[lwip-members] [bug #45433] Endless loop in tcp_slowtmr

[Sylvain Rochet]

Update of bug #45433 (project lwip):

                  Status:                    None => Need Info              

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Follow-up Comment #1:

As usual, it looks like a broken port or usage which do not follow lwIP
threading model.

Summary:

- Do *NOT* call anything in interrupt context, nothing, never, never,
use your OS semaphore signaling to an Ethernet/serial/… RX thread
- memp_* functions are thread-safe if SYS_LIGHTWEIGHT_PROT is
set, and again, thread safe does not mean it is interrupt safe, especially
if your hardware does nested interrupts
- Do *NOT* call any function from the RAW API outside lwIP thread
- Use Netconn or Socket API in others threads, but keep in mind you
should not share a Netconn/Socket control block between threads, (or use
proper locking if you really have to, of course).


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