1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
31 #endif /* HAVE_UNISTD_H */
34 #endif /* NATIVE_WIN32 */
38 #endif /* NATIVE_WIN32 */
40 typedef struct _GRealTimer GRealTimer;
47 #else /* !NATIVE_WIN32 */
50 #endif /* !NATIVE_WIN32 */
60 timer = g_new (GRealTimer, 1);
64 timer->start = GetTickCount ();
65 #else /* !NATIVE_WIN32 */
66 gettimeofday (&timer->start, NULL);
67 #endif /* !NATIVE_WIN32 */
69 return ((GTimer*) timer);
73 g_timer_destroy (GTimer *timer)
75 g_assert (timer != NULL);
81 g_timer_start (GTimer *timer)
85 g_assert (timer != NULL);
87 rtimer = (GRealTimer*) timer;
88 rtimer->active = TRUE;
91 rtimer->start = GetTickCount ();
92 #else /* !NATIVE_WIN32 */
93 gettimeofday (&rtimer->start, NULL);
94 #endif /* !NATIVE_WIN32 */
98 g_timer_stop (GTimer *timer)
102 g_assert (timer != NULL);
104 rtimer = (GRealTimer*) timer;
105 rtimer->active = FALSE;
108 rtimer->end = GetTickCount ();
109 #else /* !NATIVE_WIN32 */
110 gettimeofday (&rtimer->end, NULL);
111 #endif /* !NATIVE_WIN32 */
115 g_timer_reset (GTimer *timer)
119 g_assert (timer != NULL);
121 rtimer = (GRealTimer*) timer;
124 rtimer->start = GetTickCount ();
125 #else /* !NATIVE_WIN32 */
126 gettimeofday (&rtimer->start, NULL);
127 #endif /* !NATIVE_WIN32 */
131 g_timer_elapsed (GTimer *timer,
132 gulong *microseconds)
137 struct timeval elapsed;
138 #endif /* NATIVE_WIN32 */
140 g_return_val_if_fail (timer != NULL, 0);
142 rtimer = (GRealTimer*) timer;
146 rtimer->end = GetTickCount ();
148 /* Check for wraparound, which happens every 49.7 days.
149 * No, Win95 machines probably are never running for that long,
150 * but NT machines are.
152 if (rtimer->end < rtimer->start)
153 total = (UINT_MAX - (rtimer->start - rtimer->end)) / 1000.0;
155 total = (rtimer->end - rtimer->start) / 1000.0;
159 if (rtimer->end < rtimer->start)
161 ((UINT_MAX - (rtimer->start - rtimer->end)) % 1000) * 1000;
164 ((rtimer->end - rtimer->start) % 1000) * 1000;
166 #else /* !NATIVE_WIN32 */
168 gettimeofday (&rtimer->end, NULL);
170 if (rtimer->start.tv_usec > rtimer->end.tv_usec)
172 rtimer->end.tv_usec += 1000000;
173 rtimer->end.tv_sec--;
176 elapsed.tv_usec = rtimer->end.tv_usec - rtimer->start.tv_usec;
177 elapsed.tv_sec = rtimer->end.tv_sec - rtimer->start.tv_sec;
179 total = elapsed.tv_sec + ((gdouble) elapsed.tv_usec / 1e6);
182 *microseconds = elapsed.tv_usec;
183 #endif /* !NATIVE_WIN32 */