| /* Compatibility definitions for System V `poll' interface. |
| Copyright (C) 1994,1996-2001,2004,2005,2006 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #ifndef _SYS_POLL_H |
| #define _SYS_POLL_H 1 |
| |
| #include <features.h> |
| |
| /* Get the platform dependent bits of `poll'. */ |
| #include <bits/poll.h> |
| #ifdef __USE_GNU |
| /* Get the __sigset_t definition. */ |
| # include <bits/sigset.h> |
| /* Get the timespec definition. */ |
| # define __need_timespec |
| # include <time.h> |
| /* get NULL definition. */ |
| # include <stddef.h> |
| #endif |
| |
| |
| /* Type used for the number of file descriptors. */ |
| typedef unsigned long int nfds_t; |
| |
| /* Data structure describing a polling request. */ |
| struct pollfd |
| { |
| int fd; /* File descriptor to poll. */ |
| short int events; /* Types of events poller cares about. */ |
| short int revents; /* Types of events that actually occurred. */ |
| }; |
| |
| |
| __BEGIN_DECLS |
| |
| /* Poll the file descriptors described by the NFDS structures starting at |
| FDS. If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for |
| an event to occur; if TIMEOUT is -1, block until an event occurs. |
| Returns the number of file descriptors with events, zero if timed out, |
| or -1 for errors. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout); |
| |
| #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__ |
| /* Like poll, but before waiting the threads signal mask is replaced |
| with that specified in the fourth parameter. For better usability, |
| the timeout value is specified using a TIMESPEC object. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern int ppoll (struct pollfd *__fds, nfds_t __nfds, |
| __const struct timespec *__timeout, |
| __const __sigset_t *__ss); |
| #endif |
| |
| __END_DECLS |
| |
| #endif /* sys/poll.h */ |