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28f540f4 | 1 | /* Compatibility definitions for System V `poll' interface. |
dff8da6b | 2 | Copyright (C) 1994-2024 Free Software Foundation, Inc. |
2c6fe0bd | 3 | This file is part of the GNU C Library. |
28f540f4 | 4 | |
2c6fe0bd | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 9 | |
2c6fe0bd UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
28f540f4 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
28f540f4 RM |
18 | |
19 | #ifndef _SYS_POLL_H | |
8a4b65b4 | 20 | #define _SYS_POLL_H 1 |
5107cf1d | 21 | |
8a4b65b4 UD |
22 | #include <features.h> |
23 | ||
39e16978 UD |
24 | /* Get the platform dependent bits of `poll'. */ |
25 | #include <bits/poll.h> | |
7c65e900 | 26 | #ifdef __USE_GNU |
a992f506 ZW |
27 | # include <bits/types/__sigset_t.h> |
28 | # include <bits/types/struct_timespec.h> | |
7c65e900 | 29 | #endif |
39e16978 | 30 | |
3eee1304 UD |
31 | |
32 | /* Type used for the number of file descriptors. */ | |
33 | typedef unsigned long int nfds_t; | |
28f540f4 RM |
34 | |
35 | /* Data structure describing a polling request. */ | |
36 | struct pollfd | |
37 | { | |
38 | int fd; /* File descriptor to poll. */ | |
39 | short int events; /* Types of events poller cares about. */ | |
40 | short int revents; /* Types of events that actually occurred. */ | |
41 | }; | |
42 | ||
28f540f4 | 43 | |
3eee1304 UD |
44 | __BEGIN_DECLS |
45 | ||
28f540f4 RM |
46 | /* Poll the file descriptors described by the NFDS structures starting at |
47 | FDS. If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for | |
48 | an event to occur; if TIMEOUT is -1, block until an event occurs. | |
49 | Returns the number of file descriptors with events, zero if timed out, | |
7761a3ac UD |
50 | or -1 for errors. |
51 | ||
52 | This function is a cancellation point and therefore not marked with | |
53 | __THROW. */ | |
26492c0a | 54 | extern int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout) |
e938c027 | 55 | __fortified_attr_access (__write_only__, 1, 2); |
28f540f4 | 56 | |
7c65e900 UD |
57 | #ifdef __USE_GNU |
58 | /* Like poll, but before waiting the threads signal mask is replaced | |
59 | with that specified in the fourth parameter. For better usability, | |
60 | the timeout value is specified using a TIMESPEC object. | |
61 | ||
62 | This function is a cancellation point and therefore not marked with | |
63 | __THROW. */ | |
64 | extern int ppoll (struct pollfd *__fds, nfds_t __nfds, | |
a784e502 | 65 | const struct timespec *__timeout, |
26492c0a | 66 | const __sigset_t *__ss) |
e938c027 | 67 | __fortified_attr_access (__write_only__, 1, 2); |
26492c0a | 68 | |
a4ed0471 | 69 | # ifdef __USE_TIME64_REDIRECTS |
47f24c21 AZ |
70 | # ifdef __REDIRECT |
71 | extern int __REDIRECT (ppoll, (struct pollfd *__fds, nfds_t __nfds, | |
72 | const struct timespec *__timeout, | |
73 | const __sigset_t *__ss), | |
74 | __ppoll64) | |
e938c027 | 75 | __fortified_attr_access (__write_only__, 1, 2); |
47f24c21 AZ |
76 | # else |
77 | # define ppoll __ppoll64 | |
78 | # endif | |
79 | # endif | |
7c65e900 UD |
80 | #endif |
81 | ||
28f540f4 RM |
82 | __END_DECLS |
83 | ||
d9a216c0 UD |
84 | |
85 | /* Define some inlines helping to catch common problems. */ | |
5ac3ea17 | 86 | #if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function |
d9a216c0 UD |
87 | # include <bits/poll2.h> |
88 | #endif | |
89 | ||
5107cf1d | 90 | #endif /* sys/poll.h */ |