| /* Copyright (C) 2006-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@redhat.com>, 2006. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <signal.h> |
| #include <time.h> |
| #include <sys/poll.h> |
| #include <kernel-features.h> |
| #include <sysdep-cancel.h> |
| |
| |
| #ifdef __NR_pselect6 |
| # ifndef __ASSUME_PSELECT |
| static int __generic_pselect (int nfds, fd_set *readfds, fd_set *writefds, |
| fd_set *exceptfds, |
| const struct timespec *timeout, |
| const sigset_t *sigmask); |
| # endif |
| |
| |
| int |
| __pselect (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, |
| const struct timespec *timeout, const sigset_t *sigmask) |
| { |
| /* The Linux kernel can in some situations update the timeout value. |
| We do not want that so use a local variable. */ |
| struct timespec tval; |
| if (timeout != NULL) |
| { |
| tval = *timeout; |
| timeout = &tval; |
| } |
| |
| /* Note: the system call expects 7 values but on most architectures |
| we can only pass in 6 directly. If there is an architecture with |
| support for more parameters a new version of this file needs to |
| be created. */ |
| struct |
| { |
| __syscall_ulong_t ss; |
| __syscall_ulong_t ss_len; |
| } data; |
| |
| data.ss = (__syscall_ulong_t) (uintptr_t) sigmask; |
| data.ss_len = _NSIG / 8; |
| |
| int result; |
| |
| #ifndef CALL_PSELECT6 |
| # define CALL_PSELECT6(nfds, readfds, writefds, exceptfds, timeout, data) \ |
| INLINE_SYSCALL (pselect6, 6, nfds, readfds, writefds, exceptfds, \ |
| timeout, data) |
| #endif |
| |
| if (SINGLE_THREAD_P) |
| result = CALL_PSELECT6 (nfds, readfds, writefds, exceptfds, timeout, |
| &data); |
| else |
| { |
| int oldtype = LIBC_CANCEL_ASYNC (); |
| |
| result = CALL_PSELECT6 (nfds, readfds, writefds, exceptfds, timeout, |
| &data); |
| |
| LIBC_CANCEL_RESET (oldtype); |
| } |
| |
| # ifndef __ASSUME_PSELECT |
| if (result == -1 && errno == ENOSYS) |
| result = __generic_pselect (nfds, readfds, writefds, exceptfds, timeout, |
| sigmask); |
| # endif |
| |
| return result; |
| } |
| weak_alias (__pselect, pselect) |
| strong_alias (__pselect, __libc_pselect) |
| |
| # ifndef __ASSUME_PSELECT |
| # define __pselect static __generic_pselect |
| # endif |
| #endif |
| |
| #ifndef __ASSUME_PSELECT |
| # include <misc/pselect.c> |
| #endif |