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| Rev | Author | Line No. | Line |
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| 4680 | right-hear | 1 | /* Compatibility definitions for System V `poll' interface. |
| 2 | Copyright (C) 1994,1996-2001,2004,2005,2006 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 20 | #ifndef _SYS_POLL_H |
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| 21 | #define _SYS_POLL_H 1 |
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| 22 | |||
| 23 | #include |
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| 24 | |||
| 25 | /* Get the platform dependent bits of `poll'. */ |
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| 26 | #include |
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| 27 | #ifdef __USE_GNU |
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| 28 | /* Get the __sigset_t definition. */ |
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| 29 | # include |
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| 30 | /* Get the timespec definition. */ |
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| 31 | # define __need_timespec |
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| 32 | # include |
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| 33 | #endif |
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| 34 | |||
| 35 | |||
| 36 | /* Type used for the number of file descriptors. */ |
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| 37 | typedef unsigned long int nfds_t; |
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| 38 | |||
| 39 | /* Data structure describing a polling request. */ |
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| 40 | struct pollfd |
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| 41 | { |
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| 42 | int fd; /* File descriptor to poll. */ |
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| 43 | short int events; /* Types of events poller cares about. */ |
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| 44 | short int revents; /* Types of events that actually occurred. */ |
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| 45 | }; |
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| 46 | |||
| 47 | |||
| 48 | __BEGIN_DECLS |
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| 49 | |||
| 50 | /* Poll the file descriptors described by the NFDS structures starting at |
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| 51 | FDS. If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for |
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| 52 | an event to occur; if TIMEOUT is -1, block until an event occurs. |
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| 53 | Returns the number of file descriptors with events, zero if timed out, |
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| 54 | or -1 for errors. |
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| 55 | |||
| 56 | This function is a cancellation point and therefore not marked with |
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| 57 | __THROW. */ |
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| 58 | extern int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout); |
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| 59 | |||
| 60 | #ifdef __USE_GNU |
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| 61 | /* Like poll, but before waiting the threads signal mask is replaced |
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| 62 | with that specified in the fourth parameter. For better usability, |
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| 63 | the timeout value is specified using a TIMESPEC object. |
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| 64 | |||
| 65 | This function is a cancellation point and therefore not marked with |
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| 66 | __THROW. */ |
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| 67 | extern int ppoll (struct pollfd *__fds, nfds_t __nfds, |
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| 68 | __const struct timespec *__timeout, |
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| 69 | __const __sigset_t *__ss); |
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| 70 | #endif |
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| 71 | |||
| 72 | __END_DECLS |
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| 73 | |||
| 74 | #endif /* sys/poll.h */ |