mirror of
https://github.com/mpv-player/mpv
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f544bcf105
clock_gettime is implemented in winpthreads, so it's unavailable when mpv is compiled with its internal pthreads implementation. This makes mp_raw_time_us fall back to gettimeofday(), which can cause an assert failure in mp_add_timeout() when the system clock is changed. Use QueryPerformanceCounter instead. The clock_gettime(CLOCK_MONOTONIC) implementation in winpthreads uses QueryPerformanceCounter anyway, so there shouldn't be any change in behaviour.
57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/*
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* precise timer routines for Windows
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*
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* This file is part of mpv.
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*
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* mpv 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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* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
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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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static LARGE_INTEGER perf_freq;
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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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LARGE_INTEGER perf_count;
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QueryPerformanceCounter(&perf_count);
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// Convert QPC units (1/perf_freq seconds) to microseconds. This will work
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// without overflow because the QPC value is guaranteed not to roll-over
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// within 100 years, so perf_freq must be less than 2.9*10^9.
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return perf_count.QuadPart / perf_freq.QuadPart * 1000000 +
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perf_count.QuadPart % perf_freq.QuadPart * 1000000 / perf_freq.QuadPart;
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}
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void mp_raw_time_init(void)
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{
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QueryPerformanceFrequency(&perf_freq);
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timeBeginPeriod(1); // request 1ms timer resolution
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}
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