sysdeps/mach/hurd/select.c

   1 /* Copyright (C) 1991,92,93,94,95,96,97,98,2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <sys/types.h>
  20 #include <sys/time.h>
  21 #include <hurd.h>
  22 #include <hurd/fd.h>
  23
  24 /* Check the first NFDS descriptors each in READFDS (if not NULL) for read
  25    readiness, in WRITEFDS (if not NULL) for write readiness, and in EXCEPTFDS
  26    (if not NULL) for exceptional conditions.  If TIMEOUT is not NULL, time out
  27    after waiting the interval specified therein.  Returns the number of ready
  28    descriptors, or -1 for errors.  */
  29 int
  30 __select (nfds, readfds, writefds, exceptfds, timeout)
  31      int nfds;
  32      fd_set *readfds;
  33      fd_set *writefds;
  34      fd_set *exceptfds;
  35      struct timeval *timeout;
  36 {
  37   struct timespec ts, *to;
  38
  39   if (timeout)
  40     {
  41       to = &ts;
  42       TIMEVAL_TO_TIMESPEC (timeout, to);
  43     }
  44   else
  45     to = NULL;
  46
  47   return _hurd_select (nfds, NULL, readfds, writefds, exceptfds, to, NULL);
  48 }
  49 libc_hidden_def (__select)
  50 weak_alias (__select, select)