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glibc  2.9
poll.c
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00001 /* poll file descriptors.  Hurd version.
00002    Copyright (C) 1998, 2001, 2002 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <sys/poll.h>
00021 #include <sys/time.h>
00022 #include <hurd.h>
00023 #include <hurd/fd.h>
00024 
00025 /* Poll the file descriptors described by the NFDS structures starting at
00026    FDS.  If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for
00027    an event to occur; if TIMEOUT is -1, block until an event occurs.
00028    Returns the number of file descriptors with events, zero if timed out,
00029    or -1 for errors.  */
00030 
00031 int
00032 __poll (fds, nfds, timeout)
00033      struct pollfd *fds;
00034      nfds_t nfds;
00035      int timeout;
00036 {
00037   struct timespec ts, *to;
00038 
00039   if (timeout < 0)
00040     to = NULL;
00041   else
00042     {
00043       ts.tv_sec = timeout / 1000;
00044       ts.tv_nsec = (timeout % 1000) * 1000000;
00045       to = &ts;
00046     }
00047 
00048   return _hurd_select (nfds, fds, NULL, NULL, NULL, to, NULL);
00049 }
00050 libc_hidden_def (__poll)
00051 weak_alias (__poll, poll)