sysdeps/unix/sysv/linux/mips/bits/poll.h

   1 /* Copyright (C) 1997, 2001, 2006, 2009 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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _SYS_POLL_H
  19 # error "Never use <bits/poll.h> directly; include <sys/poll.h> instead."
  20 #endif
  21
  22 /* Event types that can be polled for.  These bits may be set in `events'
  23    to indicate the interesting event types; they will appear in `revents'
  24    to indicate the status of the file descriptor.  */
  25 #define POLLIN          0x001           /* There is data to read.  */
  26 #define POLLPRI         0x002           /* There is urgent data to read.  */
  27 #define POLLOUT         0x004           /* Writing now will not block.  */
  28
  29 #if defined __USE_XOPEN || defined __USE_XOPEN2K8
  30 /* These values are defined in XPG4.2.  */
  31 # define POLLRDNORM     0x040           /* Normal data may be read.  */
  32 # define POLLRDBAND     0x080           /* Priority data may be read.  */
  33 # define POLLWRNORM     POLLOUT         /* Writing now will not block.  */
  34 # define POLLWRBAND     0x100           /* Priority data may be written.  */
  35 #endif
  36
  37 #ifdef __USE_GNU
  38 /* These are extensions for Linux.  */
  39 # define POLLMSG        0x400
  40 # define POLLREMOVE     0x1000
  41 # define POLLRDHUP      0x2000
  42 #endif
  43
  44 /* Event types always implicitly polled for.  These bits need not be set in
  45    `events', but they will appear in `revents' to indicate the status of
  46    the file descriptor.  */
  47 #define POLLERR         0x008           /* Error condition.  */
  48 #define POLLHUP         0x010           /* Hung up.  */
  49 #define POLLNVAL        0x020           /* Invalid polling request.  */