91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/* win32_support.c - emulate some functions missing on Win32
|
|
*
|
|
* Copyright (C) 2003-2019 Federico Di Gregorio <fog@debian.org>
|
|
* Copyright (C) 2020-2021 The Psycopg Team
|
|
*
|
|
* This file is part of psycopg.
|
|
*
|
|
* psycopg2 is free software: you can redistribute it and/or modify it
|
|
* under the terms of the GNU Lesser General Public License as published
|
|
* by the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* In addition, as a special exception, the copyright holders give
|
|
* permission to link this program with the OpenSSL library (or with
|
|
* modified versions of OpenSSL that use the same license as OpenSSL),
|
|
* and distribute linked combinations including the two.
|
|
*
|
|
* You must obey the GNU Lesser General Public License in all respects for
|
|
* all of the code used other than OpenSSL.
|
|
*
|
|
* psycopg2 is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
|
|
* License for more details.
|
|
*/
|
|
|
|
#define PSYCOPG_MODULE
|
|
#include "psycopg/psycopg.h"
|
|
|
|
#include "psycopg/win32_support.h"
|
|
|
|
#ifdef _WIN32
|
|
|
|
#ifndef __MINGW32__
|
|
/* millisecond-precision port of gettimeofday for Win32, taken from
|
|
src/port/gettimeofday.c in PostgreSQL core */
|
|
|
|
/* FILETIME of Jan 1 1970 00:00:00. */
|
|
static const unsigned __int64 epoch = ((unsigned __int64) 116444736000000000ULL);
|
|
|
|
/*
|
|
* timezone information is stored outside the kernel so tzp isn't used anymore.
|
|
*
|
|
* Note: this function is not for Win32 high precision timing purpose. See
|
|
* elapsed_time().
|
|
*/
|
|
int
|
|
gettimeofday(struct timeval * tp, void * tzp)
|
|
{
|
|
FILETIME file_time;
|
|
SYSTEMTIME system_time;
|
|
ULARGE_INTEGER ularge;
|
|
|
|
GetSystemTime(&system_time);
|
|
SystemTimeToFileTime(&system_time, &file_time);
|
|
ularge.LowPart = file_time.dwLowDateTime;
|
|
ularge.HighPart = file_time.dwHighDateTime;
|
|
|
|
tp->tv_sec = (long) ((ularge.QuadPart - epoch) / 10000000L);
|
|
tp->tv_usec = (long) (system_time.wMilliseconds * 1000);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* timeradd missing on MS VC */
|
|
void
|
|
timeradd(struct timeval *a, struct timeval *b, struct timeval *c)
|
|
{
|
|
c->tv_sec = a->tv_sec + b->tv_sec;
|
|
c->tv_usec = a->tv_usec + b->tv_usec;
|
|
if(c->tv_usec >= 1000000L) {
|
|
c->tv_usec -= 1000000L;
|
|
c->tv_sec += 1;
|
|
}
|
|
}
|
|
#endif /* !defined(__MINGW32__) */
|
|
|
|
/* timersub is missing on mingw & MS VC */
|
|
void
|
|
timersub(struct timeval *a, struct timeval *b, struct timeval *c)
|
|
{
|
|
c->tv_sec = a->tv_sec - b->tv_sec;
|
|
c->tv_usec = a->tv_usec - b->tv_usec;
|
|
if (c->tv_usec < 0) {
|
|
c->tv_usec += 1000000;
|
|
c->tv_sec -= 1;
|
|
}
|
|
}
|
|
|
|
#endif /* defined(_WIN32) */
|