2007-10-19 Nagappan A <anagappan@novell.com>

[mono.git] / eglib / src / gtimer.c

diff --git a/eglib/src/gtimer.c b/eglib/src/gtimer.c
index fdc470f796d2aff11cea90314278a31d59f61219..c6a3296218683bc65711cf0e8e20be1ec38c48f5 100644 (file)
--- a/eglib/src/gtimer.c
+++ b/eglib/src/gtimer.c
@@ -26,11 +26,20 @@
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 #include <glib.h>
+#ifdef _MSC_VER
+#include <windows.h>
+#else
 #include <sys/time.h>
+#endif
 
 struct _GTimer {
+#ifdef _MSC_VER
+       guint64 start;
+       guint64 stop;
+#else
        struct timeval start;
        struct timeval stop;
+#endif
 };
 
 GTimer *g_timer_new (void)
@@ -53,23 +62,51 @@ void
 g_timer_start (GTimer *timer)
 {
        g_return_if_fail (timer != NULL);
+#ifdef _MSC_VER
+       QueryPerformanceCounter ((LARGE_INTEGER*)&timer->start);
+#else
        gettimeofday (&timer->start, NULL);
        memset (&timer->stop, 0, sizeof (struct timeval));
+#endif
+
 }
 
 void
 g_timer_stop (GTimer *timer)
 {
        g_return_if_fail (timer != NULL);
+#ifdef _MSC_VER
+       QueryPerformanceCounter ((LARGE_INTEGER*)&timer->stop);
+#else
        gettimeofday (&timer->stop, NULL);
+#endif
 }
 
 gdouble
 g_timer_elapsed (GTimer *timer, gulong *microseconds)
 {
+#ifdef _MSC_VER
+       guint64 stop;
+       guint64 freq;
+       gdouble seconds;
+       if (timer->stop == 0) {
+               QueryPerformanceCounter ((LARGE_INTEGER*)&stop);
+       }
+       else {
+               stop = timer->stop;
+       }
+
+       QueryPerformanceFrequency ((LARGE_INTEGER*)&freq);
+       seconds = 1.0 * (stop - timer->start) / freq;
+
+       if (microseconds) {
+               *microseconds = (gulong)(1000000.0 * (stop - timer->start) / freq);
+       }
+       return seconds;
+#else
        struct timeval tv;
        gulong seconds;
-       gulong usec;
+       long usec;
        gdouble result;
 
        g_return_val_if_fail (timer != NULL, 0.0);
@@ -80,7 +117,7 @@ g_timer_elapsed (GTimer *timer, gulong *microseconds)
                tv = timer->stop;
        }
 
-       usec = tv.tv_usec - timer->start.tv_usec;
+       usec = (tv.tv_usec) - (timer->start.tv_usec);
        seconds = tv.tv_sec - timer->start.tv_sec;
        if (microseconds) {
                if (usec < 0) {
@@ -91,5 +128,7 @@ g_timer_elapsed (GTimer *timer, gulong *microseconds)
        }
        result = seconds * 1000000 + usec;
        return (result / 1000000);
+#endif
 }
 
+