From: Willy Tarreau <w@1wt.eu>
Date: Mon, 25 Sep 2017 14:17:25 +0000 (+0200)
Subject: MINOR: h2: small function to know when the mux is busy
X-Git-Tag: v1.8-rc1~55
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5b5e68741ae9b29017b95fb2c0ae72589a108da7;p=thirdparty%2Fhaproxy.git

MINOR: h2: small function to know when the mux is busy

A mux is busy when any stream id >= 0 is currently being handled
and the current stream's id doesn't match. When no stream is
involved (ie: demuxer), stream 0 is considered. This will be
necessary to know when it's possible to send frames.
---

diff --git a/src/mux_h2.c b/src/mux_h2.c
index ea4f90f7a8..370494d5bc 100644
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -361,6 +361,18 @@ static inline int h2s_id(const struct h2s *h2s)
 	return h2s ? h2s->id : 0;
 }
 
+/* returns true of the mux is currently busy as seen from stream <h2s> */
+static inline int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
+{
+	if (h2c->msi < 0)
+		return 0;
+
+	if (h2c->msi == h2s_id(h2s))
+		return 0;
+
+	return 1;
+}
+
 
 /*********************************************************/
 /* functions below are I/O callbacks from the connection */