[Spice-devel] [spice-gtk] gtk-session: prefer early check to agent connectivity

[Victor Toso]

From: Victor Toso <me at victortoso.com>

In case the agent is disconnected, we we don't need to create the
struct RunInfo, GMainLoop and add handlers to some signals.

Before this patch, spice_main_channel_clipboard_selection_request()
was always called even if agent was not connected, which would log
a critical message in agent_clipboard_request() and unnecessary call
to spice_channel_wakeup().

This patch also removes one goto and related cleanup label.

Signed-off-by: Victor Toso <victortoso at redhat.com>
---
 src/spice-gtk-session.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/src/spice-gtk-session.c b/src/spice-gtk-session.c
index 1ccae07..373d11e 100644
--- a/src/spice-gtk-session.c
+++ b/src/spice-gtk-session.c
@@ -728,6 +728,12 @@ static void clipboard_get(GtkClipboard *clipboard,
     g_return_if_fail(info < SPICE_N_ELEMENTS(atom2agent));
     g_return_if_fail(s->main != NULL);
 
+    g_object_get(s->main, "agent-connected", &agent_connected, NULL);
+    if (!agent_connected) {
+        SPICE_DEBUG("Request to guest failed as agent is not running");
+        return;
+    }
+
     ri.selection_data = selection_data;
     ri.info = info;
     ri.loop = g_main_loop_new(NULL, FALSE);
@@ -744,13 +750,6 @@ static void clipboard_get(GtkClipboard *clipboard,
     spice_main_channel_clipboard_selection_request(s->main, selection,
                                                    atom2agent[info].vdagent);
 
-
-    g_object_get(s->main, "agent-connected", &agent_connected, NULL);
-    if (!agent_connected) {
-        SPICE_DEBUG("canceled clipboard_get, before running loop");
-        goto cleanup;
-    }
-
     /* This is modeled on the implementation of gtk_dialog_run() even though
      * these thread functions are deprecated and appears to be needed to avoid
      * dead-lock from gtk_dialog_run().
@@ -761,7 +760,6 @@ static void clipboard_get(GtkClipboard *clipboard,
     gdk_threads_enter();
     G_GNUC_END_IGNORE_DEPRECATIONS
 
-cleanup:
     g_clear_pointer(&ri.loop, g_main_loop_unref);
     g_signal_handler_disconnect(s->main, clipboard_handler);
     g_signal_handler_disconnect(s->main, agent_handler);
-- 
2.20.1