mirror of
https://github.com/psycopg/psycopg2.git
synced 2024-11-23 09:23:43 +03:00
d52e9100d2
Added function 'timeradd'. Changed second parameter of 'gettimeofday' to void since not used in function and MSVC timezone definition is not a struct).
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/* win32_support.c - emulate some functions missing on Win32
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*
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* Copyright (C) 2003-2015 Federico Di Gregorio <fog@debian.org>
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*
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* This file is part of psycopg.
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*
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* psycopg2 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link this program with the OpenSSL library (or with
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* modified versions of OpenSSL that use the same license as OpenSSL),
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* and distribute linked combinations including the two.
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*
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* You must obey the GNU Lesser General Public License in all respects for
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* all of the code used other than OpenSSL.
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*
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* psycopg2 is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*/
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#define PSYCOPG_MODULE
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#include "psycopg/psycopg.h"
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#include "psycopg/win32_support.h"
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#ifdef _WIN32
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#ifndef __MINGW32__
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/* millisecond-precision port of gettimeofday for Win32, taken from
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src/port/gettimeofday.c in PostgreSQL core */
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/* FILETIME of Jan 1 1970 00:00:00. */
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static const unsigned __int64 epoch = ((unsigned __int64) 116444736000000000ULL);
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/*
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* timezone information is stored outside the kernel so tzp isn't used anymore.
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*
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* Note: this function is not for Win32 high precision timing purpose. See
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* elapsed_time().
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*/
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int
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gettimeofday(struct timeval * tp, void * tzp)
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{
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FILETIME file_time;
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SYSTEMTIME system_time;
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ULARGE_INTEGER ularge;
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GetSystemTime(&system_time);
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SystemTimeToFileTime(&system_time, &file_time);
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ularge.LowPart = file_time.dwLowDateTime;
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ularge.HighPart = file_time.dwHighDateTime;
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tp->tv_sec = (long) ((ularge.QuadPart - epoch) / 10000000L);
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tp->tv_usec = (long) (system_time.wMilliseconds * 1000);
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return 0;
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}
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/* timeradd missing on MS VC */
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void
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timeradd(struct timeval *a, struct timeval *b, struct timeval *c)
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{
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c->tv_sec = a->tv_sec + b->tv_sec;
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c->tv_usec = a->tv_usec + b->tv_usec;
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if(c->tv_usec >= 1000000L) {
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c->tv_usec -= 1000000L;
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c->tv_sec += 1;
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}
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}
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#endif /* !defined(__MINGW32__) */
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/* timersub is missing on mingw & MS VC */
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void
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timersub(struct timeval *a, struct timeval *b, struct timeval *c)
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{
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c->tv_sec = a->tv_sec - b->tv_sec;
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c->tv_usec = a->tv_usec - b->tv_usec;
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if (c->tv_usec < 0) {
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c->tv_usec += 1000000;
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c->tv_sec -= 1;
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}
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}
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#endif /* defined(_WIN32) */
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