120 lines
2.4 KiB
C
120 lines
2.4 KiB
C
/* GLIB - Library of useful routines for C programming
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <sys/time.h>
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#include <unistd.h>
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#include "glib.h"
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typedef struct _GRealTimer GRealTimer;
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struct _GRealTimer
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{
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struct timeval start;
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struct timeval end;
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gint active;
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};
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GTimer*
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g_timer_new ()
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{
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GRealTimer *timer;
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timer = g_new (GRealTimer, 1);
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timer->active = TRUE;
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gettimeofday (&timer->start, NULL);
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return ((GTimer*) timer);
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}
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void
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g_timer_destroy (GTimer *timer)
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{
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g_assert (timer != NULL);
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g_free (timer);
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}
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void
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g_timer_start (GTimer *timer)
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{
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GRealTimer *rtimer;
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g_assert (timer != NULL);
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rtimer = (GRealTimer*) timer;
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gettimeofday (&rtimer->start, NULL);
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rtimer->active = 1;
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}
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void
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g_timer_stop (GTimer *timer)
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{
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GRealTimer *rtimer;
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g_assert (timer != NULL);
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rtimer = (GRealTimer*) timer;
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gettimeofday (&rtimer->end, NULL);
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rtimer->active = 0;
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}
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void
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g_timer_reset (GTimer *timer)
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{
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GRealTimer *rtimer;
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g_assert (timer != NULL);
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rtimer = (GRealTimer*) timer;
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gettimeofday (&rtimer->start, NULL);
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}
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gdouble
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g_timer_elapsed (GTimer *timer,
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gulong *microseconds)
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{
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GRealTimer *rtimer;
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struct timeval elapsed;
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gdouble total;
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g_assert (timer != NULL);
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rtimer = (GRealTimer*) timer;
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if (rtimer->active)
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gettimeofday (&rtimer->end, NULL);
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if (rtimer->start.tv_usec > rtimer->end.tv_usec)
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{
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rtimer->end.tv_usec += 1000000;
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rtimer->end.tv_sec--;
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}
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elapsed.tv_usec = rtimer->end.tv_usec - rtimer->start.tv_usec;
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elapsed.tv_sec = rtimer->end.tv_sec - rtimer->start.tv_sec;
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total = elapsed.tv_sec + ((gdouble) elapsed.tv_usec / 1e6);
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if (microseconds)
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*microseconds = elapsed.tv_usec;
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return total;
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}
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