[gtk/matthiasc/for-master] gdk: Add a profiler mark for paint_idle

[Matthias Clasen <matthiasc src gnome org>]

commit cac4c93356a9e89675b69697290f6a0d260fea87
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Jan 22 21:27:59 2020 -0500

    gdk: Add a profiler mark for paint_idle
    
    This is the big frame clock function where most
    signals are emitted, and it can keep us away from
    the mainloop for a long time.

 gdk/gdkframeclockidle.c | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/gdk/gdkframeclockidle.c b/gdk/gdkframeclockidle.c
index 1d11ae4fe7..29cd57975f 100644
--- a/gdk/gdkframeclockidle.c
+++ b/gdk/gdkframeclockidle.c
@@ -317,6 +317,7 @@ gdk_frame_clock_paint_idle (void *data)
   GdkFrameClockIdlePrivate *priv = clock_idle->priv;
   gboolean skip_to_resume_events;
   GdkFrameTimings *timings = NULL;
+  gint64 before = g_get_monotonic_time ();
 
   priv->paint_idle_id = 0;
   priv->in_paint_idle = TRUE;
@@ -500,6 +501,9 @@ gdk_frame_clock_paint_idle (void *data)
   if (priv->freeze_count == 0)
     priv->sleep_serial = get_sleep_serial ();
 
+  if (gdk_profiler_is_running ())
+    gdk_profiler_add_mark (before * 1000, (g_get_monotonic_time () - before) * 1000, "frameclock", 
"paint_idle");
+
   return FALSE;
 }