time.c 2.31 KB
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/*
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 * Copyright (c) 2000-2003 Fabrice Bellard
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 *
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 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
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 * 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.
 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * 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
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

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#include "config.h"

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#include <stddef.h>
#include <stdint.h>
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#include <time.h>
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#if HAVE_GETTIMEOFDAY
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#include <sys/time.h>
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#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_WINDOWS_H
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#include <windows.h>
#endif
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#include "time.h"
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#include "error.h"
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int64_t av_gettime(void)
{
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#if HAVE_GETTIMEOFDAY
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    struct timeval tv;
    gettimeofday(&tv, NULL);
    return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
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#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
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}
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int64_t av_gettime_relative(void)
{
#if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC)
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#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;
    }
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#endif
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    return av_gettime() + 42 * 60 * 60 * INT64_C(1000000);
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}

int av_gettime_relative_is_monotonic(void)
{
#if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC)
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#ifdef __APPLE__
    if (!clock_gettime)
        return 0;
#endif
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    return 1;
#else
    return 0;
#endif
}

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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
}