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/******************************** -*- C -*- ****************************
*
* System specific implementation module.
*
* This module contains implementations of various operating system
* specific routines. This module should encapsulate most (or all)
* of these calls so that the rest of the code is portable.
*
*
***********************************************************************/
/***********************************************************************
*
* Copyright 1988,89,90,91,92,94,95,99,2000,2001,2002,2003,2006,2007,2008,2009
* Free Software Foundation, Inc.
* Written by Steve Byrne.
*
* This file is part of GNU Smalltalk.
*
* GNU Smalltalk is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2, or (at your option) any later
* version.
*
* Linking GNU Smalltalk statically or dynamically with other modules is
* making a combined work based on GNU Smalltalk. Thus, the terms and
* conditions of the GNU General Public License cover the whole
* combination.
*
* In addition, as a special exception, the Free Software Foundation
* give you permission to combine GNU Smalltalk with free software
* programs or libraries that are released under the GNU LGPL and with
* independent programs running under the GNU Smalltalk virtual machine.
*
* You may copy and distribute such a system following the terms of the
* GNU GPL for GNU Smalltalk and the licenses of the other code
* concerned, provided that you include the source code of that other
* code when and as the GNU GPL requires distribution of source code.
*
* Note that people who make modified versions of GNU Smalltalk are not
* obligated to grant this special exception for their modified
* versions; it is their choice whether to do so. The GNU General
* Public License gives permission to release a modified version without
* this exception; this exception also makes it possible to release a
* modified version which carries forward this exception.
*
* GNU Smalltalk 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 General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* GNU Smalltalk; see the file COPYING. If not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
***********************************************************************/
#include "gstpriv.h"
#ifdef HAVE_SYS_TIMES_H
# include <sys/times.h>
#endif
#ifdef HAVE_SYS_TIMEB_H
#include <sys/timeb.h>
#endif
#ifdef WIN32
# define WIN32_LEAN_AND_MEAN /* avoid including junk */
# include <windows.h>
#endif
uint64_t
_gst_get_milli_time (void)
{
static long frequency = 0, frequencyH;
long milli;
LARGE_INTEGER counter;
if (!frequency)
{
QueryPerformanceFrequency (&counter);
/* frequencyH = 1000 * 2^32 / frequency */
frequency = counter.LowPart;
frequencyH = MulDiv (1000 * (1 << 16), (1 << 16), counter.LowPart);
}
QueryPerformanceCounter (&counter);
/* milli = (high * 2^32 + low) * 1000 / freq =
high * (1000 * 2^32 / freq) + (low * 1000 / freq) =
(high * frequencyH) + (low / 4) * 4000 / freq)
Dividing and multiplying counter.LowPart by 4 is needed because
MulDiv accepts signed integers but counter.LowPart is unsigned. */
milli = counter.HighPart * frequencyH;
milli += MulDiv (counter.LowPart >> 2, 4000, frequency);
return milli;
}
char *
_gst_current_time_zone_name (void)
{
char *zone;
long bias = _gst_current_time_zone_bias () / 60;
TIME_ZONE_INFORMATION tzi;
LPCWSTR name;
static char buffer[32];
GetTimeZoneInformation (&tzi);
zone = buffer;
name = (bias == (tzi.Bias + tzi.StandardBias))
? tzi.StandardName : tzi.DaylightName;
WideCharToMultiByte (CP_ACP, 0, name, lstrlenW (name), zone, 32, NULL, NULL);
return xstrdup (zone);
}
void
_gst_usleep (int us)
{
Sleep (us / 1000);
}
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