| /* Copyright (C) 1997-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _SYS_POLL_H |
| # error "Never use <bits/poll.h> directly; include <sys/poll.h> instead." |
| #endif |
| |
| /* Event types that can be polled for. These bits may be set in `events' |
| to indicate the interesting event types; they will appear in `revents' |
| to indicate the status of the file descriptor. */ |
| #define POLLIN 01 /* There is data to read. */ |
| #define POLLPRI 02 /* There is urgent data to read. */ |
| #define POLLOUT 04 /* Writing now will not block. */ |
| |
| #if defined __USE_XOPEN || defined __USE_XOPEN2K8 |
| /* These values are defined in XPG4.2 and later. */ |
| # define POLLRDNORM POLLIN /* Normal data may be read. */ |
| # define POLLRDBAND POLLPRI /* Priority data may be read. */ |
| # define POLLWRNORM POLLOUT /* Writing now will not block. */ |
| # define POLLWRBAND POLLOUT /* Priority data may be written. */ |
| #endif |
| |
| /* Event types always implicitly polled for. These bits need not be set in |
| `events', but they will appear in `revents' to indicate the status of |
| the file descriptor. */ |
| #define POLLERR 010 /* Error condition. */ |
| #define POLLHUP 020 /* Hung up. */ |
| #define POLLNVAL 040 /* Invalid polling request. */ |
