diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/pselect.c')
-rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/pselect.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/pselect.c b/REORG.TODO/sysdeps/unix/sysv/linux/pselect.c new file mode 100644 index 0000000000..b5e8c7fbcd --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/pselect.c @@ -0,0 +1,89 @@ +/* Copyright (C) 2006-2017 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) \ + SYSCALL_CANCEL (pselect6, nfds, readfds, writefds, exceptfds, timeout, data) +#endif + + result = CALL_PSELECT6 (nfds, readfds, writefds, exceptfds, timeout, + &data); + +# ifndef __ASSUME_PSELECT + if (result == -1 && errno == ENOSYS) + result = __generic_pselect (nfds, readfds, writefds, exceptfds, timeout, + sigmask); +# endif + + return result; +} +weak_alias (__pselect, pselect) + +# ifndef __ASSUME_PSELECT +# define __pselect static __generic_pselect +# endif +#endif + +#ifndef __ASSUME_PSELECT +# include <misc/pselect.c> +#endif |