Method getCurrentGmtTimeStamp

src/common/TimeZoneUtil.cpp:808–878

}

ISC_TIMESTAMP_TZ TimeZoneUtil::getCurrentGmtTimeStamp()
{
	NoThrowTimeStamp now;

	// ASF: This comment is copied from NoThrowTimeStamp::getCurrentTimeStamp.
	// NS: We round generated timestamps to whole millisecond.
	// Not many applications can deal with fractional milliseconds properly and
	// we do not use high resolution timers either so actual time granularity
	// is going to to be somewhere in range between 1 ms (like on UNIX/Risc)
	// and 53 ms (such as Win9X)

	int milliseconds;

#ifdef WIN_NT
	SYSTEMTIME stUtc;
	GetSystemTime(&stUtc);
	milliseconds = stUtc.wMilliseconds;
#else
	time_t seconds; // UTC time

#ifdef HAVE_GETTIMEOFDAY
	struct timeval tp;
	GETTIMEOFDAY(&tp);
	seconds = tp.tv_sec;
	milliseconds = tp.tv_usec / 1000;
#else
	struct timeb time_buffer;
	ftime(&time_buffer);
	seconds = time_buffer.time;
	milliseconds = time_buffer.millitm;
#endif
#endif // WIN_NT

	const int fractions = milliseconds * ISC_TIME_SECONDS_PRECISION / 1000;

#ifdef WIN_NT
	// Manually convert SYSTEMTIME to "struct tm" used below

	struct tm times, *ptimes = ×

	times.tm_sec = stUtc.wSecond;			// seconds after the minute - [0,59]
	times.tm_min = stUtc.wMinute;			// minutes after the hour - [0,59]
	times.tm_hour = stUtc.wHour;			// hours since midnight - [0,23]
	times.tm_mday = stUtc.wDay;				// day of the month - [1,31]
	times.tm_mon = stUtc.wMonth - 1;		// months since January - [0,11]
	times.tm_year = stUtc.wYear - 1900;		// years since 1900
	times.tm_wday = stUtc.wDayOfWeek;		// days since Sunday - [0,6]

	// --- no used for encoding below
	times.tm_yday = 0;						// days since January 1 - [0,365]
	times.tm_isdst = -1;					// daylight savings time flag
#else
#ifdef HAVE_GMTIME_R
	struct tm times, *ptimes = ×
	if (!gmtime_r(&seconds, &times))
		system_call_failed::raise("gmtime_r");
#else
	struct tm *ptimes = gmtime(&seconds);