114 lines
3.1 KiB
C++
114 lines
3.1 KiB
C++
/**
|
|
* \file timestamp.cxx
|
|
* Provides a class for managing a timestamp (seconds & milliseconds.)
|
|
*/
|
|
|
|
// Written by Curtis Olson, started December 1998.
|
|
//
|
|
// Copyright (C) 1998 Curtis L. Olson - http://www.flightgear.org/~curt
|
|
//
|
|
// This program is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU General Public License as
|
|
// published by the Free Software Foundation; either version 2 of the
|
|
// License, or (at your option) any later version.
|
|
//
|
|
// This program 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
|
|
// General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
//
|
|
// $Id$
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <simgear_config.h>
|
|
#endif
|
|
|
|
#include <simgear/compiler.h>
|
|
|
|
#include <ctime>
|
|
|
|
#ifdef HAVE_SYS_TIMEB_H
|
|
# include <sys/timeb.h> // for ftime() and struct timeb
|
|
#endif
|
|
#ifdef HAVE_UNISTD_H
|
|
# include <unistd.h> // for gettimeofday() and the _POSIX_TIMERS define
|
|
#endif
|
|
#ifdef HAVE_SYS_TIME_H
|
|
# include <sys/time.h> // for get/setitimer, gettimeofday, struct timeval
|
|
#endif
|
|
|
|
#if defined(_POSIX_TIMERS) && (0 < _POSIX_TIMERS)
|
|
# include <time.h>
|
|
# include <errno.h>
|
|
#endif
|
|
|
|
#ifdef WIN32
|
|
# include <windows.h>
|
|
# if defined( __CYGWIN__ ) || defined( __CYGWIN32__ )
|
|
# define NEAR /* */
|
|
# define FAR /* */
|
|
# endif
|
|
# include <mmsystem.h>
|
|
#endif
|
|
|
|
#include "timestamp.hxx"
|
|
|
|
void SGTimeStamp::stamp() {
|
|
#ifdef _WIN32
|
|
unsigned int t;
|
|
t = timeGetTime();
|
|
_sec = t / 1000;
|
|
_nsec = ( t - ( _sec * 1000 ) ) * 1000 * 1000;
|
|
#elif defined(_POSIX_TIMERS) && (0 < _POSIX_TIMERS)
|
|
struct timespec ts;
|
|
#if defined(_POSIX_MONOTONIC_CLOCK)
|
|
static clockid_t clockid = CLOCK_MONOTONIC;
|
|
static bool firstTime = true;
|
|
if (firstTime) {
|
|
firstTime = false;
|
|
// For the first time test if the monotonic clock is available.
|
|
// If so use this if not use the realtime clock.
|
|
if (-1 == clock_gettime(clockid, &ts) && errno == EINVAL)
|
|
clockid = CLOCK_REALTIME;
|
|
}
|
|
clock_gettime(clockid, &ts);
|
|
#else
|
|
clock_gettime(CLOCK_REALTIME, &ts);
|
|
#endif
|
|
_sec = ts.tv_sec;
|
|
_nsec = ts.tv_nsec;
|
|
#elif defined( HAVE_GETTIMEOFDAY )
|
|
struct timeval current;
|
|
struct timezone tz;
|
|
// sg_timestamp currtime;
|
|
gettimeofday(¤t, &tz);
|
|
_sec = current.tv_sec;
|
|
_nsec = current.tv_usec * 1000;
|
|
#elif defined( HAVE_GETLOCALTIME )
|
|
SYSTEMTIME current;
|
|
GetLocalTime(¤t);
|
|
_sec = current.wSecond;
|
|
_nsec = current.wMilliseconds * 1000 * 1000;
|
|
#elif defined( HAVE_FTIME )
|
|
struct timeb current;
|
|
ftime(¤t);
|
|
_sec = current.time;
|
|
_nsec = current.millitm * 1000 * 1000;
|
|
#else
|
|
# error Port me
|
|
#endif
|
|
}
|
|
|
|
int SGTimeStamp::elapsedMSec() const
|
|
{
|
|
SGTimeStamp now;
|
|
now.stamp();
|
|
|
|
return static_cast<int>((now - *this).toMSecs());
|
|
}
|