#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "glib.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifndef NATIVE_WIN32
#include <sys/time.h>
#endif
#ifdef NATIVE_WIN32
#include <windows.h>
#endif
typedef struct _GRealTimer GRealTimer;
struct _GRealTimer
{
#ifdef NATIVE_WIN32
DWORD start;
DWORD end;
#else
struct timeval start;
struct timeval end;
#endif
guint active : 1;
};
GTimer*
g_timer_new (void)
{
GRealTimer *timer;
timer = g_new (GRealTimer, 1);
timer->active = TRUE;
#ifdef NATIVE_WIN32
timer->start = GetTickCount ();
#else
gettimeofday (&timer->start, NULL);
#endif
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 NATIVE_WIN32
rtimer->start = GetTickCount ();
#else
gettimeofday (&rtimer->start, NULL);
#endif
}
void
g_timer_stop (GTimer *timer)
{
GRealTimer *rtimer;
g_return_if_fail (timer != NULL);
rtimer = (GRealTimer*) timer;
rtimer->active = FALSE;
#ifdef NATIVE_WIN32
rtimer->end = GetTickCount ();
#else
gettimeofday (&rtimer->end, NULL);
#endif
}
void
g_timer_reset (GTimer *timer)
{
GRealTimer *rtimer;
g_return_if_fail (timer != NULL);
rtimer = (GRealTimer*) timer;
#ifdef NATIVE_WIN32
rtimer->start = GetTickCount ();
#else
gettimeofday (&rtimer->start, NULL);
#endif
}
gdouble
g_timer_elapsed (GTimer *timer,
gulong *microseconds)
{
GRealTimer *rtimer;
gdouble total;
#ifndef NATIVE_WIN32
struct timeval elapsed;
#endif
g_return_val_if_fail (timer != NULL, 0);
rtimer = (GRealTimer*) timer;
#ifdef NATIVE_WIN32
if (rtimer->active)
rtimer->end = GetTickCount ();
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
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 (total < 0)
{
total = 0;
if (microseconds)
*microseconds = 0;
}
else
if (microseconds)
*microseconds = elapsed.tv_usec;
#endif
return total;
}