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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 Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GLib Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GLib Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GLib at ftp://ftp.gtk.org/pub/gtk/.
*/
/*
* MT safe
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "glib.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
#ifndef G_OS_WIN32
#include <sys/time.h>
#endif /* G_OS_WIN32 */
#ifdef G_OS_WIN32
#include <windows.h>
#endif /* G_OS_WIN32 */
typedef struct _GRealTimer GRealTimer;
struct _GRealTimer
{
#ifdef G_OS_WIN32
DWORD start;
DWORD end;
#else /* !G_OS_WIN32 */
struct timeval start;
struct timeval end;
#endif /* !G_OS_WIN32 */
guint active : 1;
};
GTimer*
g_timer_new (void)
{
GRealTimer *timer;
timer = g_new (GRealTimer, 1);
timer->active = TRUE;
#ifdef G_OS_WIN32
timer->start = GetTickCount ();
#else /* !G_OS_WIN32 */
gettimeofday (&timer->start, NULL);
#endif /* !G_OS_WIN32 */
return ((GTimer*) timer);
}
void
g_timer_destroy (GTimer *timer)
{
g_return_if_fail (timer != NULL);
g_free (timer);
}
void
g_timer_start (GTimer *timer)
{
GRealTimer *rtimer;
g_return_if_fail (timer != NULL);
rtimer = (GRealTimer*) timer;
rtimer->active = TRUE;
#ifdef G_OS_WIN32
rtimer->start = GetTickCount ();
#else /* !G_OS_WIN32 */
gettimeofday (&rtimer->start, NULL);
#endif /* !G_OS_WIN32 */
}
void
g_timer_stop (GTimer *timer)
{
GRealTimer *rtimer;
g_return_if_fail (timer != NULL);
rtimer = (GRealTimer*) timer;
rtimer->active = FALSE;
#ifdef G_OS_WIN32
rtimer->end = GetTickCount ();
#else /* !G_OS_WIN32 */
gettimeofday (&rtimer->end, NULL);
#endif /* !G_OS_WIN32 */
}
void
g_timer_reset (GTimer *timer)
{
GRealTimer *rtimer;
g_return_if_fail (timer != NULL);
rtimer = (GRealTimer*) timer;
#ifdef G_OS_WIN32
rtimer->start = GetTickCount ();
#else /* !G_OS_WIN32 */
gettimeofday (&rtimer->start, NULL);
#endif /* !G_OS_WIN32 */
}
gdouble
g_timer_elapsed (GTimer *timer,
gulong *microseconds)
{
GRealTimer *rtimer;
gdouble total;
#ifndef G_OS_WIN32
struct timeval elapsed;
#endif /* G_OS_WIN32 */
g_return_val_if_fail (timer != NULL, 0);
rtimer = (GRealTimer*) timer;
#ifdef G_OS_WIN32
if (rtimer->active)
rtimer->end = GetTickCount ();
/* Check for wraparound, which happens every 49.7 days.
* No, Win95 machines probably are never running for that long,
* but NT machines are.
*/
if (rtimer->end < rtimer->start)
total = (UINT_MAX - (rtimer->start - rtimer->end)) / 1000.0;
else
total = (rtimer->end - rtimer->start) / 1000.0;
if (microseconds)
{
if (rtimer->end < rtimer->start)
*microseconds =
((UINT_MAX - (rtimer->start - rtimer->end)) % 1000) * 1000;
else
*microseconds =
((rtimer->end - rtimer->start) % 1000) * 1000;
}
#else /* !G_OS_WIN32 */
if (rtimer->active)
gettimeofday (&rtimer->end, NULL);
if (rtimer->start.tv_usec > rtimer->end.tv_usec)
{
rtimer->end.tv_usec += G_USEC_PER_SEC;
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 (total < 0)
{
total = 0;
if (microseconds)
*microseconds = 0;
}
else if (microseconds)
*microseconds = elapsed.tv_usec;
#endif /* !G_OS_WIN32 */
return total;
}
void
g_usleep (gulong microseconds)
{
#ifdef G_OS_WIN32
Sleep (microseconds / 1000);
#else
if (g_thread_supported ())
{
static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
static GCond* cond = NULL;
GTimeVal end_time;
g_get_current_time (&end_time);
end_time.tv_sec += microseconds / G_USEC_PER_SEC;
end_time.tv_usec += microseconds % G_USEC_PER_SEC;
if (end_time.tv_usec >= G_USEC_PER_SEC)
{
end_time.tv_usec -= G_USEC_PER_SEC;
end_time.tv_sec += 1;
}
g_static_mutex_lock (&mutex);
if (!cond)
cond = g_cond_new ();
while (g_cond_timed_wait (cond, g_static_mutex_get_mutex (&mutex),
&end_time))
/* do nothing */;
g_static_mutex_unlock (&mutex);
}
else
{
struct timeval tv;
tv.tv_sec = microseconds / G_USEC_PER_SEC;
tv.tv_usec = microseconds % G_USEC_PER_SEC;
select(0, NULL, NULL, NULL, &tv);
}
#endif
}
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