[lwip-devel] [task #6683] Document lwIPs thread safety requirements

[Frédéric Bernon]

Follow-up Comment #4, task #6683 (project lwip):

Agree with you Simon, but to do that, we have to : 

- use a critical section in api_msg_post
or
- use a semaphore (and not a mbox) to do the synchronize between
application-thread and tcpip_thread. This semaphore could be a local variable
(but it's not a good solution), or a semaphore based on a per thread base
(like sys_timeouts).
 

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