compat/poll/poll.h

   1 /* Header for poll(2) emulation
   2    Contributed by Paolo Bonzini.
   3
   4    Copyright 2001, 2002, 2003, 2007, 2009, 2010 Free Software Foundation, Inc.
   5
   6    This file is part of gnulib.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2, or (at your option)
  11    any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License along
  19    with this program; if not, write to the Free Software Foundation,
  20    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  21
  22 #ifndef _GL_POLL_H
  23 #define _GL_POLL_H
  24
  25 /* fake a poll(2) environment */
  26 #define POLLIN      0x0001      /* any readable data available   */
  27 #define POLLPRI     0x0002      /* OOB/Urgent readable data      */
  28 #define POLLOUT     0x0004      /* file descriptor is writeable  */
  29 #define POLLERR     0x0008      /* some poll error occurred      */
  30 #define POLLHUP     0x0010      /* file descriptor was "hung up" */
  31 #define POLLNVAL    0x0020      /* requested events "invalid"    */
  32 #define POLLRDNORM  0x0040
  33 #define POLLRDBAND  0x0080
  34 #define POLLWRNORM  0x0100
  35 #define POLLWRBAND  0x0200
  36
  37 struct pollfd
  38 {
  39   int fd;                       /* which file descriptor to poll */
  40   short events;                 /* events we are interested in   */
  41   short revents;                /* events found on return        */
  42 };
  43
  44 typedef unsigned long nfds_t;
  45
  46 extern int poll (struct pollfd *pfd, nfds_t nfd, int timeout);
  47
  48 /* Define INFTIM only if doing so conforms to POSIX.  */
  49 #if !defined (_POSIX_C_SOURCE) && !defined (_XOPEN_SOURCE)
  50 #define INFTIM (-1)
  51 #endif
  52
  53 #endif /* _GL_POLL_H */