| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 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 <signal.h> |
| 21 | #include <sys/syscall.h> |
| 22 | #include <sys/poll.h> |
| 23 | #define __need_NULL |
| 24 | #include <stddef.h> |
| 25 | |
| 26 | #if defined __NR_ppoll && defined __UCLIBC_LINUX_SPECIFIC__ |
| 27 | # ifdef __UCLIBC_HAS_THREADS_NATIVE__ |
| 28 | # include <sysdep-cancel.h> |
| 29 | # else |
| 30 | # define SINGLE_THREAD_P 1 |
| 31 | # endif |
| 32 | |
| 33 | int |
| 34 | ppoll(struct pollfd *fds, nfds_t nfds, const struct timespec *timeout, |
| 35 | const sigset_t *sigmask) |
| 36 | { |
| 37 | /* The Linux kernel can in some situations update the timeout value. |
| 38 | We do not want that so use a local variable. */ |
| 39 | struct timespec tval; |
| 40 | if (timeout != NULL) { |
| 41 | tval = *timeout; |
| 42 | timeout = &tval; |
| 43 | } |
| 44 | if (SINGLE_THREAD_P) |
| 45 | return INLINE_SYSCALL(ppoll, 5, fds, nfds, timeout, sigmask, _NSIG / 8); |
| 46 | |
| 47 | # ifdef __UCLIBC_HAS_THREADS_NATIVE__ |
| 48 | int oldtype = LIBC_CANCEL_ASYNC (); |
| 49 | int result = INLINE_SYSCALL(ppoll, 5, fds, nfds, timeout, sigmask, _NSIG / 8); |
| 50 | LIBC_CANCEL_RESET (oldtype); |
| 51 | return result; |
| 52 | # endif |
| 53 | } |
| 54 | libc_hidden_def(ppoll) |
| 55 | #endif |