/*

 * 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"

#include "mathematics.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)

#ifdef __APPLE__

    if (&clock_gettime)

#endif

    {

        struct timespec ts;

        clock_gettime(CLOCK_MONOTONIC, &ts);

        return (int64_t)ts.tv_sec * 1000000 + ts.tv_nsec / 1000;

    }

#elif defined(_WIN32)

    LARGE_INTEGER freq;

    LARGE_INTEGER counter;

    QueryPerformanceFrequency(&freq);

    QueryPerformanceCounter(&counter);

    return av_rescale(counter.QuadPart, 1000000, freq.QuadPart);

#endif

    return av_gettime() + 42 * 60 * 60 * INT64_C(1000000);

}

int av_gettime_relative_is_monotonic(void)

{

#if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC)

#ifdef __APPLE__

    if (!&clock_gettime)

        return 0;

#endif

    return 1;

#elif defined(_WIN32)

    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

}