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/*
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* libieee1284 - IEEE 1284 library
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* Copyright (C) 2001 Tim Waugh <twaugh@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _MSC_VER
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#include <sys/time.h>
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#endif
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#ifdef __unix__
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#include <unistd.h>
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#endif
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#if defined __MINGW32__ || defined _MSC_VER
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#include <sys/timeb.h>
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#endif
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#include "delay.h"
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void udelay(unsigned long usec)
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{
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#if !(defined __MINGW32__ || defined _MSC_VER)
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struct timeval now, deadline;
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gettimeofday(&deadline, NULL);
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deadline.tv_usec += usec;
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deadline.tv_sec += deadline.tv_usec / 1000000;
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deadline.tv_usec %= 1000000;
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do {
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gettimeofday(&now, NULL);
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} while ((now.tv_sec < deadline.tv_sec) ||
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(now.tv_sec == deadline.tv_sec &&
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now.tv_usec < deadline.tv_usec));
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#else
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/* MinGW has no gettimeofday(). ftime() seems to be the best alternative as I
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* don't know of any standard Windows function with microsecond accuracy. I
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* should have a look at the Cygwin source code... - dbjh */
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struct timeb tb;
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long int now, deadline;
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ftime(&tb);
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deadline = tb.time * 1000 + tb.millitm + usec / 1000;
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do {
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ftime(&tb);
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now = tb.time * 1000 + tb.millitm;
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} while (now < deadline);
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#endif
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}
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