[lwip-devel] [bug #20021] conn->sem is only signaled one-way

[Kieran Mansley]

Follow-up Comment #9, bug #20021 (project lwip):

> Alternatively, you can move the current send buffer test into 
> the tcp/ip thread (so the caller thread effectively always
> waits, and its up to the tcpip thread to whether it resumes). 
> We had already talked about this in fact, because the call to 
> tcp_sndbuf is a race condition already.

Might this cause a new set of problems where the tcpip_thread gets blocked
waiting for memory to do operation A, while operation B that could otherwise
go ahead isn't able to get into the tcpip_thread?  The benefits might
outweigh this downside though.  Probably do in fact if there's an existing
race that would also be solved.



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