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Update doc

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Tatsuhiro Tsujikawa 2016-03-21 13:08:53 +09:00
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commit 3d04fe2a87
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doc/programmers-guide.rst
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@ -57,6 +57,23 @@ doubt, use `nghttp2_session_mem_send()` since it is simpler. But
`nghttp2_session_send()` might be easier to use if the output buffer
an application has is fixed sized.
In general, an application should call `nghttp2_session_mem_send()`
when it gets input from underlying connection. Since there is great
chance to get something pushed into transmission queue while the call
of `nghttp2_session_mem_send()`, it is recommended to call
`nghttp2_session_mem_recv()` after `nghttp2_session_mem_send()`.
There is a question when we are safe to close HTTP/2 session without
waiting for the closure of underlying connection. We offer 2 API
calls for this: `nghttp2_session_want_read()` and
`nghttp2_session_want_write()`. If they both return 0, application
can destroy :type:`nghttp2_session`, and then close the underlying
connection. But make sure that the buffered output has been
transmitted to the peer before closing the connection when
`nghttp2_session_mem_send()` is used, since
`nghttp2_session_want_write()` does not take into account the
transmission of the buffered data outside of :type:`nghttp2_session`.
Includes
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