Re: [lwip-users] Non-blocking I/O in lwip

[Simon Goldschmidt]

Francesco Sacchi <address@hidden> wrote:
> We see that non-blocking sending has been implemented in lwip-1.4, and 
> here is our question: if we upgrade will this issue be solved?
> 
> In other words, if I open a socket in non-blocking mode, I suppose that 
> the lwip_send() will return an error in case it would block 
> (EWOULDBLOCK), but then, if I close the socket, will the memory 
> allocated be freed correctly?

Yes, 1.4.0 should work for you: if no buffers are available, a non-blocking 
send returns EWOULDBLOCK (which a blocking send waits indefinitly for memory to 
become available).

However, you might want to control the amount of data buffered on the listening 
connection so that the out-of-memory condition doesn't happen at all?

Simon
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