libs/port/usleep.c

   1 /*
   2  * usleep function
   3  *
   4  * Copyright 1996 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <errno.h>
  25
  26 #ifndef HAVE_USLEEP
  27 int usleep (unsigned int useconds)
  28 {
  29 #if defined(__EMX__)
  30     DosSleep(useconds);
  31     return 0;
  32 #elif defined(__BEOS__)
  33     return snooze(useconds);
  34 #elif defined(HAVE_SELECT)
  35     struct timeval delay;
  36
  37     delay.tv_sec = useconds / 1000000;
  38     delay.tv_usec = useconds % 1000000;
  39
  40     select( 0, 0, 0, 0, &delay );
  41     return 0;
  42 #else /* defined(__EMX__) || defined(__BEOS__) || defined(HAVE_SELECT) */
  43     errno = ENOSYS;
  44     return -1;
  45 #endif /* defined(__EMX__) || defined(__BEOS__) || defined(HAVE_SELECT) */
  46 }
  47 #endif /* HAVE_USLEEP */