| 1 | /* Compatibility definitions for System V `poll' interface. |
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| 2 | Copyright (C) 1994,96,97,98,99,2000,2001 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, write to the Free |
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| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 18 | 02111-1307 USA. */ |
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| 19 | |
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| 20 | #ifndef _SYS_POLL_H |
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| 21 | #define _SYS_POLL_H 1 |
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| 22 | |
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| 23 | #include <features.h> |
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| 24 | |
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| 25 | /* Get the platform dependent bits of `poll'. */ |
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| 26 | #include <bits/poll.h> |
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| 27 | |
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| 28 | |
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| 29 | /* Type used for the number of file descriptors. */ |
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| 30 | typedef unsigned long int nfds_t; |
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| 31 | |
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| 32 | /* Data structure describing a polling request. */ |
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| 33 | struct pollfd |
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| 34 | { |
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| 35 | int fd; /* File descriptor to poll. */ |
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| 36 | short int events; /* Types of events poller cares about. */ |
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| 37 | short int revents; /* Types of events that actually occurred. */ |
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| 38 | }; |
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| 39 | |
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| 40 | |
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| 41 | __BEGIN_DECLS |
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| 42 | |
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| 43 | /* Poll the file descriptors described by the NFDS structures starting at |
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| 44 | FDS. If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for |
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| 45 | an event to occur; if TIMEOUT is -1, block until an event occurs. |
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| 46 | Returns the number of file descriptors with events, zero if timed out, |
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| 47 | or -1 for errors. */ |
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| 48 | extern int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout) __THROW; |
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| 49 | |
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| 50 | __END_DECLS |
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| 51 | |
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| 52 | #endif /* sys/poll.h */ |
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