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 ea4f90f7a85e526f9cdd4d10a1a837aa5b38d5c6..370494d5bc7b0046d2303e9adbede7ec80a6e3c1 100644 (file)
--- 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 */