Re: [lwip-users] LWIP infinite loop - system watchdog implementation

[address@hidden]

Piero 74 wrote:
> LWIP has its task (tcpip thread - i'm using socket), and i saw that 
> this task can block forever trought functions in sys_arch.c 
> sys_arch_sem_wait and sys_arch_mbox_fetch.
> I implemented these functions putting a macro functions inside a 
> infinite loop (execute if timeout parameter is 0).
Why don't you simply use sys_timeout to get your triggering function 
called periodically? It puts a callback on a list which is processed by 
sys_sem_wait() before calling sys_arch_sem_wait(). Normally, 
sys_arch_sem_wait() will never be called with infinite timeout from 
tcpip_thread, there are always timeouts running. Look at tcpip.c for 
examples how to use it.


Simon