mpv/osdep/timer-win2.c

/*
 * precise timer routines for Windows
 *
 * This file is part of mpv.
 *
 * mpv 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 2 of the License, or
 * (at your option) any later version.
 *
 * mpv 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 mpv.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <windows.h>
#include <sys/time.h>
#include <mmsystem.h>
#include <stdlib.h>
#include "timer.h"

void mp_sleep_us(int64_t us)
{
    if (us < 0)
        return;
    // Sleep(0) won't sleep for one clocktick as the unix usleep
    // instead it will only make the thread ready
    // it may take some time until it actually starts to run again
    if (us < 1000)
        us = 1000;
    Sleep(us / 1000);
}

#if defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0 && defined(CLOCK_MONOTONIC)
uint64_t mp_raw_time_us(void)
{
    struct timespec ts;
    if (clock_gettime(CLOCK_MONOTONIC, &ts))
        abort();
    return ts.tv_sec * 1000000LL + ts.tv_nsec / 1000;
}
#else
uint64_t mp_raw_time_us(void)
{
    struct timeval tv;
    gettimeofday(&tv,NULL);
    return tv.tv_sec * 1000000LL + tv.tv_usec;
}
#endif

void mp_raw_time_init(void)
{
    timeBeginPeriod(1); // request 1ms timer resolution
}