/* systemtime.c -- Portable system time source
 * This file is part of redshift-ng.
 * 
 * redshift-ng 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 3 of the License, or
 * (at your option) any later version.
 * 
 * redshift-ng 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 redshift-ng.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * Copyright (c) 2010-2014  Jon Lund Steffensen <jonlst@gmail.com>
 * Copyright (c) 2025       Mattias Andrée <m@maandree.se>
 */
#include "common.h"


double
systemtime_get_time(void)
{
#if defined(WINDOWS)
	FILETIME now;
	ULARGE_INTEGER i;
	GetSystemTimeAsFileTime(&now);
	i.LowPart = now.dwLowDateTime;
	i.HighPart = now.dwHighDateTime;
	/* FILETIME is tenths of microseconds since 1601-01-01 UTC */
	return (i.QuadPart / 10000000.0) - 11644473600.0;

#elif defined(_POSIX_TIMERS)
	struct timespec now;
	if (clock_gettime(CLOCK_REALTIME, &now))
		eprintf("clock_gettime CLOCK_REALTIME:");
	return now.tv_sec + (now.tv_nsec / 1000000000.0);

#else
	struct timeval now;
	if (gettimeofday(&now, NULL))
		eprintf("gettimeofday:");
	return = now.tv_sec + (now.tv_usec / 1000000.0);
#endif
}


void
systemtime_msleep(unsigned int msecs)
{
#ifdef WINDOWS
	Sleep(msecs);
#else
	struct timespec sleep;
	sleep.tv_sec = (time_t)(msecs / 1000U);
	sleep.tv_nsec = (long)(msecs % 1000U) * 1000000L;
	nanosleep(&sleep, NULL);
#endif
}