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Re: [lwip-users] How to close tcp_thread
From: |
Simon Goldschmidt |
Subject: |
Re: [lwip-users] How to close tcp_thread |
Date: |
Mon, 29 Mar 2010 10:21:54 +0200 |
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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