projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 0ecb606c JJ |
1 | /* Copyright (C) 2006 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. | |
| 3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2006. | |
| 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, write to the Free | |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 18 | 02111-1307 USA. */ | |
| 19 | ||
| 20 | #include <errno.h> | |
| 21 | #include <signal.h> | |
| 22 | #include <time.h> | |
| 23 | #include <sys/poll.h> | |
| 24 | #include <kernel-features.h> | |
| 25 | #include <sysdep-cancel.h> | |
| 26 | ||
| 27 | ||
| 28 | #ifdef __NR_ppoll | |
| 29 | static int __generic_ppoll (struct pollfd *fds, nfds_t nfds, | |
| 30 | const struct timespec *timeout, | |
| 31 | const sigset_t *sigmask); | |
| 32 | ||
| 33 | ||
| 34 | int | |
| 35 | ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout, | |
| 36 | const sigset_t *sigmask) | |
| 37 | { | |
| 38 | /* The Linux kernel can in some situations update the timeout value. | |
| 39 | We do not want that so use a local variable. */ | |
| 40 | struct timespec tval; | |
| 41 | if (timeout != NULL) | |
| 42 | { | |
| 43 | tval = *timeout; | |
| 44 | timeout = &tval; | |
| 45 | } | |
| 46 | ||
| 47 | int result; | |
| 48 | ||
| 49 | if (SINGLE_THREAD_P) | |
| 50 | result = INLINE_SYSCALL (ppoll, 5, fds, nfds, timeout, sigmask, _NSIG / 8); | |
| 51 | else | |
| 52 | { | |
| 53 | int oldtype = LIBC_CANCEL_ASYNC (); | |
| 54 | ||
| 55 | result = INLINE_SYSCALL (ppoll, 5, fds, nfds, timeout, sigmask, | |
| 56 | _NSIG / 8); | |
| 57 | ||
| 58 | LIBC_CANCEL_RESET (oldtype); | |
| 59 | } | |
| 60 | ||
| 61 | # ifndef __ASSUME_PPOLL | |
| 62 | if (result == -1 && errno == ENOSYS) | |
| 63 | result = __generic_ppoll (fds, nfds, timeout, sigmask); | |
| 64 | # endif | |
| 65 | ||
| 66 | return result; | |
| 67 | } | |
| 68 | ||
| 69 | # ifndef __ASSUME_PPOLL | |
| 70 | # define ppoll static __generic_ppoll | |
| 71 | # endif | |
| 72 | #endif | |
| 73 | ||
| 74 | #ifndef __ASSUME_PPOLL | |
| 75 | # include <io/ppoll.c> | |
| 76 | #endif |