[lwip-devel] [task #7490] Add return value to sys_mbox_post

[Jonathan Larmour]

Follow-up Comment #18, task #7490 (project lwip):

I agree for blocking versus non-blocking, although arguably tcpip_input may
as well free the pbuf itself.

tcpip_callback is indeed a bit of a dilemma. Personally I'd use it more from
interrupt context than otherwise, but it's possible to think of situations
when it needs to be reliable i.e. blocking. We could make two versions, but to
be honest, I think it's best just to make it non-blocking with error code if
blocked, and let the caller decide. Worst case they just loop polling it, or
loop sleeping and polling it. 

If we find people wanting a blocking version in future it's easy to add.


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