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1 | /* Checking macros for poll functions. | |
2 | Copyright (C) 2012-2016 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
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. | |
9 | ||
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 | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #ifndef _SYS_POLL_H | |
20 | # error "Never include <bits/poll2.h> directly; use <sys/poll.h> instead." | |
21 | #endif | |
22 | ||
23 | ||
24 | __BEGIN_DECLS | |
25 | ||
26 | extern int __REDIRECT (__poll_alias, (struct pollfd *__fds, nfds_t __nfds, | |
27 | int __timeout), poll); | |
28 | extern int __poll_chk (struct pollfd *__fds, nfds_t __nfds, int __timeout, | |
29 | __SIZE_TYPE__ __fdslen); | |
30 | extern int __REDIRECT (__poll_chk_warn, (struct pollfd *__fds, nfds_t __nfds, | |
31 | int __timeout, __SIZE_TYPE__ __fdslen), | |
32 | __poll_chk) | |
33 | __warnattr ("poll called with fds buffer too small file nfds entries"); | |
34 | ||
35 | __fortify_function int | |
36 | poll (struct pollfd *__fds, nfds_t __nfds, int __timeout) | |
37 | { | |
38 | if (__bos (__fds) != (__SIZE_TYPE__) -1) | |
39 | { | |
40 | if (! __builtin_constant_p (__nfds)) | |
41 | return __poll_chk (__fds, __nfds, __timeout, __bos (__fds)); | |
42 | else if (__bos (__fds) / sizeof (*__fds) < __nfds) | |
43 | return __poll_chk_warn (__fds, __nfds, __timeout, __bos (__fds)); | |
44 | } | |
45 | ||
46 | return __poll_alias (__fds, __nfds, __timeout); | |
47 | } | |
48 | ||
49 | ||
50 | #ifdef __USE_GNU | |
51 | extern int __REDIRECT (__ppoll_alias, (struct pollfd *__fds, nfds_t __nfds, | |
52 | const struct timespec *__timeout, | |
53 | const __sigset_t *__ss), ppoll); | |
54 | extern int __ppoll_chk (struct pollfd *__fds, nfds_t __nfds, | |
55 | const struct timespec *__timeout, | |
56 | const __sigset_t *__ss, __SIZE_TYPE__ __fdslen); | |
57 | extern int __REDIRECT (__ppoll_chk_warn, (struct pollfd *__fds, nfds_t __nfds, | |
58 | const struct timespec *__timeout, | |
59 | const __sigset_t *__ss, | |
60 | __SIZE_TYPE__ __fdslen), | |
61 | __ppoll_chk) | |
62 | __warnattr ("ppoll called with fds buffer too small file nfds entries"); | |
63 | ||
64 | __fortify_function int | |
65 | ppoll (struct pollfd *__fds, nfds_t __nfds, const struct timespec *__timeout, | |
66 | const __sigset_t *__ss) | |
67 | { | |
68 | if (__bos (__fds) != (__SIZE_TYPE__) -1) | |
69 | { | |
70 | if (! __builtin_constant_p (__nfds)) | |
71 | return __ppoll_chk (__fds, __nfds, __timeout, __ss, __bos (__fds)); | |
72 | else if (__bos (__fds) / sizeof (*__fds) < __nfds) | |
73 | return __ppoll_chk_warn (__fds, __nfds, __timeout, __ss, | |
74 | __bos (__fds)); | |
75 | } | |
76 | ||
77 | return __ppoll_alias (__fds, __nfds, __timeout, __ss); | |
78 | } | |
79 | #endif | |
80 | ||
81 | __END_DECLS |