New directory with the start of a framework for testing performance in

2005-07-26  Federico Mena Quintero  <federico@ximian.com>

	* perf/: New directory with the start of a framework for testing
	performance in GTK+.

	* Makefile.am (SRC_SUBDIRS): Added the perf directory.

	* configure.in (AC_OUTPUT): Generate perf/Makefile.

1 files changed, 134 insertions, 0 deletions

diff --git a/perf/timers.c b/perf/timers.c
new file mode 100644
index 0000000000..042c66b217
--- /dev/null
+++ b/perf/timers.c
@@ -0,0 +1,134 @@
+/* Utility functions for timing widgets
+ *
+ * Authors:
+ *   Federico Mena-Quintero <federico@novell.com>
+ *
+ * To measure how long it takes to fully map and expose a toplevel window, we
+ * use a trick which Owen Taylor described on IRC one day:
+ *
+ *   1. Start a timer.
+ *   2. Call gtk_widget_show_all() on the toplevel window.
+ *   3. In the expose_event handler of the window, queue an idle handler with
+ *      G_PRIORITY_HIGH.
+ *   4. In the idle handler, change a property on the toplevel window.
+ *   5. In the property_notify_event handler, stop the timer.
+ */
+
+#include <string.h>
+#include <glib.h>
+#include <gtk/gtkmain.h>
+#include "timers.h"
+
+struct timer_closure
+{
+  GTimer *timer;
+  GtkWidget *widget;
+  TimerReportFunc report_func;
+  gpointer user_data;
+};
+
+static gboolean
+widget_property_notify_event_cb (GtkWidget *widget, GdkEventProperty *event, gpointer data)
+{
+  struct timer_closure *closure;
+  gdouble elapsed;
+
+  closure = data;
+
+  if (event->atom != gdk_atom_intern ("window_property_change", FALSE))
+    return FALSE;
+
+  /* Finish timing map/expose */
+
+  elapsed = g_timer_elapsed (closure->timer, NULL);
+  (* closure->report_func) (TIMER_REPORT_WIDGET_SHOW, elapsed, closure->user_data);
+
+  /* Time destruction */
+  
+  g_timer_reset (closure->timer);
+  gtk_widget_destroy (widget);
+  elapsed = g_timer_elapsed (closure->timer, NULL);
+  (* closure->report_func) (TIMER_REPORT_WIDGET_DESTRUCTION, elapsed, closure->user_data);
+
+  gtk_main_quit (); /* This will get us back to the end of timer_time_widget() */
+  return TRUE;
+}
+
+static gboolean
+idle_after_expose_cb (gpointer data)
+{
+  struct timer_closure *closure;
+
+  closure = data;
+
+  gdk_property_change (closure->widget->window,
+		       gdk_atom_intern ("window_property_change", FALSE),
+		       gdk_atom_intern ("STRING", FALSE),
+		       8,
+		       GDK_PROP_MODE_REPLACE,
+		       "hello",
+		       strlen ("hello"));
+
+  return FALSE;
+}
+
+static gboolean
+widget_expose_event_cb (GtkWidget *widget, GdkEventExpose *event, gpointer data)
+{
+  struct timer_closure *closure;
+
+  closure = data;
+
+  g_idle_add_full (G_PRIORITY_HIGH, idle_after_expose_cb, closure, NULL);
+  return FALSE;
+}
+
+static void
+instrument_widget (GtkWidget *widget,
+		   struct timer_closure *closure)
+{
+  g_signal_connect (widget, "expose-event",
+		    G_CALLBACK (widget_expose_event_cb), closure);
+
+  gtk_widget_add_events (widget, GDK_PROPERTY_CHANGE_MASK);
+  g_signal_connect (widget, "property-notify-event",
+		    G_CALLBACK (widget_property_notify_event_cb), closure);
+}
+
+void
+timer_time_widget (TimerWidgetCreateFunc create_func,
+		   TimerReportFunc       report_func,
+		   gpointer              user_data)
+{
+  GTimer *timer;
+  GtkWidget *widget;
+  gdouble elapsed;
+  struct timer_closure closure;
+
+  g_assert (create_func != NULL);
+  g_assert (report_func != NULL);
+
+  /* Time creation */
+
+  timer = g_timer_new ();
+  widget = (* create_func) (user_data);
+  g_assert (widget != NULL);
+  g_assert (!GTK_WIDGET_VISIBLE (widget) && !GTK_WIDGET_MAPPED (widget));
+  elapsed = g_timer_elapsed (timer, NULL);
+
+  (* report_func) (TIMER_REPORT_WIDGET_CREATION, elapsed, user_data);
+
+  /* Start timing map/expose */
+
+  closure.timer = timer;
+  closure.widget = widget;
+  closure.report_func = report_func;
+  closure.user_data = user_data;
+  instrument_widget (widget, &closure);
+
+  g_timer_reset (timer);
+  gtk_widget_show_all (widget);
+  gtk_main ();
+
+  /* Expose time and destruction time get recorded in widget_property_notify_event_cb() */
+}