/*

  * Copyright (c) 2000-2003 Fabrice Bellard

  *

  * This file is part of FFmpeg.
  *
  * FFmpeg 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.
  *

  * FFmpeg 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 FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 

 #include "config.h"
 

 #include <stddef.h>
 #include <stdint.h>

 #include <time.h>

 #if HAVE_GETTIMEOFDAY

 #include <sys/time.h>

 #endif
 #if HAVE_UNISTD_H
 #include <unistd.h>
 #endif
 #if HAVE_WINDOWS_H

 #include <windows.h>
 #endif

 #include "time.h"

 #include "error.h"

 
 int64_t av_gettime(void)
 {

 #if HAVE_GETTIMEOFDAY

     struct timeval tv;
     gettimeofday(&tv, NULL);
     return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;

 #elif HAVE_GETSYSTEMTIMEASFILETIME
     FILETIME ft;
     int64_t t;
     GetSystemTimeAsFileTime(&ft);
     t = (int64_t)ft.dwHighDateTime << 32 | ft.dwLowDateTime;
     return t / 10 - 11644473600000000; /* Jan 1, 1601 */
 #else
     return -1;
 #endif

 }

 int64_t av_gettime_relative(void)
 {
 #if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC)
     struct timespec ts;
     clock_gettime(CLOCK_MONOTONIC, &ts);
     return (int64_t)ts.tv_sec * 1000000 + ts.tv_nsec / 1000;
 #else
     return av_gettime();
 #endif
 }
 
 int av_gettime_relative_is_monotonic(void)
 {
 #if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC)
     return 1;
 #else
     return 0;
 #endif
 }
 

 int av_usleep(unsigned usec)
 {
 #if HAVE_NANOSLEEP
     struct timespec ts = { usec / 1000000, usec % 1000000 * 1000 };
     while (nanosleep(&ts, &ts) < 0 && errno == EINTR);
     return 0;
 #elif HAVE_USLEEP
     return usleep(usec);
 #elif HAVE_SLEEP
     Sleep(usec / 1000);
     return 0;
 #else
     return AVERROR(ENOSYS);
 #endif
 }