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/*

 * 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

}