/*
* libieee1284 - IEEE 1284 library
* Copyright (C) 2001 Tim Waugh <twaugh@redhat.com>
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _MSC_VER
#include <sys/time.h>
#endif
#ifdef __unix__
#include <unistd.h>
#endif
#if defined __MINGW32__ || defined _MSC_VER
#include <sys/timeb.h>
#endif
#include "delay.h"
void udelay(unsigned long usec)
{
#if !(defined __MINGW32__ || defined _MSC_VER)
struct timeval now, deadline;
gettimeofday(&deadline, NULL);
deadline.tv_usec += usec;
deadline.tv_sec += deadline.tv_usec / 1000000;
deadline.tv_usec %= 1000000;
do {
gettimeofday(&now, NULL);
} while ((now.tv_sec < deadline.tv_sec) ||
(now.tv_sec == deadline.tv_sec &&
now.tv_usec < deadline.tv_usec));
#else
/* MinGW has no gettimeofday(). ftime() seems to be the best alternative as I
* don't know of any standard Windows function with microsecond accuracy. I
* should have a look at the Cygwin source code... - dbjh */
struct timeb tb;
long int now, deadline;
ftime(&tb);
deadline = tb.time * 1000 + tb.millitm + usec / 1000;
do {
ftime(&tb);
now = tb.time * 1000 + tb.millitm;
} while (now < deadline);
#endif
}