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/*
* Copyright (C) 2004-2005 by Objective Systems, Inc.
*
* This software is furnished under an open source license and may be
* used and copied only in accordance with the terms of this license.
* The text of the license may generally be found in the root
* directory of this installation in the LICENSE.txt file. It
* can also be viewed online at the following URL:
*
* http://www.obj-sys.com/open/license.html
*
* Any redistributions of this file including modified versions must
* maintain this copyright notice.
*
*****************************************************************************/
#include "ooCommon.h"
#include "ooDateTime.h"
#if defined(_WIN32) || defined(_MSC_VER) || defined(__MINGW32__)
#ifndef __MINGW32__
#include <SYS\TIMEB.H>
int gettimeofday (struct timeval *tv, struct timezone *tz)
{
struct _timeb currSysTime;
_ftime(&currSysTime);
tv->tv_sec = currSysTime.time;
tv->tv_usec = currSysTime.millitm * 1000;
return 0;
}
#else
/* Mingw specific logic..probably works with regular winders
* too, but cannot test. --Ben
*/
#define uint64 unsigned long long
#define uint32 unsigned long
static uint64 calcEpocOffset() {
SYSTEMTIME st;
FILETIME ft;
memset(&st, 0, sizeof(st));
memset(&ft, 0, sizeof(ft));
st.wYear = 1970;
st.wMonth = 1;
st.wDayOfWeek = 0;
st.wDay = 1;
st.wHour = 0;
st.wMinute = 0;
st.wSecond = 0;
st.wMilliseconds = 0;
if (!SystemTimeToFileTime(&st, &ft)) {
//cout << "ERROR: SystemTimeToFileTime failed, err: "
// << GetLastError() << endl;
}
uint64 t = ft.dwHighDateTime;
t = t << 32;
t |= ft.dwLowDateTime;
return t;
}
// Gets high resolution by spinning up to 15ms. Don't call this often!!!
static uint64 getRawCurMsSpin() {
FILETIME tm;
uint64 t_now;
static uint64 epocOffset = 0;
static int do_once = 1;
if (do_once) {
epocOffset = calcEpocOffset();
do_once = 0;
}
GetSystemTimeAsFileTime(&tm);
uint64 t_start = tm.dwHighDateTime;
t_start = t_start << 32;
t_start |= tm.dwLowDateTime;
while (1) {
GetSystemTimeAsFileTime(&tm);
t_now = tm.dwHighDateTime;
t_now = t_now << 32;
t_now |= tm.dwLowDateTime;
if (t_now != t_start) {
// Hit a boundary...as accurate as we are going to get.
break;
}
}
t_now -= epocOffset;
// t is in 100ns units, convert to usecs
t_now = t_now / 10000; //msecs
return t_now;
}
static uint64 baselineMs = 0;
static uint32 tickBaseline = 0;
int gettimeofday(struct timeval* tv, void* null) {
// Get baseline time, in seconds.
if (baselineMs == 0) {
baselineMs = getRawCurMsSpin();
tickBaseline = timeGetTime();
}
uint32 curTicks = timeGetTime();
if (curTicks < tickBaseline) {
// Wrap!
baselineMs = getRawCurMsSpin();
tickBaseline = timeGetTime();
}
uint64 now_ms = (baselineMs + (curTicks - tickBaseline));
*tv = oo_ms_to_tv(now_ms);
return 0;
};
/* Correctly synched with the 'real' time/date clock, but only exact to
* about 15ms. Set foo to non NULL if you want to recalculate the
*/
uint64 getCurMsFromClock() {
// This has resolution of only about 15ms
FILETIME tm;
// The Windows epoc is January 1, 1601 (UTC).
static uint64 offset = 0;
static int do_once = 1;
if (do_once) {
offset = calcEpocOffset();
do_once = 0;
}
GetSystemTimeAsFileTime(&tm);
uint64 t = tm.dwHighDateTime;
t = t << 32;
t |= tm.dwLowDateTime;
/*cout << "file-time: " << t << " offset: " << offset
<< " normalized: " << (t - offset) << " hi: "
<< tm.dwHighDateTime << " lo: " << tm.dwLowDateTime
<< " calc-offset:\n" << calcEpocOffset() << "\n\n";
*/
t -= offset;
// t is in 100ns units, convert to ms
t = t / 10000;
return t;
}
#endif
#endif
int ooGetTimeOfDay (struct timeval *tv, struct timezone *tz)
{
return gettimeofday (tv, tz);
}
long ooGetTimeDiff(struct timeval *tv1, struct timeval *tv2)
{
return ( ((tv2->tv_sec-tv1->tv_sec)*1000) +
((tv2->tv_usec-tv1->tv_usec)/1000) );
}
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