vlc/compat/timespec_get.c
Steve Lhomme 416ba0eca6 compat: provide a win32 specific version of timespec_get
On mingw64 clock_gettime() is defined in winpthread which we don't want to use.

This implementation is based on the winpthread internal processing.

(cherry picked from commit f0a7bc050f)
Signed-off-by: Steve Lhomme <robux4@ycbcr.xyz>
2020-06-19 08:11:45 +02:00

84 lines
2.3 KiB
C

/*****************************************************************************
* timespec_get.c: C11 timespec_get() replacement
*****************************************************************************
* Copyright © 2015 Rémi Denis-Courmont
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef _WIN32
#include <windows.h>
int timespec_get(struct timespec *ts, int base)
{
FILETIME ft;
ULARGE_INTEGER s;
ULONGLONG t;
if (base != TIME_UTC)
return 0;
GetSystemTimeAsFileTime(&ft);
s.LowPart = ft.dwLowDateTime;
s.HighPart = ft.dwHighDateTime;
t = s.QuadPart - 116444736000000000ULL;
ts->tv_sec = t / 10000000;
ts->tv_nsec = ((int) (t % 10000000)) * 100;
return base;
}
#else /* !_WIN32 */
#include <time.h>
#include <unistd.h> /* _POSIX_TIMERS */
#ifndef _POSIX_TIMERS
#define _POSIX_TIMERS (-1)
#endif
#if (_POSIX_TIMERS <= 0)
# include <sys/time.h> /* gettimeofday() */
#endif
int timespec_get(struct timespec *ts, int base)
{
switch (base)
{
case TIME_UTC:
#if (_POSIX_TIMERS >= 0)
if (clock_gettime(CLOCK_REALTIME, ts) == 0)
break;
#endif
#if (_POSIX_TIMERS <= 0)
{
struct timeval tv;
if (gettimeofday(&tv, NULL) == 0)
{
ts->tv_sec = tv.tv_sec;
ts->tv_nsec = tv.tv_usec * 1000;
break;
}
}
#endif
/* fall through */
default:
return 0;
}
return base;
}
#endif /* !_WIN32 */