1feff82129
GetSystemTimeAsFileTime() has 16ms precision. GetSystemTimePreciseAsFileTime() has <1ns precision but is only available on Windows 8 or later. This change dynamically loads GetSystemTimePreciseAsFileTime() if it is available. Change-Id: Ib9c616c01948384e6b256ac9b6023f1e39673613
95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
/*
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* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <config.h>
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#include "roken.h"
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#ifndef HAVE_GETTIMEOFDAY
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#ifdef _WIN32
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typedef BOOL (WINAPI *LPFN_GETSYSTEMTIME) (LPFILETIME);
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static LPFN_GETSYSTEMTIME lpGetSystemTime = NULL;
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ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
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gettimeofday (struct timeval *tp, void *ignore)
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{
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FILETIME ft;
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ULARGE_INTEGER li;
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ULONGLONG ull;
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if (lpGetSystemTime == NULL) {
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HANDLE h1;
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LPFN_GETSYSTEMTIME fn;
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h1 = GetModuleHandle(TEXT("kernel32.dll")); /* no refcount increase */
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fn = (LPFN_GETSYSTEMTIME)GetProcAddress(h1,
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"GetSystemTimePreciseAsFileTime");
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if (fn == NULL)
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fn = (LPFN_GETSYSTEMTIME)GetProcAddress(h1,
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"GetSystemTimeAsFileTime");
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lpGetSystemTime = fn;
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}
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lpGetSystemTime(&ft);
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li.LowPart = ft.dwLowDateTime;
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li.HighPart = ft.dwHighDateTime;
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ull = li.QuadPart;
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ull -= 116444736000000000i64;
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ull /= 10i64; /* ull is now in microseconds */
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tp->tv_usec = (ull % 1000000i64);
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tp->tv_sec = (ull / 1000000i64);
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return 0;
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}
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#else
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/*
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* Simple gettimeofday that only returns seconds.
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*/
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ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
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gettimeofday (struct timeval *tp, void *ignore)
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{
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time_t t;
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t = time(NULL);
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tp->tv_sec = (long) t;
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tp->tv_usec = 0;
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return 0;
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}
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#endif /* !_WIN32 */
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#endif
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