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https://github.com/mpv-player/mpv
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c6166ff448
This avoids trouble if another mpv instance is initialized in the same process. Since timeBeginPeriod/timeEndPeriod are hereby not easily matched anymore, use an atexit() handler to call timeEndPeriod, so that we can be sure these calls are matched, even if we allow multiple initializations later when introducing the client API.
58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
/*
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* precise timer routines for Windows
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*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <windows.h>
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#include <sys/time.h>
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#include <mmsystem.h>
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#include <stdlib.h>
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#include "timer.h"
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void mp_sleep_us(int64_t us)
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{
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if (us < 0)
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return;
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// Sleep(0) won't sleep for one clocktick as the unix usleep
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// instead it will only make the thread ready
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// it may take some time until it actually starts to run again
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if (us < 1000)
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us = 1000;
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Sleep(us / 1000);
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}
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uint64_t mp_raw_time_us(void)
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{
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struct timeval tv;
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gettimeofday(&tv,NULL);
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return tv.tv_sec * 1000000LL + tv.tv_usec;
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}
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static void restore_timer(void)
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{
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// The MSDN documents that begin/end "must" be matched. This satisfies
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// this requirement.
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timeEndPeriod(1);
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}
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void mp_raw_time_init(void)
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{
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timeBeginPeriod(1); // request 1ms timer resolution
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atexit(restore_timer);
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}
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