Philip Withnall authored Jan 21, 2014 and Olivier Crête committed Jan 31, 2014

Add one new public function, nice_agent_send_messages_nonblocking(),
which replaces nice_agent_send_full(). This isn’t an API break, because
nice_agent_send_full() hasn’t been in a release yet. The new API allows
sending multiple messages in a single call, and supports vectors of
buffers to transmit the messages from.

The existing nice_agent_send() API has been left untouched, although
it’s a bit of a bugbear because it’s non-blocking and doesn’t fit with
the new *_nonblocking() naming scheme. Oh well.

This doesn’t bring any notable changes to the number of memcpy()s on the
critical path: it remains at zero for the common cases and common socket
types. It introduces the possibility for future work to eliminate some
memcpy()s in more complex socket types, like tcp-turn and tcp-bsd, but
these optimisations have not been made yet. FIXME comments have been
added.

This includes modifications to the test-send-recv unit test to cover the
new API.