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/* 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., 675 Mass Ave, Cambridge, MA 02139, 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 ()
{
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;
}
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