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doc: clarify flow control behaviour for nghttp2_session_send() 

The previous wording implied that if send_callback doesn't return
NGHTTP2_ERR_WOULDBLOCK, this function would always send all
submitted requests / data. This is not the case, since flow control can
cause some data to remain queued until WINDOW_UPDATE is received.
This commit is contained in:
Tomas Krizek 2020-06-17 17:18:04 +02:00
parent abe80e371e
commit f76ac19627
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1 changed files with 2 additions and 1 deletions
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lib/includes/nghttp2/nghttp2.h
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@ -2853,7 +2853,8 @@ NGHTTP2_EXTERN void nghttp2_session_del(nghttp2_session *session);
* outbound queue and sends it to the remote peer. It does this as * outbound queue and sends it to the remote peer. It does this as
* many as possible until the user callback * many as possible until the user callback
* :type:`nghttp2_send_callback` returns * :type:`nghttp2_send_callback` returns
* :enum:`NGHTTP2_ERR_WOULDBLOCK` or the outbound queue becomes empty. * :enum:`NGHTTP2_ERR_WOULDBLOCK`, the outbound queue becomes empty
* or remote window size becomes depleted due to flow control.
* This function calls several callback functions which are passed * This function calls several callback functions which are passed
* when initializing the |session|. Here is the simple time chart * when initializing the |session|. Here is the simple time chart
* which tells when each callback is invoked: * which tells when each callback is invoked: