adam Dunkels <address@hidden>
http://www.sics.se/~adam
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