Re: [lwip-users] How to close tcp_thread

[tes_wzm]

Cause I need to close TCP task when I don't need it. I wanna use it's stack
for other task.
Now I write a route to release mem used by tcp task when I kill TCP task.
'cause not well test, it works not very well


address@hidden wrote:
> 
> 
> tes_wzm wrote:
>> I use lwip+ppp to send data to my tcp server.
>> When sth occured, I want to close tcp thread. How can I do it? If I kill
>> this thread through OS, it will leak some memory which use to create
>> mailbox
>> and sem. Is't some routes to release this memory?
> 
> Shutting down lwIP is not supported as it is meant to run forever. If you
> really need this, you must implement it on your own. Depending on why you
> need to stop the thread, you could also just make sure you don't have any
> other tasks running (netconn/socket API) and use tcpip_callback to call a
> custom function that doesn't return (i.e. block on a semaphore) until the
> thread should run again.
> 
> The reason we haven't implemented graceful shutdown of the stack is that
> it is not needed often and has negative impact (code size, testing, etc.)
> on the rest of the stack even when not used.
> 
> Simon
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