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/* 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
}
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