Initial revision

1 files changed, 120 insertions, 0 deletions

diff --git a/gtimer.c b/gtimer.c
new file mode 100644
index 000000000..47946b39b
--- /dev/null
+++ b/gtimer.c
@@ -0,0 +1,120 @@
+/* GLIB - Library of useful routines for C programming
+ * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+#include <sys/time.h>
+#include <unistd.h>
+#include "glib.h"
+
+
+typedef struct _GRealTimer GRealTimer;
+
+struct _GRealTimer
+{
+  struct timeval start;
+  struct timeval end;
+  gint active;
+};
+
+
+GTimer*
+g_timer_new (void)
+{
+  GRealTimer *timer;
+
+  timer = g_new (GRealTimer, 1);
+  timer->active = TRUE;
+
+  gettimeofday (&timer->start, NULL);
+
+  return ((GTimer*) timer);
+}
+
+void
+g_timer_destroy (GTimer *timer)
+{
+  g_assert (timer != NULL);
+
+  g_free (timer);
+}
+
+void
+g_timer_start (GTimer *timer)
+{
+  GRealTimer *rtimer;
+
+  g_assert (timer != NULL);
+
+  rtimer = (GRealTimer*) timer;
+  gettimeofday (&rtimer->start, NULL);
+  rtimer->active = 1;
+}
+
+void
+g_timer_stop (GTimer *timer)
+{
+  GRealTimer *rtimer;
+
+  g_assert (timer != NULL);
+
+  rtimer = (GRealTimer*) timer;
+  gettimeofday (&rtimer->end, NULL);
+  rtimer->active = 0;
+}
+
+void
+g_timer_reset (GTimer *timer)
+{
+  GRealTimer *rtimer;
+
+  g_assert (timer != NULL);
+
+  rtimer = (GRealTimer*) timer;
+  gettimeofday (&rtimer->start, NULL);
+}
+
+gdouble
+g_timer_elapsed (GTimer *timer,
+		 gulong *microseconds)
+{
+  GRealTimer *rtimer;
+  struct timeval elapsed;
+  gdouble total;
+
+  g_assert (timer != NULL);
+
+  rtimer = (GRealTimer*) timer;
+
+  if (rtimer->active)
+    gettimeofday (&rtimer->end, NULL);
+
+  if (rtimer->start.tv_usec > rtimer->end.tv_usec)
+    {
+      rtimer->end.tv_usec += 1000000;
+      rtimer->end.tv_sec--;
+    }
+
+  elapsed.tv_usec = rtimer->end.tv_usec - rtimer->start.tv_usec;
+  elapsed.tv_sec = rtimer->end.tv_sec - rtimer->start.tv_sec;
+
+  total = elapsed.tv_sec + ((gdouble) elapsed.tv_usec / 1e6);
+
+  if (microseconds)
+    *microseconds = elapsed.tv_usec;
+
+  return total;
+}