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/**************************************************************************\
*
* This file is part of the Coin 3D visualization library.
* Copyright (C) by Kongsberg Oil & Gas Technologies.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* ("GPL") version 2 as published by the Free Software Foundation.
* See the file LICENSE.GPL at the root directory of this source
* distribution for additional information about the GNU GPL.
*
* For using Coin with software that can not be combined with the GNU
* GPL, and for taking advantage of the additional benefits of our
* support services, please contact Kongsberg Oil & Gas Technologies
* about acquiring a Coin Professional Edition License.
*
* See http://www.coin3d.org/ for more information.
*
* Kongsberg Oil & Gas Technologies, Bygdoy Alle 5, 0257 Oslo, NORWAY.
* http://www.sim.no/ sales@sim.no coin-support@coin3d.org
*
\**************************************************************************/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /* HAVE_CONFIG_H */
#ifdef HAVE_WINDOWS_H
#include <windows.h>
#endif /* HAVE_WINDOWS_H */
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h> /* gettimeofday() */
#endif /* HAVE_SYS_TIME_H */
#ifdef HAVE_TIME_H
#include <ctime>
#endif /* HAVE_TIME_H */
/* On Mac OS X / Darwin, timeb.h uses time_t from time.h, so the order
of these two includes needs to be preserved. */
#ifdef HAVE_SYS_TIMEB_H
#include <sys/timeb.h> /* struct _timeb or struct timeb */
#endif /* HAVE_SYS_TIMEB_H */
#ifdef HAVE_UNISTD_H
#include <unistd.h> /* gettimeofday() */
#endif /* HAVE_UNISTD_H */
#include <cassert>
#include <Inventor/C/base/time.h>
#include <Inventor/C/errors/debugerror.h>
#include "coindefs.h"
/* ********************************************************************** */
#ifdef HAVE_QUERYPERFORMANCECOUNTER
static int highperf_available = -1;
static double highperf_start = -1;
static double highperf_tick = -1;
#endif /* HAVE_QUERYPERFORMANCECOUNTER */
/* The Win32 QueryPerformanceCounter() strategy is based on code
submitted by Jan Peciva (aka PCJohn). */
static SbBool
cc_internal_queryperformancecounter(cc_time * COIN_UNUSED_ARG(t))
{
#ifdef HAVE_QUERYPERFORMANCECOUNTER
if (highperf_available == -1) {
LARGE_INTEGER frequency;
highperf_available = (QueryPerformanceFrequency(&frequency) != 0);
if (highperf_available) {
highperf_tick = 1.0 / frequency.QuadPart;
{
time_t tt = time(NULL);
LARGE_INTEGER counter;
(void)QueryPerformanceCounter(&counter);
highperf_start = tt - ((double)counter.QuadPart * highperf_tick);
}
}
}
if (highperf_available) {
LARGE_INTEGER counter;
BOOL b = QueryPerformanceCounter(&counter);
assert(b && "QueryPerformanceCounter() failed even though QueryPerformanceFrequency() worked");
*t = (double)counter.QuadPart * highperf_tick + highperf_start;
return TRUE;
}
return FALSE;
#else /* !HAVE_QUERYPERFORMANCECOUNTER */
return FALSE;
#endif /* !HAVE_QUERYPERFORMANCECOUNTER */
}
static SbBool
cc_internal_gettimeofday(cc_time * t)
{
#ifdef HAVE_GETTIMEOFDAY
struct timeval tv;
int result = gettimeofday(&tv, NULL);
if (COIN_DEBUG && (result < 0)) {
cc_debugerror_postwarning("SbTime_gettimeofday",
"Something went wrong (invalid timezone "
"setting?). Result is undefined.");
}
*t = tv.tv_sec;
*t += static_cast<double>((tv.tv_usec))/1000000.0;
return TRUE;
#else /* !HAVE_GETTIMEOFDAY */
return FALSE;
#endif /* !HAVE_GETTIMEOFDAY */
}
static SbBool
cc_internal_ftime(cc_time * t)
{
#ifdef HAVE__FTIME
struct _timeb timebuffer;
_ftime(&timebuffer);
/* FIXME: should use timezone field of struct _timeb aswell. 20011023 mortene. */
*t = (double)timebuffer.time + (double)timebuffer.millitm / 1000.0;
return TRUE;
#elif defined(HAVE_FTIME)
struct timeb timebuffer;
/* FIXME: should use timezone field of struct _timeb aswell. 20011023 mortene. */
ftime(&timebuffer);
*t = static_cast<double>(timebuffer.time) + static_cast<double>(timebuffer.millitm) / 1000.0;
return TRUE;
#else /* HAVE_FTIME */
return FALSE;
#endif /* !HAVE_FTIME */
}
/* ********************************************************************** */
/*!
Returns current time in seconds.
FIXME: Specify call overhead and resolution.
*/
cc_time
cc_time_gettimeofday(void)
{
cc_time t = 0.0;
if (cc_internal_queryperformancecounter(&t)) { return t; }
if (cc_internal_gettimeofday(&t)) { return t; }
if (cc_internal_ftime(&t)) { return t; }
/* FIXME: write better debug output. 20011218 mortene. */
cc_debugerror_post("cc_time_gettimeofday", "unable to find current time");
return 0.0;
}
/* ********************************************************************** */
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