[spice-server v2 5/6] reds-stream: Cache TCP socket 'no-delay' value

[Christophe Fergeau <cfergeau@xxxxxxxxxx>]

Rather than calling getsockopt when we need its value, we can cache it
as it can only be set through a call to reds_stream_set_no_delay()

Signed-off-by: Christophe Fergeau <cfergeau@xxxxxxxxxx>
---
 server/reds-stream.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/server/reds-stream.c b/server/reds-stream.c
index 1d815c1..66b1166 100644
--- a/server/reds-stream.c
+++ b/server/reds-stream.c
@@ -99,6 +99,7 @@ struct RedsStreamPrivate {
     ssize_t (*writev)(RedsStream *s, const struct iovec *iov, int iovcnt);
 
     RedsState *reds;
+    bool no_delay;
 };
 
 static ssize_t stream_write_cb(RedsStream *s, const void *buf, size_t size)
@@ -263,12 +264,17 @@ bool reds_stream_is_plain_unix(const RedsStream *s)
 
 bool reds_stream_set_no_delay(RedsStream *stream, bool no_delay)
 {
-    return red_socket_set_no_delay(stream->socket, no_delay);
+    bool success;
+    success = red_socket_set_no_delay(stream->socket, no_delay);
+    if (success) {
+        stream->priv->no_delay = !!no_delay;
+    }
+    return success;
 }
 
 int reds_stream_get_no_delay(RedsStream *stream)
 {
-    return red_socket_get_no_delay(stream->socket);
+    return stream->priv->no_delay;
 }
 
 int reds_stream_send_msgfd(RedsStream *stream, int fd)
@@ -372,7 +378,13 @@ void reds_stream_push_channel_event(RedsStream *s, int event)
 
 static void reds_stream_set_socket(RedsStream *stream, int socket)
 {
+    int no_delay;
     stream->socket = socket;
+    no_delay = red_socket_get_no_delay(socket);
+    if (no_delay != -1) {
+        stream->priv->no_delay = !!no_delay;
+    }
+
     /* deprecated fields. Filling them for backward compatibility */
     stream->priv->info->llen = sizeof(stream->priv->info->laddr);
     stream->priv->info->plen = sizeof(stream->priv->info->paddr);
-- 
2.9.3

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