59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <Winsock2.h>
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typedef union {
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unsigned __int64 tm; // time in 100 nanoseconds interval
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FILETIME ft;
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} FT;
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int gettimeofday(struct timeval *tp, struct timezone *tz) {
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if (tp == NULL) {
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return 0;
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}
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// UTC time
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FT ft;
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ZeroMemory(&ft, sizeof(ft));
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GetSystemTimeAsFileTime(&ft.ft);
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// to microseconds
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ft.tm /= 10;
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// convert to unix format
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// number of microseconds intervals between the 1st january 1601 and the 1st january 1970 (369 years + 89 leap days)
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const unsigned __int64 deltaEpoch = 11644473600000000ull;
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const unsigned __int64 microSecondsToSeconds = 1000000ull;
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tp->tv_usec = ft.tm % microSecondsToSeconds;
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tp->tv_sec = (ft.tm - deltaEpoch) / microSecondsToSeconds;
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// see man gettimeofday: timezone is deprecated and expected to be NULL
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(void)tz;
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return 0;
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}
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