| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 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 |