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b9ef2b41db
Wed Feb 24 00:08:42 CST 1999 Shawn T. Amundson <amundson@gtk.org> * *.[ch]: inserted additional note to look for ChangeLog and AUTHORS file for a log of modifications.
194 lines
4.2 KiB
C
194 lines
4.2 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
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GLib Team and others 1997-1999. See the AUTHORS
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* file for a list of people on the GLib Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GLib at ftp://ftp.gtk.org/pub/gtk/.
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*/
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/*
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* MT safe
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "glib.h"
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#ifndef NATIVE_WIN32
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#include <sys/time.h>
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#endif /* NATIVE_WIN32 */
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#ifdef NATIVE_WIN32
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#include <windows.h>
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#endif /* NATIVE_WIN32 */
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typedef struct _GRealTimer GRealTimer;
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struct _GRealTimer
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{
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#ifdef NATIVE_WIN32
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DWORD start;
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DWORD end;
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#else /* !NATIVE_WIN32 */
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struct timeval start;
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struct timeval end;
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#endif /* !NATIVE_WIN32 */
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guint active : 1;
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};
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GTimer*
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g_timer_new (void)
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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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#ifdef NATIVE_WIN32
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timer->start = GetTickCount ();
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#else /* !NATIVE_WIN32 */
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gettimeofday (&timer->start, NULL);
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#endif /* !NATIVE_WIN32 */
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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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rtimer->active = TRUE;
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#ifdef NATIVE_WIN32
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rtimer->start = GetTickCount ();
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#else /* !NATIVE_WIN32 */
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gettimeofday (&rtimer->start, NULL);
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#endif /* !NATIVE_WIN32 */
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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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rtimer->active = FALSE;
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#ifdef NATIVE_WIN32
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rtimer->end = GetTickCount ();
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#else /* !NATIVE_WIN32 */
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gettimeofday (&rtimer->end, NULL);
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#endif /* !NATIVE_WIN32 */
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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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#ifdef NATIVE_WIN32
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rtimer->start = GetTickCount ();
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#else /* !NATIVE_WIN32 */
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gettimeofday (&rtimer->start, NULL);
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#endif /* !NATIVE_WIN32 */
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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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gdouble total;
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#ifndef NATIVE_WIN32
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struct timeval elapsed;
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#endif /* NATIVE_WIN32 */
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g_return_val_if_fail (timer != NULL, 0);
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rtimer = (GRealTimer*) timer;
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#ifdef NATIVE_WIN32
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if (rtimer->active)
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rtimer->end = GetTickCount ();
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/* Check for wraparound, which happens every 49.7 days.
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* No, Win95 machines probably are never running for that long,
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* but NT machines are.
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*/
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if (rtimer->end < rtimer->start)
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total = (UINT_MAX - (rtimer->start - rtimer->end)) / 1000.0;
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else
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total = (rtimer->end - rtimer->start) / 1000.0;
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if (microseconds)
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{
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if (rtimer->end < rtimer->start)
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*microseconds =
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((UINT_MAX - (rtimer->start - rtimer->end)) % 1000) * 1000;
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else
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*microseconds =
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((rtimer->end - rtimer->start) % 1000) * 1000;
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}
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#else /* !NATIVE_WIN32 */
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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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#endif /* !NATIVE_WIN32 */
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return total;
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}
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